A person using a medical device such as a pacemaker may not operate the vehicle because the drive motor carries high pressure and strong magnetic, which may affect the function of the medical device.

Precautions for normal charging

Warning:

If a person uses a medical electric device such as an implantable cardiac pacemaker or an implantable cardioverter defibrillator, the possible effects on the devices must be checked with the device manufacturer before starting the charge operation.

The radiated electromagnetic wave generated by DC/DC that is under normal operation may have an influence on medical electronic equipments.The people who use implanted heart pacemaker or implanted heart defibrillatorshould stay away from it as DC/DC is working (luggage compartment included).

operation precautions for communication equipments

Warning:

The electromagnetic wave of the remote intelligent terminal (TBOX) may affect the function of the medical device such as cardiac pacemaker, cardioverter, defibrillator and other medical electronic devices.

The electromagnetic wave of the remote intelligent terminal (TBOX) may affect medical electronic devices other than cardiac pacemaker, cardioverter, defibrillator. Therefore, for people who is using other medical electronic device, please check with device’s manufacturer for the potential effects of TBOX before using.

The Items need to be inspected before maintenance work starts

Precautions of supplemental restraint system (SRS), "airbag" and "seat belt pretension"

The supplemental restraint system such as “air bag” and “seat belt pretension” can reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch input and airbag module. SRS can confirm whether to release airbag by seat belt switch, or to release one airbag only. The decision depends on the emergency incident’s degree and whether the safety belt is tightened.

Precautions for the maintenance of SRS has been listed in the “airbag” and “safety belt” part.

Warning:

To prevent incidents, please pay attention to following aspects

In prevent SRS from losing efficacy, the maintenance of airbag shall be carried out by operators of JAC or technicians authorized by airbag’s manufacturer.

Improper maintenance, including incorrect disassembling&assembling of SRS, will make SRS unable to start and cause personal injury. For disassembly of spiral harness and airbag module, please see “safety airbag” part for details.

Do not test SRS with electronic devices with any type of circuit, unless the SRS needs to be repaired manually. SRS cable uses harness with yellow or orange color.

Precautions of using power tools (pneumatic or electric) and hammer

Warning:

Pay attention to the following items in case of accidents happening

As you conduct the operation near to air bag sensor or other air bag system sensor, please turn off the power supply,avoid using pneumatic or electric tools or knocking the sensor with hammer. The large vibration is able to start the sensor and open air bag, which may cause serious injuries.

As you use pneumatic or electric tools and hammer, please turn off the power supply, disconnect low voltage power supply with 12V, wait for three minutes, then make use of these tools.

Precautionary measures in removing the 12V battery:

Beforeremoving the 12Vbattery, turn the power switch to “ON”, and then to “LOCK”.

Note：

The automatic 12V battery charge function may start even when the power switch is at “LOCK”position.

After the key rotates from “ON” to “LOCK”, the automatically charging function of 12V battery can not launch.

Precautions For High Pressure

Warning:

As the electric car is with the high-voltage power battery, if the high-pressure system is improperly handled, it will be risky to have the high-voltage electric shock, leakage and the occurrence of similar accidents. Be sure to use the correct work flow during inspection and maintenance.

Before inspecting and servicing the high pressure system and its protection, make sure that the service switch has been disconnected to cut off the high voltage power supply.

Insulation protection equipment, including insulated gloves, insulated shoes and face shields, should be worn before maintenance work on high pressure systems.

High-pressure system overhaul personnel has responsibilities to ensure that other people will not contact the car. When the repair work is suspended, please cover the high-pressure portion with insulating material to prevent other people from contacting.

Note：

In the ready state, the repair switch must not be disconnected.

High voltage protection and equipment confirmation

High voltage corrugated pipe and connector are orange. The orange label “High Voltage” is on high voltage battery holder and other high voltage equipments . Do not have contact with these high voltage protected parts.

Wrap up the high-voltage connector and terminal with insulated tape after removing high-voltage connector.

Precautions for the staff who use electronic medical appliances

Warning:

The vehicle has strong magnetic components,If technical personnel use medical electronic equipment, such as electronic pacemaker, can’t operate in the car, otherwise, the function of the electronic equipment may be affected by strong magnetic components.

The items that shall be avoided in using during repair work.

As the vehicle carries high-voltage and ferromagnetic parts, do not use metal parts in case of short-circuit, or magnetic things (such as bank cards, prepaid card,etc.) These items may be damaged if you take them with you during maintenance process.

Place a sign “Danger! High-voltage area, please keep distance! ” .

In order to attract other staff’s attention, during high-voltage system maintenance, please set a mark reminding “Do not touch it! High voltage work is in process”

General Precautions

Do not disassemble VCU or DC / DC boxes.

When connecting or disconnecting the VCU from the harness, be careful not to damage the terminal pins (bend or break). When reconnecting the harness end plug, check whether the terminal pins are bent or broken.

说明: 接插件图

Preparation work

Common maintenance tool

Tool name		Use description
Insulated gloves (To ensure the protection of an electricity of 1000V / 300A)		Disassembly and assembly of the high voltage parts
Leather gloves (Using leather gloves that can tighten the wrist)		1. Disassembly and assembly of high voltage parts 2. Protect insulated gloves
Insulated shoes		Disassembly and assembly of the high voltage parts
Protective goggles (ANSI Z87.1)		1.Remove and install the high voltage parts 2. Check the wire to prevent the fire splash, protect the eyes
Insulated caps		Disassembly and assembly of the high voltage parts
Insulation Tester (Megohm meter)		Measure the insulation resistance

System Instructions

Components

Components position

Electric drive cabin

Number	part	Function
1	DC charging relay	DC charging relay is integrated in the high-voltage junction box inside. VCU pulls up DC charging relay when in DC charging, and connects the DC charging pile positive and power battery
2	A/C relay	The A / C relay is controlled by the VCU and supplies power to the air conditioning control panel and the compressor controller
3	M/C relay	The M / C relay is controlled by VCU and supplies power to PCU, LBC, condenser fan, electronic cooling water pump and battery fan
4	Electronic coolant pump	Electronic coolant pump provides circulating pressure to the coolant. VCU can control coolant pump’s rotating speed by PWM signal based on vehicle speed and coolant temperature.
5	Cooling fan	The condenser fan is controlled by the VCU. When the air conditioner is switched on or the high voltage cooling circuit needs to be cooled, the VCU controls the speed of the condenser fan through the PWM signal
6	Water temperature sensor	VCU can monitor the temperature of coolant in high-pressure cooling system through water-temperature sensor. The sensor’s value of resistance changes with the change of temperature. The VCU will figure out coolant temperature according to the collected data.
7	PCU	Transmit the DC power of the power battery into AC power, and the implementation of the VCU torque command to complete the torque output
8	12V battery	Provides power for low voltage systems
9	Reversing light relay	When gearbox is at reverse gear, VCU will receive the gear signal and light up the reverse lamp by controlling reverse lamp’s relay.
10	Car Charger	Transmit the external access AC power into DC for the power battery charge
11	Air conditioning compressor controller	Control air conditioning compressor speed based on the crew cabin and power battery cooling requirements

Crew cabin

A vehicle controller B remote intelligent terminal C low-voltage distribution controller

Number	part	Function
1	instrument	Display vehicle basic information, fault lights, indicator lights, statement tips. See the "instrument" section
2	Timing charge switch	By operating this switch, the user can activate remote charging and regular charging.
3	Remote intelligent terminal	Real-time monitoring of vehicle safety information; users can remote control terminal remote control function
4	Pedestrian warning controller	When a vehicle is moving at low speed, it can make alarming sound to draw pedestrian’s attention.
5	Low voltage distribution controller	The low-voltage distribution controller receives the key "ON" signal, remote wake-up signal, DC charge wake-up signal or AC charging wake-up signal, supplies power for VCU, VSP, A / C relay, M / C relay and charge indicator. VCU can control the power down time through the low voltage distribution controller.
6	Accelerator pedal position sensor	The accelerator pedal position sensor is integrated in the accelerator pedal to convert the driver's pedal position signal into a voltage signal and send it to the VCU.
7	The brake pedal position sensor	The brake pedal position sensor is integrated in the brake pedal to convert the driver's pedal position signal into a voltage signal and send it to the VCU.
8	Brake switch	The brake switch is integrated in the brake pedal to convert the driver's pedal position signal into a voltage signal and send it to the VCU.
9	Battery controller
10	Shift control mechanism	Collect the signal that the driver is operating on the gearshift mechanism
11	Parking brake (EPB)	Please use parking brake when you need to park your vehicle.
12	SPORT button	Collect the signal of driver's choice of driving mode
13	MP5	Receive the vehicle energy flow sent by VCU, energy consumption, gear and other information and display
14	Air conditioning panel controller	Collecting the driver operation on the temperature, air flow and other information, and control fans, compressors and so on
15	High voltage positive relay	High voltage positive relay is integrated inside the power pack. When the power battery is charged or discharged, the VCU turns on or off the high voltage circuit positive pole to the power battery by pulling or disconnecting the high voltage positive relay
16	High voltage negative relay	High voltage negative relay is integrated inside the power pack. When the power battery is charged or discharged, the VCU turns on or off the high voltage circuit negative pole to the power battery by pulling or disconnecting the high voltage negative relay
17	Precharge relay	The precharge relay is integrated inside the power pack. In order to avoid the impact of instantaneous high voltage on the high-pressure components, VCU needs to pull precharge relay before pulling the high-voltage positive relay

VCU

VCU (Vehicle Controller Unit)judges the current state of operation of the vehicle and reasonably control vehicle behavior through a variety of sensors and the feedback of the controller information.

Low voltage distribution controller

The low-voltage distribution controller receives the key "ON" signal, remote wake-up signal, DC charge wake-up signal or AC charging wake-up signal, supplies power for VCU, VSP, A / C relay, M / C relay and charge indicator. VCU can control the power down time through the low voltage distribution controller.

M/C relay

The M / C relay is controlled by VCU and supplies power to PCU, LBC, condenser fan, electronic cooling water pump and battery fan

A/C relay

The A / C relay is controlled by the VCU and supplies power to the air conditioning control panel and the compressor controller

High voltage positive relay

High voltage positive relay is integrated inside the power pack. When the power battery is charged or discharged, the VCU turns on or off the high voltage circuit positive pole to the power battery by pulling or disconnecting the high voltage positive relay

High voltage negative relay

High voltage negative relay is integrated inside the power pack. When the power battery is charged or discharged, the VCU turns on or off the high voltage circuit negative pole to the power battery by pulling or disconnecting the high voltage negative relay

Precharge relay

The precharge relay is integrated inside the power pack. In order to avoid the impact of instantaneous high voltage on the high-pressure components, VCU needs to pull precharge relay before pulling the high-voltage positive relay

DC charging relay

DC charging relay is integrated in the high-voltage junction box inside. VCU pulls up DC charging relay when in DC charging, and connects the DC charging pile positive and power battery

The acceleration pedal position sensor

The accelerator pedal position sensor is integrated in the accelerator pedal to convert the driver's pedal position signal into a voltage signal and send it to the VCU.

The brake pedal position sensor

The brake pedal position sensor is integrated in the brake pedal to convert the driver's pedal position signal into a voltage signal and send it to the VCU.

Water temperature sensor

VCU can monitor the temperature of coolant in high-pressure cooling system through water-temperature sensor. The sensor’s value of resistance changes with the change of temperature. The VCU will figure out coolant temperature according to the collected data.

Electronic coolant pump

Electronic coolant pump provides circulating pressure to the coolant. VCU can control coolant pump’s rotating speed by PWM signal based on vehicle speed and coolant temperature.

Cooling fan

The condenser fan is controlled by the VCU. When the air conditioner is switched on or the high voltage cooling circuit needs to be cooled, the VCU controls the speed of the condenser fan through the PWM signal

Pedestrian warning system

This system, by controlling electric honk, can make different alarming sound to draw driver and pedestrian’s attention when vehicle is in different status.

Condition		Action
Charging cable connected		Beep one time
charging started		Beep twice
Vehicle moving forward	Vehicle speed≦30km/h	Beep’s volume will increase with vehicle speed’s increasing
	Vehicle speed＞30km/h	No beeping
Vehicle reversing		Keep beeping

Electric instrumentation

The VCU controls the information and warning lights and indicators in the following electric instrument.

Power battery

1 Power battery thermometer

The VCU receives the temperature signal from the power cell of the LBC and sends the information to the electric instrument and displays it.

2 Power battery power meter

The VCU calculates the power signal of the battery and sends the data to the electric instrument and displays it.

3 Power battery available capacity table

The VCU calculates the available power information of the battery and sends the information to the electric instrument and displays it.

4 Power meter

The VCU calculates the motor’s power and sends the information to the electric instrument and displays it.

Warning and indicator light

READY indicator light

The VCU communicates the control signal to the electric instrument via CAN communication. When the key is rotated to "START" and the vehicle or component is not faulty, the indicator light is on, indicating that the vehicle has been turned on and the vehicle is ready in a running state.

Condition	Display status
The key is rotated to "START" and the vehicle and components are not faulty	Constant light on
Except for this situation	Extinguished

Limit power indicator light

When the power battery is low or the vehicle is in limit power mode, this indicator light is on. The VCU communicates the control signal to the electric instrument via CAN communication.

Condition	status
The key is placed in the "ON" for power self-test	Flash for 2 seconds
When the key is set to "ON" or rotated to "START", the power battery is low or the vehicle is in limit power mode	Constant light on
Except for this situation	Extinguished

Charging indicator light

The charging indicator lights when the battery is running low; or during the charging process, the key is set to "ON" and the charge indicator lights. VCU would send control signal to the instrument via CAN communication when the VCU detects a low power or during charging.

Condition	status
The key is placed in the "ON" for power self-test	Flash for 2 seconds
When the key is placed in the "ON" or rotated to "START", and vehicle power is too low	Constant light on
When the vehicle is in the charging state, and the key is placed in "ON"	Constant light on
Except for this situation	Extinguished

Charging line connection indicator light

When the charging cable is connected with a charging pile or a household charging plug, and the key is placed at “ON”，the charging cable connection indicator lights on. VCU would send control signal to the instrument via CAN communication when the VCU detects charging cable connection.

Condition	status
The key is placed in the "ON" for power self-test	Flash for 2 seconds
When the charging cable is connected to a charging pile or a household charging plug and the key is placed in the "ON"	Constant light on
Except for this situation	Extinguished

Motor fault warning light

When the key is placed in the "ON" gear, the motor fault indicator will be on if failure exists in motor. Please contact the JAC authorized dealers

. VCU receives the fault information sent by the PCU and transmits the control signal to the instrument through CAN communication.

Condition	Status
The key is placed in the "ON" for power self-test	Flash for 2 seconds
When the key is placed in the "ON" or rotated to "START", and the motor is faulty	Constant light on
Except for this situation	Extinguished

High voltage cut off indicator light

When vehicle collision occurs, or safety failure exists in the power battery, VCU will cut off high-voltage and the high-voltage cut-off indicator will be on. The vehicle can not move at this status, please contact JAC authorized dealers. VCU would send control signal to the instrument via CAN communication when the VCU detects high voltage relay cut off.

Condition	Status
The key is placed in the "ON" for power self-test	Flash for 2 seconds
When vehicle collision occurs, safety failure exists in the power battery, and the high-voltage is cut off.	Constant light on
Except for this situation	Extinguished

Battery fault indicator light

When the power battery failure occurs and the power battery failure warning light is on, please contact the JAC authorized dealers VCU receives the LBC report fault through the CAN communication to send the control signal to the instrument.

Condition	Status
The key is placed in the "ON" for power self-test	Flash for 2 seconds
When the power battery is faulty	Constant light on
Except for this situation	Extinguished

Vehicle control system

Pure electric drive system description

Vehicle control system overview

Battery energy is a vehicle power storage unit, and is provided in the form of direct current directly to the high voltage power supply system, and transmits the power into a voltage of 13V-15V via DC / DC to supply power to low-voltage system.

VCU receives the information of each part, synthetically judges the whole vehicle state, realizes the coordinated control of the system.

Control function list

Function	Description
System start control	Refer to“System start control”
High voltage power supply control	Refer to“High voltage power supply control”
Motor drive control	Refer to“Motor drive control”
Energy recovery control	Refer to“Energy recovery control”
S-mode control	Refer to “S-mode control”
AC charging control	Refer to “AC charging control”
DC charging control	Refer to “DC charging control”
High-voltage cooling control	Refer to“High-voltage cooling control”
Battery thermal management control	Refer to “Battery thermal management control”
Power cut off control	Refer to “Power cut off control”
12V battery automatic charge control	Refer to “12V battery automatic charge control”
Remote control	Refer to “Remote control”

VCU system block diagram

Cooling fan controller Cooling water pump controller Charging indicator short-circuiter Low voltage distribution box Other low-voltage electric equipments

System start control

System instructions

System principle

Input and output signal list

Output signal / controller	Signal name	Input part	Signal type
Power switch	ON/START/OFF signal	VCU	Voltage
Car Charger	AC charge wake-up signal		Voltage
DC charging pile	DC charge wake-up signal		Voltage
Remote intelligent terminal	Remote wake-up		CAN and voltage
	Remote air conditioner		CAN and voltage
	Remote charging		CAN and voltage
	winter pre-heating		CAN and voltage
VCU	DC/DC enabled	DC/DC	Voltage
	High voltage relay command	LBC	CAN
	Motor related commands	PCU	CAN
	Start / cut off	Fan	Voltage
	Start / cut off	Water pump	Voltage

System start control

VCU acquisition sensor signal controls vehicle control system start and stop. VCU can also control its own power-down time through a low-voltage distribution controller.

Vehicle start (KEY ON)

When the key is placed in the "ON" to wake VCU, VCU control M / C relay to supply power to the motor controller and battery controller. VCU transmits the relevant control commands to complete the vehicle system to start through CAN communication.

READY mode

Turn the key to the "START", and the VCU transmits the associated control command to PCU and LBC via CAN communication, thus the vehicle is in a traveling ready state.

Note：

VCU prohibits the vehicle into the READY mode in the following circumstances

The charging connection cable is connected

Power battery power is too low and other serious failures

Vehicle control system 12V serious undervoltage and other serious failures

High voltage power supply control

System instructions

System principle

Input and output signal list

Output signal / controller	Signal name	Input part	Signal type
Power switch	ON/START/OFF signal	VCU	Voltage
DC charging pile	Brake signal		Voltage
DC charging pile	The brake pedal position sensor		Voltage
Car Charger	AC charge wake-up signal		Voltage
Remote intelligent terminal	Remote wake-up		CAN and voltage
	Remote air conditioner		CAN and voltage
	Remote charging		CAN and voltage

Description

After the vehicle controller receives a wake up signal from the power switch, the DC charging pile, vehicle charging machine or a remote intelligent terminal, directly controls the high voltage relay or off, to complete the high pressure system on or off.

Motor drivecontrol

System instructions

System block diagram

Input and output signal list

Input signal/controller	Signal name	Input component	Signal type
Brake Pedal	Brake switch signal	VCU	Voltage
Brake Pedal	Brake pedal position signal		Voltage
Accelerator pedal	Brake pedal position signal		Voltage
Brake Pedal	Brake switch signal		Voltage
EPB	EPB state signal		Voltage
ABS controller	ABS working state signal		CAN
ABS controller	ABS fault state signal
LBC	Battery related signal
VCU	Motor related order	PCU

Description

PCU can transform the DC from power battery into AC which can be applied by DC. Then the motor will finish the torque output.

VCU can figure out vehicle’s target torque based on accelerator pedal’s position signal, gear signal and vehicle speed signal. Then VCU will send order of torque demand to PCU through CAN communication.

The output limit and output stop request list.

Demand ECU	Restrict reason	Limit power prompt	Conditions
PCU	IGBT over heated	Yes	IGBT over heated
	TM over heated	Yes	TM over heated
	PCU over heated	Yes	PCU over heated
	Message lost	Yes	VCU not receiving PCU messages
LBC	Total pressure under-voltage	Yes	When the total battery voltage is low
	Thermal instability	Yes	Thermal instability
	Temperature is too high	Yes	Cell temperature is too high
	Message lost	Yes	VCU not receiving PCU messages
VCU	Acceleration / brake signal is unreasonable	Yes	Acceleration / brake pedal sensor signal is abnormal
DCDC	Power supply is abnormal	Yes	Battery power is less than 11V

Energy recoverycontrol

System instructions

energy recovery means during vehicle’s coasting or braking process, the motor will change from driving state to power-generating state, and transform vehicle’s kinetic energy into electric energy, and store the electric energy into power battery. Meanwhile, the vehicle can use revolving resistance during energy recovery as part of braking force so as to brake and reduce speed.

When the vehicle is coasting or braking, the VCU calculates the energy recovery power according to the ABS status, the power battery status, the brake pedal position signal, and vehicle’s decelerating need. Then VCU will send the command to the motor controller to start the energy recovery. VCU can calculate the maximum charging amount according to the maximum charging power signal of power battery. VCU can calculate appropriate motor braking power and confirm energy-recovering amount according to driver’s operation on brake pedal. Then VCU will send the target torque to motor controller.

Note：

When the battery power or the speed is too high or low and vehicle has failure, VCU will stop the energy recovery. At this time, the deceleration may become weak when driver is releasing accelerator pedal.

S-mode control

System Instructions

Input and output signal list

Input signal/controller	Signal name	Input component	Signal type
Brake Pedal	Brake switch signal	VCU	Voltage
Brake Pedal	Brake pedal position signal		Voltage
Accelerator pedal	Pedal open degree signal		Voltage
ECO button	ECO signal		Voltage
ABS controller	ABS working state signal		CAN
ABS controller	ABS fault state signal
VCU	Motor related order	PCU
	Power limitation order	AC	CAN
	Power limitation order	EC	CAN

Instruction

VCU decides whether to switch into SPORT mode according to motor status, accelerator/brake pedal status, A/C status, parking status and SPORT command.

In SPORT mode, vehicle's accelerating and power performance will be enhanced.

AC chargingcontrol

Input and output signal list

Input signal/controller	Signal name	Input component	Signal type
MP5	Timing charging switch signal	VCU	CAN
LBC	Power battery total voltage		CAN
	Signal power battery highest voltage		CAN
	Signal power battery lowest voltage		CAN
	Signal power battery highest temperature		CAN
	Signal power battery lowest temperature		CAN
Charger on vehicle	Alternating current charge rouse signal		Voltage
Charger on vehicle	Charger state		CAN
VCU	Charge current order	Charger on vehicle	CAN
	Charge voltage order	Charger on vehicle	CAN
	Charge indicator light order	Charge indicator light	Voltage

Description

When the VCU judges the vehicle in the charging mode and pulls the M / C relay, VCU would send charging current command to the vehicle charger according to the power battery charging power and the state of the vehicle charger. At the same time, the car charger pulls AC charging relay, and VCU pulls system high voltage positive relay and high voltage negative relay, and then power battery starts to charge.

DC chargingcontrol

Input and output signal list

Input signal/controller	Signal name	Input component	Signal type
Direct current charge port	Direct charge rouse signal	VCU	Voltage
Direct current charge port	Direct current charge device state		CAN
LBC	Power battery total voltage		CAN
	Signal power battery highest voltage		CAN
	Signal power battery lowest voltage		CAN
	Signal power battery highest temperature		CAN
	Signal power battery lowest temperature		CAN
VCU	Charge current order	Direct current charge device	CAN
	Charge voltage order	Direct current charge device	CAN
	Charge indicator light order	Charge indicator light	Voltage

Description

When the DC charging device interface is connected to the DC charging charging port of the vehicle, the DC charging device sends the charging wake-up signal to the VCU, VCU would pull the M / C relay and send charge current command according to the state of the rechargeable power of the power battery and the state of the vehicle charger. At the same time, VCU pulls AC charging relay, system high voltage positive relay and high voltage negative relay, and then power battery starts to charge.

High-voltage cooling control

System Instructions

VCU controls electronic coolant pump and fan according to multiple sensor signal and controller’s communication signal.

System principle

Electronic coolant pump

Control description

when vehicle is moving, VCU will control electronic coolant pump’s rotating speed by sending PWM signal, based on the temperature of motor, PCU, IGBT, coolant and the signal of vehicle speed. When vehicle is in AC charging status, VCU will control electronic coolant pump’s rotating speed by sending PWM signal, based on temperature of coolant and vehicle charger. when vehicle is in DC charging status, VCU will control electronic coolant pump’s rotating speed by sending PWM signal, based on the temperature of coolant. The details are indicated in following list.

The vehicle is in running state

Unit:%

Working condition	Coolant temperature	Vehicle speed
Working condition	Coolant temperature	Vehicle speed≦80km/h	Vehicle speed＞80km/h
Non-limit working condition (motor temperature＜120℃ and PCU temperature＜70℃ and IGBT temperature＜75℃)	＞40℃	65	65
	≦40℃	30	65
Limit working condition (motor temperature≧120℃ or PCU temperature≧70℃ or IGBT temperature≧75℃)	＞40℃	98	98
	≦40℃	98	98

The vehicle is in AC charging state

Unit:%

Coolant temperature	Vehicle charger temperature
Coolant temperature	≦55℃	55℃＜ Temperature ≦80℃	＞80℃
＞60℃	98	98	98
≦60℃	10 (Stop)	30	98

The vehicle is in DC charging state

Unit:%

Coolant temperature	Duty cycle
＞60℃	98
≦60℃	20

Note：

When PWM signal is 10, electronic coolant pump will stop working.

Safety-failure mode

If failure is detected by electronic coolant pump, the controlling strategy of coolant pump can be indicated in the following list.

Malfunction ID	Failure Name	Solutions for malfunction
Malfunction ID	Failure Name	Solutions for malfunction
1	Temperature protection of electronic coolant pump’s controller	The coolant pump controller detects that: a) controller temperature is 125℃: coolant pump works in derated status (70% of normal rotating speed); 135℃: coolant pump stops working; lower than 125℃: coolant pump restores to normal working status. B) controller temperature＜-40℃, coolant pump stops working; when controller temperature≧-40℃ is detected, the coolant pump will restore normal working.
2	Locked-rotor protection of electronic coolant pump	When locked-rotor current exceeds set value, or the electromotive force is 0, the coolant pump will stop working; When the failure is eliminated, the coolant pump will restore working.
3	Dry-grinding protection of electronic coolant pump	Judge of coolant pump’s rotating speed and input current: a) if the system detects that rotating speed of electronic coolant pump ＞4000rpm, and current≤1.5A last for 30 seconds, the coolant pump will switch into limping mode, b) limping mode: the coolant pump will work in constant speed of 2500rpm. If the coolant pump’s current ≥1A is detected for more than 10 seconds, the water pump will restore normal working status. (BW needs to confirm the feasibility of this method. If feasible, BW should provide new sample machine to JAC before July 18th for verification of whole vehicle.
4	Short-circuit between control input end of coolant pump and ground	Coolant pump will switch into emergency working status nmax, and restore normal working status when the failure is eliminated.
5	Short-circuit between control input end of coolant pump and power supply.	Coolant pump will switch into emergency working status nmax, and restore normal working status when the failure is eliminated.
6	Open-circuit of input end of coolant pump	Coolant pump will switch into emergency working status nmax, and restore normal working status when the failure is eliminated.
7	Absolute error of PWM input frequency is too large	Coolant pump will switch into emergency working status nmax, and restore normal working status when the failure is eliminated.
8	Over-voltage/over-current/under-voltage protection of coolant pump	A) over-current: if pump’s working current ＞45A is detected, the pump will stop working; when the fault-clearing of over-current is detected, the pump will restore working. B) over voltage: if pump’s working voltage ＞18V is detected, the pump will stop working; when the fault-clearing of over-voltage is detected, the pump will restore working. C) under-voltage: if pump’s working voltage ＜8V is detected, the pump will stop working; when the fault-clearing of under-voltage is detected, the pump will restore working.

Cooling fan control

Control description

VCU sends different duty ratio signals to control the rotating speed of cooling fan, by judging request signal of A/C fan, motor temperature, PCU temperature, IGBT temperature, coolant temperature and vehicle speed. The rotating speed of cooling fan, which is judged by VCU, is the maximum value selected from requests of compressor power, coolant temperature, motor temperature, PCU temperature and IGBT temperature. The details are indicated in following list.

The vehicle is in running state

Unit:%

Compressor power (kW)	Speed (km / h)
Compressor power (kW)	0-20	20-50	50-80	80 or above
1.5kw or above	85	100	100	100
1.3Kw or below	65	55	55	0 (Stop)

Unit: %

Coolant temperature	Speed (km / h)
Coolant temperature	0-20	20-50	50-80	80 or above
Above 60℃	100	100	100	100
55℃＜ Temperature ≦60℃	65	65	65	0 (Stop)
≦55℃	0 (Stop)	0 (Stop)	0 (Stop)	0 (Stop)

Unit: %

Motor temperature≧120℃ or PCU temperature≧75℃ or IGBT temperature≧70℃	100
Motor temperature＜120℃ and PCU temperature＜75℃ and IGBT temperature＜70℃)	0 (Stop)

The vehicle is in charging state

Unit:%

Compressor power (kW)	Duty cycle
A/C is on (1.5kw or above)	85
A/C is off (1.3Kw or below)	65
Air conditioning off	0 (Stop)

Unit: %

Coolant temperature	Duty cycle
Above 60℃	100
55℃＜ Temperature ≦60℃	65
≦55℃	0 (Stop)

Note:

According to the input and output linear curve set by the condenser fan, when the condenser fan receives the PWM signal as 0, the condenser fan stops working.

Battery thermal management control

System instructions

System principle

Description

In the case of low/high temperature of power battery, VCU will heat or refrigerate power battery according to vehicle mode, fault handling, noise reduction strategy, ambient temperature and battery temperature. VCU can control the water-heater and battery chiller according to battery cell’s highest/lowest temperature, so as to heat/refrigerate the battery, and guarantee that battery is always at optimal working temperature range.

Battery thermal management system adopts dual evaporator structure design, respectively, for the crew cabin and power battery.

Power cut-offcontrol

System description

System principle

Description

The electric vehicle uses the high-voltage power. When the vehicle suffers from collision or critical fault (the insulation fault, the power battery over-temperature/over-voltage, the power motor over-current/overheat and so on), the VCU will cut off the relay on the high-voltage circuit in order to ensure crews’ safety.

12V battery automatic charge control

System description

System principle

Description

12V battery automatic charge control function is to prevent the 12V battery voltage due to a long time placement resulting in low voltage impact of vehicle start. The remote intelligent terminal automatically wakes up the vehicle controller every 60 hours. After the vehicle controller receives the 12V charging instruction of the remote intelligent terminal, it controls the high voltage power supply and the power battery charges the 12V battery through the DCDC.

Note:

When the 12V battery is charging automatically, the charging indicator flashes in yellow color.

When the system is in the 12V battery automatic charging, the power switch start and charge will lead 12V automatic charging function to exit.

Control description

When vehicle placement time is more than 60 hours, VCU controls DCDC to charge 12V battery for 15 minutes.

The 12V automatic charging function will be exited and remote intelligent terminal timing will be cleared if any of the following conditions are met:

- When the key is placed in the "ON" or rotated to "START"

- Start DC or AC charging

- Start remote air conditioning or remote charging

Note:

When the 12V battery is automatically charging, the power switch is turned on or off, 12V battery charging will stop.

Remote control

Users use the smart phone to transmit remote control commands through the GPRS/SMS network communication to the vehicle remote intelligent terminal, so as to control vehicle-related components and achieve remote query, remote A/C control or charging.

JAC Remote Intelligent Information Service System

JAC remote intelligent information service system block diagram

CAN bus communication

Input signal list

Input part	Signal name
Vehicle controller	Remote air conditioning status
	Remote charging status
	Charge plug status
	Air conditioning on reference remaining mileage
	Air conditioning off reference remaining mileage
	Slow charge complete remaining time
	DC charge complete remaining time
	Remaining power
	Function working condition of pre-heating
	Elapsed time of preheating

Output signal list

Output part	Signal name
Vehicle controller	Remote air conditioning on / off command
	Remote charging on / off command
	Remote query command
	Remote wake-up command
	Remote winter preheating on/off command

Remote air conditioner

Before driving or after parking, through the JAC new energy information service center, the use of smart phones can remotely control air conditioning. The implementation of remote air conditioning control could be realized where the vehicle is under the wireless signal cover.

Air conditioning on

working principle

● Users operate air conditioning on with smart phones ;

● Mobile phone sends data to the remote intelligent terminal through SMS;

● The remote intelligent terminal receives the instruction and is awakened;

● The remote intelligent terminal wakes up the vehicle controller through the hard line signal and sends the remote air conditioner opening command through the CAN bus.

● The vehicle controller is awakened and starts air conditioning. The vehicle controller sends the vehicle controller status signal and the air conditioning status signal to the remote intelligent terminal through the CAN bus;

● JAC New Energy Information Service Center receives the air conditioning status feedback from the remote intelligent terminal and informs the user of the operation result.

Air conditioning off

working principle

● Users operate air conditioning off with smart phones ;

● Mobile phone sends data to the remote intelligent terminal through SMS;

● The remote intelligent terminal receives commands to send remote air conditioning off commands through the CAN bus;

● The vehicle controller turns off the air conditioning. The vehicle controller sends the vehicle controller status signal and the air conditioning status signal to the remote intelligent terminal through the CAN bus;

● JAC New Energy Information Service Center receives the air conditioning status feedback from the remote intelligent terminal and informs the user of the operation result.

Remote charge (immediate charge/timing charge)

Before driving or after parking, through the JAC new energy information service center, the use of smart phones can remotely control charging. The remote charging control is performed when the charging cable must be connected to the vehicle and the vehicle must be in a place where the wireless signal can cover it.

Charging start

working principle

● Users operate charging start with smart phones ;

● Mobile phone sends data to the remote intelligent terminal through SMS;

● The remote intelligent terminal receives the instruction and is awakened;

● The remote intelligent terminal wakes up the vehicle controller through the hard line signal and sends the remote charging start command through the CAN bus.

The vehicle controller sends the vehicle controller status signal and the charging status signal to the remote intelligent terminal through the CAN bus;

● JAC New Energy Information Service Center receives the charging status feedback from the remote intelligent terminal and informs the user of the operation result.

Timing charge

working principle

● Users operate timing charging start with smart phones ;

● Mobile phone sends data to the remote intelligent terminal through SMS;

● The remote intelligent terminal receives the command and start countdown;

● After the completion of the timer, the remote intelligent terminal provides the hard line signal to the vehicle controller and sends the remote charging close command through the CAN bus.

The vehicle controller sends the vehicle controller status signal and the charging status signal to the remote intelligent terminal through the CAN bus;

● JAC New Energy Information Service Center receives the charging status feedback from the remote intelligent terminal and informs the user of the operation result.

Charging end

working principle

● Users operate charging end with smart phones ;

● Mobile phone sends data to the remote intelligent terminal through SMS;

● The remote intelligent terminal receives the command;

● The remote intelligent terminal receives commands to send remote charging end commands through the CAN bus;

The vehicle controller sends the vehicle controller status signal and the charging end status signal to the remote intelligent terminal through the CAN bus;

● JAC New Energy Information Service Center receives the charging status feedback from the remote intelligent terminal and informs the user of the operation result.

Winter pre-heating

Before starting vehicle or after parking, the user can use smartphone to remotely control winter pre-heating (high/low gear optional) through JAC new-energy information service center. Furthermore, the user can set time for using vehicle, and the vehicle can automatically start pre-heating battery pack and A/C in advance (system set temperature: 20℃) The vehicle must be connected to charging cable, and parked within the range where the wireless signal can cover.

Turn on winter pre-heating

Working principle

● Users select winter pre-heating function on smartphones;

● Users select winter pre-heating function on smartphones, then choose the pre-heating level and set time for using vehicle;

● Mobile phone sends data to the remote intelligent terminal through SMS;

● The remote intelligent terminal receives the command and is awakened. Then it will judge the set time for vehicle-using;

① if the set time for vehicle-using is instant awakening, the winter pre-heating will be activated immediately

② if the set time for vehicle-using is not instant awakening, VCU will judge the heating time and figure out the second awakening time. Then VCU will wait for second awakening and then activate pre-heating;

● The remote intelligent terminal wakes up the vehicle controller through the hard line signal and sends the winter pre-heating turn-on command through the CAN bus.

● The vehicle controller is awakened, starts heating battery pack and turns on A/C. The vehicle controller sends its own status signal to the remote intelligent terminal through the CAN bus;

● JAC New Energy Information Service Center receives the winter pre-heating status’ feedback from the remote intelligent terminal and informs the user of the operation result.

Turn off winter pre-heating

Working principle

● the user use smartphone to select “turn off winter pre-heating” (the heating will be turned off automatically when heating time has reached to 1h and temperature has reached to specified gear);

● Mobile phone sends data to the remote intelligent terminal through SMS;

● The remote intelligent terminal receives commands to send remote air conditioning turn-off commands through the CAN bus;

● The vehicle controller turns off the winter pre-heating. The vehicle controller sends its own status signal to the remote intelligent terminal through the CAN bus;

● JAC New Energy Information Service Center receives the winter pre-heating status’ feedback from the remote intelligent terminal and informs the user of the operation result.

Remote query

Before driving or after parking, through the JAC new energy information service center, the use of smart phone can query the current state of the vehicle. The implementation of remote query could be realized where the vehicle is under the wireless signal cover.

Working principle

● Use the smart phone to remotely query the vehicle status;

● Mobile phone sends data to the remote intelligent terminal through SMS;

● The remote intelligent terminal receives the instruction and is awakened;

● The remote intelligent terminal wakes up the vehicle controller through the hard line signal and sends the remote query command through the CAN bus.

● The vehicle controller is awakened and starts other controllers,and the vehicle controller sends the vehicle controller status signal and the vehicle status signal to the remote intelligent terminal through the CAN bus;

● JAC New Energy Information Service Center receives the vehicle status feedback from the remote intelligent terminal and informs the user of the operation result.

CAN communication

System description

CAN (Controller Area Network) is a real-time serial communication channel. The vehicle multi-channel communication channel has high communication speed and high fault tolerance. There are multiple controllers on the vehicle that share information with each other. Each controller is connected by two communication lines (CAN-H line and CAN-L line). Each controller can send or receive data, but only selectively receive the required data.

Online Diagnostic (OBD) System

Diagnostic description

The online diagnostic system is used to detect vehicle failure. Vehicle failure is stored in the VCU as a DTC, and diagnostic information is obtained through a diagnostic tool.

Diagnostic System (VCU)

Diagnostic tool function

Function

Diagnostic test mode	Function
ECU identifier	Readable ECU hardware version number and software version number
Self-diagnosis	Quickly read and erase the diagnostic results
Data monitoring	Read VCU input and output data
Work support	This mode uses diagnostic tools to provide technical personnel with operational hints to make them faster and more efficient

When the VCU memory is erased, the diagnostic fault code information is cleared;

Work support mode

Work item

Work item	Condition	Usage
Replace the VCU and write the data	In this mode, data is written to the VCU from the new energy vehicle diagnostic tool	Used when replace VCU
Write VIN code (manual)	Write the VIN code to the VCU	Used when write the VIN code to the VCU

Self-diagnostic mode

Self-diagnosis item

To read the DTC, refer to the "DTC Index"

How to clear DTC

Press the new energy vehicle diagnostic tool to clear the DTC button, turn the key to the "LOCK" block, wait 10S and turn the key to "ON" to clear the DTC.

Use the diagnostic tool to confirm the presence of DTCs in other controllers.

Data monitoring mode

Monitoring items

Monitoring items	unit	Description
Vehicle speed	Km/h	Displays the current vehicle speed
Mileage	Km	Display the total mileage of the vehicle by the instrument, with the range 0 to 16777215
12V battery voltage	V	Displays the 12V battery acquisition voltage
5V power supply filtering	V	Displays the 5V voltage value collected by VCU
Key state	KEY OFF/KEY ON/KEY START	Displays the key state: KEY OFF indicates that the key is in KEY OFF state KEY ON indicates that the key is in KEY ON state KEY START indicates that the key is in KEY START state
Gear position	R/N/D	Displays the current gearshift gear: R stands for reverse gear N stands for neutral gear D stands for forward gear
Water pump PWM	%	Displays the PWM signal duty cycle sent by the VCU to the pump controller
Fan PWM	%	Displays the PWM signal duty cycle sent by the VCU to the fan unit
Brake switch state	Brake / no brake	Display the status of the brake switch: Brake indicates that the brake pedal has been pressed No brake indicates that the brake pedal has not been pressed
Brake light status	Lights off / lights on	Display the status of the brake light: Lights off indicates that the brake light is off Lights on indicates that the brake light is on
Accelerator pedal 1 opening	%	Displays the ratio of the depth of the accelerator pedal 1
Accelerator pedal 2 opening	%	Displays the ratio of the depth of the accelerator pedal 2
Brake pedal 1 opening	%	Displays the ratio of the depth of the brake pedal 1
Brake pedal 2 opening	%	Displays the ratio of the depth of the brake pedal 2
Coolant temperature	℃	Displays the temperature of the coolant with the range of -40 ° C to 210 ° C
SSO enabled	Enable / disable	Displays the state where the VCU sends SSO enabled: Enable indicates the SSO enable Disable indicates the SSO disable
S-mode switch status	Enable / disable	Display the status of the S-mode switch: Enable indicates the S-mode switch is pressed Disable indicates the S-mode switch is not pressed
DCDC hardwired enabled	Enable / disable	Displays DCDC hardwire status: Enable indicates DCDC hardwire is enabled Disable indicates DCDC hardwire is disabled
Hand brake signal	With a signal / no signal	Displays the status of the handbrake signal: With a signal indicates with a handbrake signal No signal indicates no handbrake signal
Instant charging switch signal (current status belongs to trigger signal)	Enable / disable	Displays immediate charge switch signal status Enable indicates the immediate charge switch is pressed Disable indicates the immediate charge switch is not pressed
VCU failure	Normal / failure	Display VCU current status that VCU sends to PCU: Normal indicates VCU is normal Failure indicates VCU is failed
High voltage interlocking state	Normal / fault	Displays the high voltage interlock signal status: Normal indicates that the high voltage interlock signal is normal Fault indicates that the high voltage interlock signal is faulty
M/C relay enable	Enable / disable	Displays the status of the VCU control MC relay command: Enable indicates that the MC relay is engaged Disable indicates that the MC relay is disconnected
AC relay enable	Enable / disable	Displays the status of the VCU control AC relay command: Enable indicates that the AC relay is engaged Disable indicates that the AC relay is disconnected
High voltage main relay enable	Enable / disable	Displays the status of the VCU control high voltage main relay command: Enable indicates that the high voltage main relay is engaged Disable indicates that the high voltage main relay is disconnected
High voltage main negative relay enable	Enable / disable	Displays the status of the VCU control high voltage main negative relay command: Enable indicates that the high voltage main negative relay is engaged Disable indicates that the high voltage main negative relay is disconnected
High voltage pre-charge relay enable	Enable / disable	Displays the status of the VCU control high voltage pre-charge relay command: Enable indicates that the high voltage pre-charge relay is engaged Disable indicates that the high voltage pre-charge relay is disconnected
Direct charge relay enabled	Enable / disable	Displays the status of the VCU control direct charge relay command: Enable indicates that the direct charge relay is engaged Disable indicates that the direct charge relay is disconnected
VCU mode	OFF_MODE/ STAND_BY_MODE/NORMAL_MODE/AC_CHARGE_MODE/DC_CHARGE_MODE/FAILSAFE_MODE	Display VCU operating mode: OFF_MODE indicates power down mode STAND_BY_MODE indicates the wait mode NORMAL_MODE indicates normal mode AC_CHARGE_MODE indicates the AC charging mode DC_CHARGE_MODE indicates the DC charging mode FAILSAFE_MODE Indicates the failure mode
VCU_Sub1_1	STANDBY_MODE/POWERED_MODE/POWERDOWN_MODE	Displays the status of VCU sub mode 1_1: STANDBY_MODE indicates the wait mode POWERED_MODE indicates power-up mode POWERDOWN_MODE indicates power down process mode
VCU_Sub2_1	POWERUP_MODE/READY_MODE/RUN_MODE	Displays the status of VCU sub mode 2_1: POWERDOWN_MODE indicates power up process mode READY_MODE indicates READY tripable mode RUN_MODE indicates the operating mode
VCU_Sub1_2	AC_CHARGE_POWERUP_MODE/AC_CHARGE_PROCESS_MODE/AC_CHARGE_POWERDOWN_MOD	Displays the status of VCU sub mode 1_2: AC_CHARGE_POWERUP_MODE indicates the AC charging wait mode AC_CHARGE_PROCESS_MODE indicates the AC charging process mode AC_CHARGE_POWERDOWN_MODE indicates the AC charging power down mode
VCU_Sub1_3	DC_CHARGE_POWERUP_MODE/DC_CHARGE_PROCESS_MODE/DC_CHARGE_POWERDOWN_MOD	Displays the status of VCU sub mode 1_3: DC_CHARGE_POWERUP_MODE indicates the DC charging wait mode DC_CHARGE_PROCESS_MODE indicates the DC charging process mode DC_CHARGE_POWERDOWN_MODE indicates the DC charging power down mode
VCU_Sub1_4	REMOTE_INQUIRE_MODE/REMOTE_AIR_CONTROL_MODE/REMOTE_CHARGE_MODE/REMOTE_POWERDOWN_MODE	Displays the status of VCU sub mode 1_4: REMOTE_INQUIRE_MODE indicates the remote query mode REMOTE_AIR_CONTROL_MODE indicates the remote air conditioner mode REMOTE_CHARGE_MODE indicates the remote charging mode REMOTE_POWERDOWN_MODE Indicates the remote power down mode
SOC	%	Display power battery status with range 0% to 100%
SOE	%	Displays the proportion of the remaining energy of the power battery with the range of 0% to 100%
SOH	%	Display power battery life status with range 0% to 100%
Reference residual mileage	Km	Displays the remaining mileage that the current vehicle can refer to
AC ON remaining mileage	Km	Displays VCU sent to the T-BOX if the air conditioning is turned on, the vehicle remaining mileage, the range is 0 ~ 150KM
AC OFF remaining mileage	Km	Displays VCU sent to the T-BOX if the air conditioning is turned off, the vehicle remaining mileage, the range is 0 ~ 150Km
Remote wake-up command	Enable / disable	Displays the status of the remote wake-up signal: Enable indicates there is a remote wake-up signal Disable indicates there is no remote wake-up signal
Remote charging command	Initial value / reserved / remote charging request / no remote charging request	Displays that the T-BOX sends the command to the VCU after receiving the remote charging request sent by the owner: The initial value represents the default value for initialization Reserved means that the value is reserved Remote charging request indicates that the owner has a remote charging request No remote charging request indicates that the owner has no remote charging request
Remote air conditioner command	Initial value / reserved / remote air conditioner request / no remote air conditioner request	Displays that the T-BOX sends the command to the VCU after receiving the remote air conditioner request sent by the owner: The initial value represents the default value for initialization Reserved means that the value is reserved No remote air conditioner request indicates that the owner has no remote air conditioner request Remote air conditioner request indicates that the owner has Remote air conditioner request
12V battery charging command	Initial value / no charging command / charging command / reserved	Displays when the vehicle is stationary for 60 hours, T-BOX automatically wakes up, sends the flag to the VCU, requires VCU to charge the lead-acid battery: The initial value represents the default value for initialization No charging command indicates no 12V battery charging command Charging command indicates there is 12V battery charging command Reserved means that the value is reserved
Remote read vehicle status request	Initial value / reserved / remote read vehicle status request / no remote read vehicle status request	Displays that the T-BOX sends the command to the VCU after receiving the remote read vehicle status request sent by the owner: The initial value represents the default value for initialization Reserved means that the value is reserved Remote read vehicle status request indicates that the owner sends a remote query request No remote read vehicle status request indicates that the owner does not send a remote query request
Remote operation status	Initial value / remote operation process / VCU remote operation end	Displays the current remote operating status of the VCU after receiving the remote request sent by T-BOX: The initial value represents the default value for initialization The remote operation indicates that a remote operation is being performed VCU remote operation end indicates VCU feedback remote operation end
Remote air conditioning status	Initial value / on / fault and turn off / off	Displays remote air conditioning current working status VCU sent to the T-BOX : The initial value represents the default value for initialization On indicates that the air conditioner is on Fault and off indicates that the air conditioner is faulty and off Off indicates that the air conditioner is off
Charge plug status	Not inserted / inserted not charged / charged / other	Displays the status of the charging cable that the VCU sends to the T-BOX: Not inserted indicates that the charger plug is not inserted; Inserted not charged indicates that the charger plug is inserted, but not charged; Charged indicates that the charger plug is inserted and charged; Other indicates the reserved
Remote charging status	Initial value / on / fault and turn off / off	Displays remote charging current working status VCU sent to the T-BOX : The initial value represents the default value for initialization On indicates that charging starts Faulty and off indicates a charging fault and is turned off Off indicates the charging is turned off
Remote air conditioning demand temperature	°C	Displays that the T-BOX receives the remote air-conditioning request sent by the owner, sends the air conditioner temperature command set by the owner to the VCU, the temperature range is 0 ~ 30 ° C
VCU power down command bit	Initial value / power down command	Displays the command whether to end the remote operation that VCU sends to the T-BOX : The initial value represents the default value for initialization Power down command indicates that the VCU has a power down command Other indicates the reserved
Motor target torque	Nm	Displays the target torque command sent by the VCU to the motor
Motor actual torque	Nm	Displays the actual torque output of the motor
Motor actual speed	rpm	Displays the actual speed of the motor
High voltage power state	High voltage power on complete / no high voltage power on	Displays high voltage power on status VCU sent: High voltage power on complete indicates the high voltage power on is completed No high voltage power on indicates the high voltage power on is not completed
Motor controller IGBT temperature	℃	Displays the temperature of the motor controller IGBT with the range of -40 ° C to 210 ° C
Motor controller temperature	℃	Displays the temperature of the motor controller with the range of -40 ° C to 210 ° C
Motor temperature	℃	Displays the temperature of the motor with the range of -40 ° C to 210 ° C
TM motor IGBT command	Gate ON/ Gate OFF	Displays TM motor IGBT command that VCU sent: Gate ON indicates that the VCU is sent command to the IGBT Gate OFF indicates that the VCU is sent OFF command to the IGBT
IGBT state	Gate ON/ Gate OFF	Display TM motor current IGBT command: Gate ON indicates that the IGBT is currently operating Gate OFF indicates that the IGBT is currently cut off
TM motor current steering command	Idle / forward / reverse	Displays the current steering command sent by the VCU to the motor: Idle indicates that the VCU is sent idle command to the motor Forward indicates that the VCU is sent forward command to the motor Reverse indicates that the VCU is sent reverse command to the motor
Motor current steering command	Idle / forward / backward / reserved	Displays the current actual steering of the motor: Idle indicates that the motor idles Forward indicates that the motor is forward Reverse indicates that the motor is backward Reserved indicates the reservation
TM motor bus voltage value	V	Displays TM bus voltage value
Power battery voltage	V	Displays the current voltage of the power battery
Power battery current	A	Displays the current value of the power battery
Maximum single cell voltage	mV	Displays power battery maximum single cell voltage
Minimum single cell voltage	mV	Displays power battery minimum single cell voltage
Minimum single cell temperature	℃	Displays power battery maximum temperature
Maximum single cell temperature	℃	Displays power battery minimum temperature
Power Battery No. 1 sensor sensitivity temperature	°C	Displays the temperature value collected by the No.1 temperature sensor in the BMS
Power Battery No. 2 sensor sensitivity temperature	°C	Displays the temperature value collected by the No.2 temperature sensor in the BMS
Power Battery No. 3 sensor sensitivity temperature	°C	Displays the temperature value collected by the No.3 temperature sensor in the BMS
Minimum temperature sensitivity of power battery	—	Displays the minimum temperature sensor temperature of the battery sent by the BMS to the VCU, with the range of 0 to 15
Maximum temperature sensitivity of power battery	—	Displays the maximum temperature sensor temperature of the battery sent by the BMS to the VCU, with the range of 0 to 15
Maximum single cell voltage cell number	—	Display battery cell number corresponding to the maximum cell voltage
Minimum single cell voltage cell number	—	Display battery cell number corresponding to the minimum cell voltage
Maximum battery cell internal resistance	Milliehm	Displays maximum internal resistance of the battery cell, with the resistance range from 0 to 25.5 milliohms
Battery pack internal resistance	Milliehm	Displays the internal resistance of the battery pack, with the resistance range from 0 ~ 2550.0 milliohms
Insulation resistance	Megohm	Displays the insulation resistance of the high voltage circuit
Battery thermal management operation mode	Charge heating / charge slow-cooling / ambient charge / discharge precooling / discharge cooling / ambient discharge / charge preheating / charge fast-cooling / winter preheating	Displays the operating mode of the battery thermal management VCU sent to MP5: Charge heating indicates that the battery thermal management mode is charge heating mode; charge slow-cooling indicates that the battery thermal management mode is charge slow-cooling mode; Ambient charge indicates that the battery thermal management mode is ambient charge mode; Discharge precooling indicates that the battery thermal management mode is discharge precooling mode; Discharge cooling indicates that the battery thermal management mode is discharge cooling mode; Ambient discharge indicates that the battery thermal management mode is ambient discharge mode; Charge preheating indicates that the battery thermal management mode is charge preheating mode; charge fast-cooling indicates that the battery thermal management mode is charge fast-cooling mode; Winter preheating indicates that the battery thermal management mode is winter preheating mode;
Charging ampere-hour	AH	Displays power battery cumulative charge Ann hours
Discharging ampere-hour	AH	Displays power battery cumulative discharge Ann hours
Release energy	WH	Displays power battery cumulative release energy
Charged energy	WH	Displays power battery cumulative charged energy
BMS operation mode	Default / run / hibernate / fault	Displays the BMS operation mode Default indicates the default value Run indicates that the BMS is in run mode Dormant indicates that BMS is in dormant mode Fault indicates that the BMS is in fault mode
Hardware fault status bit	Initialization success/hardware fault false positives	Displays the hardware fault line status bits that the BMS sends to VCU: initialization success indicates that the BMS hardware fault line can be trusted false hardware fault indicates that BMS hardware fault line is unreliable Other indicates the BMS hardware fault line is unreliable
Battery evaporator solenoid valve command	ON/ OFF	Displays the battery evaporator solenoid valve command VCU sent: ON indicates that VCU sends turn-on command to battery evaporator solenoid valve OFF indicates that VCU sends turn-off command to battery evaporator solenoid valve Other indicates the reserved
Battery steam solenoid valve status	ON/ OFF	Displays the battery evaporator solenoid valve status that AC compressor sent: ON indicates that the battery evaporator solenoid valve is on OFF indicates that the battery evaporator solenoid valve is off Other indicates the reserved
The remote crew cabin evaporator open command	ON/ OFF	Displays the crew cabin evaporator open command sent by the VCU: ON indicates that the crew cabin evaporator is on OFF indicates that the crew cabin evaporator is off Other indicates the reserved
Air conditioning crew cabin evaporator solenoid valve status	ON/ OFF	Displays crew cabin evaporator solenoid valve status that air conditioning compressor feedback to the VCU: ON indicates that the crew cabin evaporator solenoid valve is on OFF indicates that the crew cabin evaporator solenoid valve is off Other indicates the reserved
Condenser fan request	OFF / low grade/ high grade	Displays the condenser fan’s speed request sent by the compressor controller to the VCU: OFF indicates that the condenser fan’s request is off Low grade indicates that the condenser fan’s request is in low mode High grade indicates that the condenser fan’s request is in high mode
Blower operating status	ON/ OFF	Displays the blower running status that sent by the air conditioner panel : On indicates that the blower is on Off indicates that the blower is off
Battery evaporator temperature	°C	Displays the temperature at which the battery sends the cooling temperature to the battery evaporator in the range -40 ° C to 125 ° C
Battery PTC temperature	°C	Displays the temperature at which the battery sends the cooling temperature to the PTC in the range -40 ° C to 125 ° C
Battery cooling temperature demand	°C	Displays the battery cooling temperature requirements sent by the VCU to the compressor, in the range -40 ° C to 125 ° C
No open the solenoid valve	Allow/Prohibit	Displays no open the crew cabinet solenoid and PTC command that VCU sends to compressor controller: Allow indicates the passenger compartment allow the solenoid valve and PTC to open Prohibit indicates the passenger compartment not allow the solenoid valve and PTC to open Other indicates the reserved
Battery fan ON command 1	Fan on / fan off	Displays battery fan 1’s turn-on command sent by VCU to the BMS: Fan on indicates that the VCU sends the fan 1 open command Fan off indicates that the VCU sends the fan 1 off command Other indicates the reserved
Battery fan ON command 2	Fan on / fan off	Displays battery fan 2’s turn-on command sent by VCU to the BMS: Fan on indicates that the VCU sends the fan 2 open command Fan off indicates that the VCU sends the fan 2 off command Other indicates the reserved
Battery fan flag	Fan off / Fan 1 On / Fan 2 On / Fan 1 and Fan 2 are on at the same time	Displays the switch status of the battery fans 1 and 2 fed back to the VCU by the BMS: Fan off indicates that the fan 1 and fan 2 are off Fan 1 on indicates that the fan 1 is on Fan 2 on indicates that the fan 2 is on Fan 1 and Fan 2 are on at the same time indicates fan 1 and fan 2 are on at the same time
Battery PTC open command	Heater on / heater off	Displays battery PTC open command that VCU sent to the BMS: Heater on indicates that the VCU requests battery PTC to turn on Heater off indicates that the VCU requests battery PTC to turn off Other indicates the reserved
Battery PTC working status	Heater on / heater off	Displays the switch status of the battery PTC fed back to the VCU by the BMS: Heater on indicates that the battery PTC is currently on Heater off indicates that the battery PTC is currently off Other indicates the reserved
AC charge wake-up signal	Enable / disable	Displays the status of the AC charge wake-up signal: Enable indicates there is a AC charge wake-up signal Disable indicates there is no AC charge wake-up signal
AC high voltage side output current	A	Displays the output current value of the high voltage side of the charger
AC charging current command	A	Displays AC charging current value that VCU sent to charger
AC high voltage side output voltage value	V	Displays the output voltage value of the high voltage side of the charger
AC charging maximum allowable charge voltage	V	Displays AC charging maximum allowable charge voltage that VCU sent to charger
AC charging remaining time	Minute	Displays the time required that the VCU send to the T-BOX, based on the current remaining power with AC charging mode in the range of 0-1000 minutes
AC charging stop charging command	Allow charge / stop charge	Displays AC charging stop command that VCU sent to charger: Charge allowed indicates charger’s charging process is available Stop charging indicates stopping the charger to charge
AC charger status	Charger stand by/charging operation/shut down	Displays charger current operating status: charger stand by indicates that the charger is in charging complete mode, but the plug is unplugged charging operation indicates that the charger is in charging mode shut down indicates that the charger is in charging off mode
DC charge wake-up signal	Enable / disable	Displays the status of the DC wake-up signal: Enable indicates there is a DC charge wake-up signal Disable indicates there is no DC charge wake-up signal
DC charge on command	ON/ OFF	Displays DC charging on command VCU sent to the charging pile : ON indicates that the VCU sends turn-on command to the charging pile OFF indicates that the VCU sends turn-off command to the charging pile
DC charging current command	A	Displays DC charging current value that VCU sent to charging pile
DC charging maximum allowable charge voltage	V	Displays DC charging maximum allowable charge voltage that VCU sent to charging pile
DC high voltage side output voltage value	V	Displays the output voltage value of the high voltage side of the charging pile
DC high voltage side output current	A	Displays the output current value of the high voltage side of the charging pile
DC charge full flag	Full / not full	Displays the DC charge full flag that VCU sent: Full indicates that VCU sends DC charging is full Not full indicates that VCU sends DC charging is not full
DC charger status	Charger stand by/charging operation/shut down	Displays the DC charge pile working status: charger stand by indicates that the charge pile is in charging complete mode, but the plug is unplugged charging operation indicates that the charge pile is in charging mode shut down indicates that the charge pile is in charging off mode
DC charging remaining time	Minute	Displays the time required that the VCU send to the T-BOX, based on the current remaining power with DC charging mode in the range of 0-1000 minutes
AC charger operating temperature	℃	Displays charger operating temperature in a range -40-210 ℃
Air conditioning limit power command (%)	%	Displays the percentage of VCU sent to the air conditioner limit power command
Prohibit compressor start command	Allow/Prohibit	Displays prohibit start command VCU sent to compressor : Allow indicates that the VCU sends a compressor start allow command Prohibit indicates that the VCU sends a compressor start prohibit command Other indicates the reserved
Environment temperature	℃	Displays the ambient temperature detected by the air conditioning controller
User demand temperature	°C	Display the user request temperature that air conditioner panel controller sent to the compressor: Temperature range is from 16 ° C to 32 ° C, other reserved
Interior temperature	°C	Displays the Interior temperature values sent by the air panel, in the range of -30 ° C to 50 ° C
Compressor working status	ON/ OFF	Displays the compressor working status that air conditioning compressor feedback to the VCU: On indicates that the compressor is on Off indicates that the compressor is off Other indicates the reserved
Compressor speed	rpm	Displays the compressor speed that air conditioning compressor feedback: The range is 0 ~ 4500; other reserved
A/C system normal	Fault / no fault	Display system operating status sent by compressor : Fault indicates that the compressor system is faulty No fault indicates that the compressor system is not faulty
Air conditioner command	Invalid / defrost / effect	Display the user request command for the air conditioning panel: Invalid indicates that the user request command is invalid Defrost indicates that the user request command is defrost Effect indicates that the user request command is effect Other indicates the reserved
The passenger air flow limit command	Off / 1/2/3/4/5/6/7 / other	Displays the passenger compartment blower air flow limit command that VCU sent to the air conditioning panel controller : Off indicates the blower is turned off 1 indicates that the blower air flow request is 1 grade; 2 indicates that the blower air flow request is 2 grade; 3 indicates that the blower air flow request is 3 grade; 4 indicates that the blower air flow request is 4 grade; 5 indicates that the blower air flow request is 5 grade; 6 indicates that the blower air flow request is 6 grade; 7 indicates that the blower air flow request is 7 grade; Other indicates the reserved
Compressor motor missing phase	Fault / no fault	Displays compressor motor missing phase status: Fault indicates that the compressor motor is missing phase No fault indicates that the compressor motor is not missing phase
The air conditioning controller output overload	Fault / no fault	Displays the air conditioning controller output overload status: Fault indicates that the air conditioner controller has output overload fault No fault indicates that the air conditioner controller not has output overload fault
Air conditioning controller overheat	Fault / no fault	Displays the air conditioning controller overheat status: Fault indicates that the air conditioner controller has overheat fault No fault indicates that the air conditioner controller not has overheat fault
The air conditioning controller output short circuit	Fault / no fault	Displays the air conditioning controller output short circuit status: Fault indicates that the air conditioner controller has output short circuit fault No fault indicates that the air conditioner controller not has output short circuit fault
Air conditioning input DC undervoltage	Fault / no fault	Displays air conditioning input DC undervoltage (<= 200V) status: Fault indicates that there is an air conditioner input DC undervoltage fault No fault indicates that there is no air conditioner input DC undervoltage fault
Air conditioning input DC overvoltage	Fault / no fault	Displays air conditioning input DC overvoltage (<= 400V) status: Fault indicates that there is an air conditioner input DC overvoltage fault No fault indicates that there is no air conditioner input DC overvoltage fault
Rear defrost state	Invalid / valid	Displays the status of AC panel control rear defrost Invalid indicates that the defrost function is invalid Valid indicates that the defrost function is valid Other indicates the reserved
PTC on status	—	Displays the PTC open status command sent by the air conditioning panel controller: 0 indicates invalid; 1 indicates that PTC is on 1; 2 indicates that PTC is on 2;
Whether ABS is working	Work / no work	Displays ABS report whether is currently working: Work indicates that ABS is in working condition No work indicates that ABS is not in working condition
Whether ABS is operating properly	Normal / fault	Displays whether ABS is operating properly Normal indicates ABS is operating normally Fault indicates ABS is faulty
Whether EBD is operating properly	Normal / fault	Displays whether EBD is operating properly Normal indicates EBD is operating normally Fault indicates EBD is faulty
Motor controller fault code	—	Displays the current fault code reported by the motor controller with a range of 0 to 255
Battery management system fault code	—	Displays the current fault code reported by the battery management system with a range of 0 to 255
Vehicle control system fault code	—	Displays the current fault code reported by the vehicle controller with a range of 0 to 255
Charger fault	—	Displays the current fault code reported by the charger with a range of 0 to 255

VCU diagnostic information

Reference value

The value displayed in the diagnostic tool

Note:

Memo data as the reference value;

As part of the display value is collected by the VCU sensor signal and obtained through the calculation, so it has difference with the actual signal, parameters and operation.

Monitoring projects	Condition		value/status
Vehicle speed	Turn the drive wheel and compare the meter tachometer indication value		And is basically the same as the instrument tachometer
Mileage	Key is at ON		0~16777215
12V battery voltage	Key is at ON		13 – 15 V
	READY		13 – 15 V
5V power supply filtering	Key is at ON		0-5V
Key state	The key at "LOCK" or pull out;		Key off
	Key is at ON		KEY ON
	The key is rotated to "START"		Key start
Gear position	Key is at ON	Shift lever: R	R
		Shift lever: N	N
		Shift lever: D or S	D
Water pump PWM	The key at "LOCK" or pull out;	Water pump stop working	10%
	Key is at ON	Water pump speed 1000~5000rpm	30%-98%
	READY	Water pump speed 1000~5000rpm	30%-98%
	DC charge	Water pump speed 400~5000rpm	20%-98%
	AC charge	Water pump speed 0~5000rpm	10%-98%
Fan PWM	The key at "LOCK" or pull out;	Fan stop working	0%
	Key is at ON	Fan speed 0~2400rpm	0-100%
	READY	Fan speed 0~2400rpm	0-100%
	DC charge	Fan speed 0~2400rpm	0-100%
	AC charge	Fan speed 0~2400rpm	0-100%
Brake switch state	Brake pedal: pressed		No brake
	Brake pedal: released		Brake
Brake light status	Brake pedal: released		No brake
	Brake pedal: pressed		Brake
Accelerator pedal 1 opening	Key is at ON	Accelerator pedal: pressed totally	95%-100%
		Accelerator pedal: released totally	0%-5%
Accelerator pedal 2 opening	Key is at ON	Accelerator pedal: pressed totally	95%-100%
		Accelerator pedal: released totally	0%-5%
Brake pedal 1 opening	Key is at ON	Brake pedal: pressed totally	95%-100%
		Brake pedal: released	0%-5%
Brake pedal 2 opening	Key is at ON	Brake pedal: pressed totally	95%-100%
		Brake pedal: released	0%-5%
Coolant temperature	Vehicle READY 2 minutes later		-40-210°C
SSO enabled	Power down process: ON → OFF		Enable
	Other		Disable
S-mode switch	S-mode switch is unpressed		None
	S-mode switch is pressed		Yes
DCDC hardwired enabled	The key at "LOCK" or pull out; Power down process: ON → OFF		Disable
	Key is at ON		Enable
Handbrake signal	Handbrake released		Handbrake down
	Handbrake up		Handbrake up
Immediate charge switch signal	Key is at ON	The immediate charge switch: pressed	ON
		The immediate charge switch: released	OFF
VCU failure	VCU operation is normal		Normal
	VCU operation is abnormal		Failure
High voltage interlocking state	The high voltage interlock signal is normal		Normal
	The high voltage interlock signal is faulty		Malfunction
M/C relay enable	READY		Engaged
	Key is at ON		Engaged
	The key at "LOCK" or pull out;		Cut off
AC relay enable	READY		Engaged
	Key is at ON		Engaged
	The key at "LOCK" or pull out;		Cut off
High voltage main relay enable	READY		Engaged
	Key is at ON		Engaged
	The key at "LOCK" or pull out;		Cut off
High voltage main negative relay enable	READY		Engaged
	Key is at ON		Engaged
	The key at "LOCK" or pull out;		Cut off
High voltage pre-charge relay enable	READY		Engaged
	Key is at ON		Engaged
	The key at "LOCK" or pull out;		Cut off
Direct charge relay enabled	DC status		Engaged
	Other		Cut off
VCU mode	Remote query		STAND_BY_MODE
	Key is at ON		NORMAL_MODE
	AC charge		AC_CHARGE_MODE
	DC charge		DC_CHARGE_MODE
VCU_Sub1_1	Key is at ON		STANDBY_MODE
	Key is at ON		POWERED_MODE
	The key at "LOCK" or pull out;		POWERDOWN_MODE
VCU_Sub2_1	Key is at ON		POWERUP_MODE
	READY		READY_MODE
	READY, and in the D gear or R gear		RUN_MODE
VCU_Sub1_2	AC charging gun inserted		AC_CHARGE_POWERUP_MODE
	AC charging gun inserted		AC_CHARGE_PROCESS_MODE
	AC charging gun unplugged		AC_CHARGE_POWERDOWN_MODE
VCU_Sub1_3	DC charging gun inserted		DC_CHARGE_POWERUP_MODE
	DC charging gun inserted		DC_CHARGE_PROCESS_MODE
	DC charging gun unplugged		DC_CHARGE_POWERDOWN_MODE
VCU_Sub1_4	Remote query		REMOTE_INQUIRE_MODE
	Remote air conditioner control		REMOTE_AIR_CONTROL_MODE
	Remote charging control		REMOTE_CHARGE_MODE
	Remote operation end		REMOTE_POWERDOWN_MODE
SOC	Key is at ON		0-100%
	Charging status		0-100%
SOE	Key is at ON		0-100%
	Charging status		0-100%
SOH	Key is at ON		0-100%
	Charging status		0-100%
Reference residual mileage	Key is at ON		0～180km
AC ON remaining mileage	Air conditioning on		0～-150km
AC OFF remaining mileage	Air conditioning off		0～-150km
Remote wake-up command	Remote operation		Enable
	No remote operation		Disable
Remote charging request	No remote charging request		2
	Remote charging request		3
Remote air conditioner request	No remote air conditioner request		2
	Remote air conditioner request		3
Winter pre-heating request	Winter pre-heating request available (instant turn-on)		2
	Winter pre-heating request available (not instant turn-on)		1
	Winter pre-heating request unavailable		0
12V battery charging command	Without vehicle stationary for 60 hours		1
	Vehicle stationary for 60 hours		2
Remote read vehicle status request	No remote read vehicle data request		2
	Remote read vehicle data request		3
Remote operation status	Remote operation		Remote operation process
	Remote operation complete		Remote operation end
Remote air conditioning status	Remote air conditioning is successful		Remote air conditioning on
	Remote air conditioning is completed		Remote air conditioning off
Charge plug status	Charging gun unplugged		The charger plug is not inserted
	Charging gun inserted		The charger plug is inserted but not charging
	Charging gun inserted		The charger plug is inserted and charging
Remote charging status	Charging gun inserted		Charging completed, plug unplugged
	Charger plug inserted		Charging process
	Charger unplugged		OFF
Remote air conditioning demand temperature	Remote air conditioning on		0-30°C
VCU power down command bit	Remote operation end		Power down command
	Other		Other
Motor target torque	READY		0-215Nm
Motor actual torque	READY		0-215Nm Based on the accelerator pedal opening
Motor actual speed	Speed is 0 km/h		0rpm
	Speed is 60km/h		3600rpm (around)
High voltage power state	No high voltage power on		No high voltage power on
	High voltage power on completed		High voltage power on completed
Motor controller IGBT temperature	Key is at ON		-40-210℃
Motor controller temperature	Key is at ON		-40-210℃
Motor temperature	Key is at ON		-40-210℃
PCU IGBT command	VCU sends IGBT off command		Gate OFF
	VCU sends IGBT on command		Gate ON
IGBT state	Actual operating status of PCU IGBT		Gate OFF (refer to PCU IGBT command)
	Actual operating status of PCU IGBT		Gate ON (refer to PCU IGBT command)
TM motor current steering command	READY, and in the D gear		Forward
	READY, and in the R gear		Backward
Motor current steering	The drive wheel rotates forward		Forward
	The drive wheel rotates backward		Backward
TM motor bus voltage value	Key is at ON		0-1003.98V
Power battery voltage	Key is at ON		276-377.2V
Power battery current	READY Electrical load: no load		0-10A
Maximum single cell voltage	Key is at ON		0-5000mv
	Charging status		0-5000mv
Minimum single cell voltage	Key is at ON		0-5000mv
	Charging status		0-5000mv
Minimum single cell temperature	Key is at ON		-40-125°C
	Charging status		-40-125°C
Maximum single cell temperature	Key is at ON		-40-125°C
	Charging status		-40-125°C
Power Battery No. 1 sensor sensitivity temperature	Key is at ON		-40-125°C
Power Battery No. 2 sensor sensitivity temperature	Key is at ON		-40-125°C
Power Battery No. 3 sensor sensitivity temperature	Key is at ON		-40-125°C
Minimum temperature sensor number of power battery	Key is at ON		0-15
Maximum temperature sensor number of power battery	Key is at ON		0-15
Maximum single cell voltage cell number	Key is at ON		0-92
	Charging status		0-92
Minimum single cell voltage cell number	Key is at ON		0-92
	Charging status		0-92
Maximum battery cell internal resistance	Key is at ON		0-255mΩ
Battery pack internal resistance	Key is at ON		0-2550mΩ
Insulation resistance	Key is at ON		0~650MΩ
	Charging status		0~650MΩ
Battery thermal management operation mode	Charging status		Charging slow-cooling
	Charging state		Normal-temperature charge
	READY		Discharging cooling
	READY		Normal-temperature discharge
	READY		Charging precooling
	Charging state		Charging fast-cooling
	Charging state		Charging preheat
	Charging status		Charging heating
Charging ampere-hour	Charging status		0-70Ah
Discharging ampere-hour	Key is at ON		0-70Ah
Release energy	Key is at ON		0-24kwh
Charged energy	Charging status		0-24kwh
Battery controller operating mode	Power on process: OFF → ON Charge power on process: OFF → ON		Initialization
	Key is at ON/ charge status		Operating
Hardware fault status bit	BMS hardware fault line trusted		Initialization successful
	BMS hardware failure line is not trusted		Hardware failure false positives
Battery evaporator solenoid valve command	According to the battery thermal management mode		OFF
	According to the battery thermal management mode		ON
Battery steam solenoid valve status	According to the battery thermal management mode		OFF
	According to the battery thermal management mode		ON
The remote crew cabin evaporator open command	No remote air conditioning refrigeration request		OFF
	Remote air conditioning refrigeration request		ON
Air conditioning crew cabin evaporator solenoid valve status	No remote air conditioning refrigeration command		OFF
	Remote air conditioning refrigeration command		ON
Condenser fan request	Air conditioning not on		OFF
	Air conditioning on		Low grade/ high grade
Blower operating status	MP5 air volume is not turned on		OFF
	MP5 air volume is turned on		ON
Battery evaporator temperature	Key is at ON		-40-125°C
	Charging status		-40-125°C
Battery PTC temperature	Key is at ON		-40-125°C
	Charging status		-40-125°C
Battery cooling temperature demand	Key is at ON		-40-125°C
No open the solenoid valve	Charging state, the battery cell voltage is low		OFF
	Other		ON
Status of chiller solenoid valve	According to the battery thermal management mode		ON
	According to the battery thermal management mode		OFF
Duty cycle of battery’s water pump	Rotating speed of battery’s water pump is 0~4000rpm		0-100%
Battery PTC open command	According to the battery thermal management mode		ON
	According to the battery thermal management mode		OFF
Battery PTC working status	According to the battery PTC open command		ON
	According to the battery PTC open command		OFF
AC charge wake-up signal	AC charging gun inserted		Enable
	AC charging gun unplugged		Disable
AC high voltage side output current	AC charging status		0-10A
AC charging current command	AC charging status		0-10A
AC high voltage side output voltage value	AC charging status		276-377.2V
AC charging maximum allowable charge voltage	Long-distance charging mode		388V
	Normal charging mode		384V
	Long-lifespan charging mode		384V
	Low temperature charging mode		384V
AC charging remaining time	AC charge		0-1000 minutes
AC charging stop charging command	AC charging gun unplugged		Stop charging
	AC charger inserted		Charge allowable
DC charge wake-up signal	DC charging gun inserted		Enable
	DC charging gun unplugged		Disable
DC charge on command	DC charging gun unplugged		Stop charging
	DC charger inserted		Charge allowable
DC charging current command	DC charger status		0-35A
DC charging maximum allowable charge voltage	DC charger status		384V
DC high voltage side output voltage value	DC charger status		0-750V
DC high voltage side output current	DC charger status		0-400A
DC charge full flag	DC charge end		Charge full
	DC charging status		Not charging full
DC charging remaining time	DC charge		0-1000 minutes
AC charger operating temperature	Charging status		-40-210℃
Air conditioning limit power command (%)	Key is at ON		0-100%
Prohibit compressor start command	Power down process: ON → OFF		Not start
	Key is at ON		Start
	READY		Start
Environment temperature	Key is at ON		Displays based on the current ambient temperature
User demand temperature	Air conditioning on		16-32°C
Interior temperature	Key is at ON		-40-125°C
Compressor working status	Key is at ON		OFF
	READY	Air conditioning not on	OFF
		Air conditioning on	ON
Compressor speed	Key is at ON		0
	READY	Air conditioning not on	0
		Air conditioning on	0-4500
A/C system normal	Normal		No fault
	Fault		There is fault
Air conditioner command	There is air conditioning defrost request		Defrosting
	No air conditioning defrost request		Valid / invalid
The passenger air flow limit command	No air flow command		OFF
	The air volume request is 1 grade		1
	The air volume request is 2 grade		2
	The air volume request is 3 grade		3
	The air volume request is 4 grade		4
	The air volume request is 5 grade		5
	The air volume request is 6 grade		6
	The air volume request is 7 grade		7
Compressor motor missing phase	Normal		No fault
	Fault		There is fault
The air conditioning controller output overload	Normal		No fault
	Fault		There is fault
Air conditioning controller overheat	Normal		No fault
	Fault		There is fault
The air conditioning controller output short circuit	Normal		No fault
	Fault		There is fault
Air conditioning input DC undervoltage	Normal		No fault
	Fault		There is fault
Air conditioning input DC overvoltage	Normal		No fault
	Fault		There is fault
Rear defrost state	Rear defrost operation: operate		ON
	Rear defrost operation: no operate		OFF
PTC on status	Air conditioning heating is not on		Invalid
	Air conditioning heating is on		PTC 1 grade is on
	Air conditioning heating is on		PTC 2 grade is on
Whether ABS is working	Not using		Inactive
	Using		Active
Whether ABS is operating properly	Normal		ABS Normal
	Malfunction		ABS Failed
Whether EBD is operating properly	Normal		EBD Normal
	Malfunction		EBD Failed
Motor controller fault code	Key is at ON		0-255
Motor controller fault code	Key is at ON		0-255
	Charging		0-255
Vehicle control system fault code	Key is at ON		0-255
	Charging		0-255
Charger fault code	Charging		0-255
Monitoring subject	Condition		value/status
Vehicle speed	Turn the drive wheel and compare the meter tachometer indication value		And is basically the same as the instrument tachometer
12V battery voltage	Key is at ON		13 – 15 V
	READY		13 – 15 V
5V power supply filtering	Key is at ON		0-5V
Key state	The key at "LOCK" or pull out;		Key off
	Key is at ON		KEY ON
	The key is rotated to "START"		Key start
Gear position	Key is at ON	Shift lever: R	R
		Shift lever: N	N
		Shift lever: D or S	D
Water pump PWM	The key at "LOCK" or pull out;	Water pump stop working	10%
	Key is at ON	Water pump speed 1000~5000rpm	30%-98%
	READY	Water pump speed 1000~5000rpm	30%-98%
	DC charging	Water pump speed 400~5000rpm	20%-98%
	Slow charging	Water pump speed 0~5000rpm	10%-98%
Fan PWM	The key at "LOCK" or pull out;	Fan stop working	0%
	Key is at ON	Fan speed 0~2400rpm	0-100%
	READY	Fan speed 0~2400rpm	0-100%
	DC charging	Fan speed 0~2400rpm	0-100%
	Slow charging	Fan speed 0~2400rpm	0-100%
Brake switch state	Brake pedal: pressed		No brake
	Brake pedal: released		Brake
Brake light status	Brake pedal: released		No brake
	Brake pedal: pressed		Brake
Accelerator pedal 1 opening	Key is at ON	Accelerator pedal: pressed totally	95%-100%
		Accelerator pedal: released totally	0%-5%
Accelerator pedal 2 opening	Key is at ON	Accelerator pedal: pressed totally	95%-100%
		Accelerator pedal: released totally	0%-5%
Brake pedal 1 opening	Key is at ON	Brake pedal: pressed totally	95%-100%
		Brake pedal: released	0%-5%
Brake pedal 2 opening	Key is at ON	Brake pedal: pressed totally	95%-100%
		Brake pedal: released	0%-5%
Coolant temperature	Vehicle READY 2 minutes later		-40-210°C
SSO enabled	Power down process: ON → OFF		Enable
	Other		Disable
S-mode switch	S-mode switch is unpressed		None
	S-mode switch is pressed		Yes
DCDC hardwired enabled	The key at "LOCK" or pull out; Power down process: ON → OFF		Disable
	Key is at ON		Enable
Handbrake signal	Handbrake released		Handbrake down
	Handbrake up		Handbrake up
Timing charge switch signal	Key is at ON	Timing charge switch: pressed	ON
		Timing charge switch: unpressed	OFF
VCU failure	VCU operation is normal		Normal
	VCU operation is abnormal		Failure
M/C relay enable	READY		Engaged
	Key is at ON		Engaged
	The key at "LOCK" or pull out;		Cut off
AC relay enable	READY		Engaged
	Key is at ON		Engaged
	The key at "LOCK" or pull out;		Cut off
High voltage anode relay enable	READY		Engaged
	Key is at ON		Engaged
	The key at "LOCK" or pull out;		Cut off
High voltage cathode relay enable	READY		Engaged
	Key is at ON		Engaged
	The key at "LOCK" or pull out;		Cut off
High voltage pre-charge relay enable	READY		Engaged
	Key is at ON		Engaged
	The key at "LOCK" or pull out;		Cut off
DC charger relay enabled	DC charging status		Engaged
	Other		Cut off
VCU mode	Remote query		STAND_BY_MODE
	Key is at ON		NORMAL_MODE
	Slow charging		AC_CHARGE_MODE
	DC charging		DC_CHARGE_MODE
VCU_Sub1_1	Key is at ON		STANDBY_MODE
	Key is at ON		POWERED_MODE
	The key at "LOCK" or pull out;		POWERDOWN_MODE
VCU_Sub2_1	Key is at ON		POWERUP_MODE
	READY		READY_MODE
	READY, and in the D gear or R gear		RUN_MODE
VCU_Sub1_2	Slow charging plug is plugged in		AC_CHARGE_POWERUP_MODE
	Slow charging plug is plugged in		AC_CHARGE_PROCESS_MODE
	Slow charging plug is unplugged		AC_CHARGE_POWERDOWN_MODE
VCU_Sub1_3	DC charging plug is plugged in		DC_CHARGE_POWERUP_MODE
	DC charging plug is plugged in		DC_CHARGE_PROCESS_MODE
	DC charging plug is unplugged		DC_CHARGE_POWERDOWN_MODE
VCU_Sub1_4	Remote query		REMOTE_INQUIRE_MODE
	Remote air conditioner control		REMOTE_AIR_CONTROL_MODE
	Remote charging control		REMOTE_CHARGE_MODE
	Remote operation end		REMOTE_POWERDOWN_MODE
SOC	Key is at ON		0-100%
	Charging status		0-100%
SOE	Key is at ON		0-100%
	Charging status		0-100%
SOH	Key is at ON		0-100%
	Charging status		0-100%
Remaining power of high-voltage battery	Based on Remaining energy of battery		0-100%
Reference residual mileage	Key is at ON		0～180km
AC ON remaining mileage	Air conditioning on		0～-150km
AC OFF remaining mileage	Air conditioning off		0～-150km
Remote wake-up command	Remote operation		Enable
	No remote operation		Disable
Remote charging request	No remote charging request		2
	Remote charging request		3
Remote air conditioner request	No remote air conditioner request		2
	Remote air conditioner request		3
12V battery charging command	Without vehicle stationary for 60 hours		1
	Vehicle stationary for 60 hours		2
Remote read vehicle status request	No remote read vehicle data request		2
	Remote read vehicle data request		3
Remote operation status	Remote operation		Remote operation process
	Remote operation complete		Remote operation end
Remote air conditioning status	Remote air conditioning is successful		Remote air conditioning on
	Remote air conditioning is completed		Remote air conditioning off
Status of remote charging plug	Charging plug is unplugged		The charger plug is not inserted
	DC charging plug is inserted		The charger plug is inserted but not charging
	DC charging plug is inserted		The charger plug is inserted and charging
Remote charging status	DC charging plug is plugged		Charging completed, plug unplugged
	DC charging plug is plugged		Charging process
	Charging plug is unplugged		Off
Remote air conditioning demand temperature	Remote air conditioning on		0-30°C
VCU power down command bit	Remote operation end		Power down command
	Other		Other
Motor target torque	READY		0-215Nm
Motor actual torque	READY		0-215Nm Based on the accelerator pedal opening
Motor actual speed	Speed is 0 km/h		0rpm
	Speed is 60km/h		3600rpm (around)
High voltage power state			No high voltage power on
			High voltage power on completed
Motor controller IGBT temperature	Key is at ON		-40-210℃
Motor controller temperature	Key is at ON		-40-210℃
Motor temperature	Key is at ON		-40-210℃
Motor torque limit	READY		0-100Nm
PCU IGBT command			Gate OFF
			Gate ON
IGBT state	Actual operating status of PCU IGBT		Gate OFF (refer to PCU IGBT command)
	Actual operating status of PCU IGBT		Gate ON (refer to PCU IGBT command)
TM motor current steering command	READY, and in the D gear		Forward
	READY, and in the R gear		Backward
Motor current steering	The drive wheel rotates forward		Forward
	The drive wheel rotates backward		Backward
TM motor bus voltage value	Key is at ON		0-1003.98V
Voltage of high-voltage battery	Key is at ON		276-377.2V
Current of high-voltage battery	READY Electrical load: no load		0-10A
Maximum single cell voltage	Key is at ON		0-5000mv
	Charging status		0-5000mv
Minimum single cell voltage	Key is at ON		0-5000mv
	Charging status		0-5000mv
Minimum single cell temperature	Key is at ON		-40-125°C
	Charging status		-40-125°C
Maximum single cell temperature	Key is at ON		-40-125°C
	Charging status		-40-125°C
Sensor temperature of high-voltage battery 1	Key is at ON		-40-125°C
Sensor temperature of high-voltage battery 2	Key is at ON		-40-125°C
Sensor temperature of high-voltage battery 3	Key is at ON		-40-125°C
Minimum temperature sensor number of power battery	Key is at ON		0-15
Maximum temperature sensor number of power battery	Key is at ON		0-15
Maximum single cell voltage cell number	Key is at ON		0-92
	Charging status		0-92
Minimum single cell voltage cell number	Key is at ON		0-92
	Charging status		0-92
Maximum battery cell internal resistance	Key is at ON		0-255mΩ
Battery pack internal resistance	Key is at ON		0-2550mΩ
Insulation resistance	Key is at ON		0~650MΩ
	Charging state		0~650MΩ
Battery thermal management operation mode	Charging status		Charging insulation
	Charging status		Charging cooling
	Charging status		Normal-temperature charge
	READY		Discharging cooling
	READY		Normal-temperature discharge
	Charging status		Charging preheat
	Charging status		Charging precooling
	Charging status		Charging terminal insulation
	Charging status		Charging terminal ambient temperature
Charging ampere-hour	Charging status		0-70Ah
Discharging ampere-hour	Key is at ON		0-70Ah
Release energy	Key is at ON		0-24kwh
Charged energy	Charging status		0-24kwh
LBC operation mode	Power on process: OFF → ON Charge power on process: OFF → ON		Initialization
	Key is at ON/ charge status		Operating
Battery evaporator solenoid valve command	According to the battery thermal management mode		OFF
	According to the battery thermal management mode		ON
Battery steam solenoid valve status	According to the battery thermal management mode		OFF
	According to the battery thermal management mode		ON
The remote crew cabin evaporator open command	No remote air conditioning refrigeration request		OFF
	Remote air conditioning refrigeration request		ON
Air conditioning crew cabin evaporator solenoid valve status	No remote air conditioning refrigeration command		OFF
	Remote air conditioning refrigeration command		ON
Condenser fan request	Air conditioning not on		OFF
	Air conditioning on		Low grade/ high grade
Blower operating status	MP5 air volume is not turned on		OFF
	MP5 air volume is turned on		ON
Battery evaporator temperature	Key is at ON		-40-125°C
	Charging status		-40-125°C
Battery PTC temperature	Key is at ON		-40-125°C
	Charging status		-40-125°C
Battery cooling temperature demand	Key is at ON		-40-125°C
No open the solenoid valve	Charging state, the battery cell voltage is low		OFF
	Other		ON
Battery fan ON command 1	According to the battery thermal management mode		ON
	According to the battery thermal management mode		OFF
Battery fan ON command 2	According to the battery thermal management mode		ON
	According to the battery thermal management mode		OFF
Battery fan flag	According to the battery fan on command		OFF
	According to the battery fan on command		Fan 1 on
	According to the battery fan on command		Fan 2 on
	According to the battery fan on command		Fan 1 and fan 2 on at the same time
Battery PTC open command	According to the battery thermal management mode		ON
	According to the battery thermal management mode		OFF
Battery PTC working status	According to the battery PTC open command		ON
	According to the battery PTC open command		OFF
Slow-charge wakeup signal	Slow charging plug is plugged in		Enable
	Slow charging plug is unplugged		Disable
Output current of slow-charging high-voltage end	Charge status of slow charging		0-10A
Current command of slow charging	Charge status of slow charging		0-10A
Output voltage value of slow-charging’s high-voltage end	Charge status of slow charging		276-377.2V
Maximum charging voltage of slow charging	Long-distance charging mode		Below 388V
	Normal charging mode		Below 384V
	Long-lifespan charging mode		Below 384V
	Low temperature charging mode		Below 384V
Remaining time of slow charging	Slow charging		0-1000 minutes
Stop-charging command of slow charging	Slow charging plug is unplugged		Stop charging
	Slow charging plug is plugged in		Charge allowable
DC charge wake-up signal	DC charging plug is plugged in		Enable
	DC charging plug is unplugged		Disable
Turn-on command of DC charging	DC charging plug is unplugged		Stop charging
	DC charging plug is plugged in		Charge allowable
Permission signal of DC charging	DC charging plug is unplugged		Stop charging
	DC charging plug is plugged in		Charge allowable
Current command of DC charging	DC charging status		0-35A
Maximum allowable charge voltage of DC charging	DC charging status		384V
Output voltage of DC charging’s high-voltage end	DC charging status		0-750V
Output current of DC charging’s high-voltage end	DC charging status		0-400A
Position of DC charging’s full status	DC charging is complete		Charge full
	DC charging status		Not charging full
Remaining time of completing DC charging	DC charging		0-1000 minutes
Working temperature of charger	Charging state		-40-210℃
Air conditioning limit power command (%)	Key is at ON		0-100%
Prohibit compressor start command	Power down process: ON → OFF		Not start
	Key is at ON		Start
	READY		Start
Environment temperature	Key is at ON		Displays based on the current ambient temperature
User demand temperature	Air conditioning on		16-32°C
Interior temperature	Key is at ON		-40-125°C
Compressor working status	Key is at ON		OFF
	READY	Air conditioning not on	OFF
		Air conditioning on	ON
Compressor speed	Key is at ON		0
	READY	Air conditioning not on	0
		Air conditioning on	0-4500
A/C system normal	Normal		No fault
	Fault		There is fault
Compressor motor missing phase	Normal		No fault
	Fault		There is fault
The air conditioning controller output overload	Normal		No fault
	Fault		There is fault
Air conditioning controller overheat	Normal		No fault
	Fault		There is fault
The air conditioning controller output short circuit	Normal		No fault
	Fault		There is fault
Air conditioning input DC undervoltage	Normal		No fault
	Fault		There is fault
Air conditioning input DC overvoltage	Normal		No fault
	Fault		There is fault
Rear defrost state	Rear defrost operation: operate		ON
	Rear defrost operation: no operate		OFF
PTC on status			Invalid
			PTC 1 grade is on
			PTC 2 grade is on
Whether ABS is working	Not using		Inactive
	Using		Active
Whether ABS is operating properly	Normal		ABS Normal
	Malfunction		ABS Failed
Whether EBD is operating properly	Normal		EBD Normal
	Malfunction		EBD Failed
Motor controller fault code	Key is at ON		0-255
Battery management system fault code	Key is at ON		0-255
	Charging		0-255
Fault code of vehicle controller	Key is at ON		0-255
	Charging		0-255
Charger fault code	Charging		0-255

VCU harness connector port layout

VCU port and reference value

Terminal number		Description		Condition	Measured value (approximate)
+	-	Signal name	Input/output	Condition	Measured value (approximate)
1	——	VCU grounding	——	——	——
8	GND	MC relay low side drive	Output	The key at "LOCK" or pull out;	12V battery voltage (13-14 V)
8	GND	MC relay low side drive	Output	Key is at ON gear.	0V (approximate)
9	——	VCU grounding	——	——	——
10	GND	Battery power supply	Input	Key is at ON gear.	12V battery voltage (13-14 V)
12	GND	Charging power check	Input	Vehicle is under slow-charging	PWM signal Amplitude: +12V, frequency: 1 KHz Duty cycle: 1% - 100%
13	GND	Charging connection status	Input	The vehicle is connected to the slow charging piles by means of a charging plug	1.953 – 2.096 V
				The vehicle is connected to the home power supply via a charging plug	2.928 – 3.072 V
				The vehicle is connected to the DC charging charging pile via a charging plug	2.425 – 2.575 V
14	GND	Gear voltage signal 1	Input	· Key is at ON gear · The shift lever hangs to the "D" gear	1.3 – 1.9 V
				· Key is at ON gear · The shift lever hangs to the "R" gear	2.9 – 3.4 V
				· Key is at ON gear · The shift lever hangs to the "N" gear	2.9 – 3.4 V
15	72	Accelerated pedal opening 2	Input	· Key is at ON gear · Accelerator pedal not pressed	0.375 V (approximate)
15	72	Accelerated pedal opening 2	Input	· Key is at ON gear · Accelerator pedal totally pressed	2.225 V (approximate)
17	75	Brake pedal opening 2	Input	· Key is at ON gear · Brake pedal not pressed	0.375 V (approximate)
17	75	Brake pedal opening 2	Input	· Key is at ON gear · Brake pedal totally pressed	1.92 V (approximate)
21	GND	Remote wake-up	Input	TBOX issues a remote wake-up request	12V battery voltage (13-14 V)
21	GND	Remote wake-up	Input	TBOX no issues a remote wake-up request	0 V
22	GND	Immediate charge cancellation request	Input	The immediate charge switch pressed	0 V
22	GND	Immediate charge cancellation request	Input	The immediate charge switch released	5.16 V (approximate)
23	GND	Brake light on	Input	· Key is at ON gear · Brake pedal not pressed by driver	0 V
23	GND	Brake light on	Input	· Key is at ON gear · Brake pedal pressed by driver	12V battery voltage (13-14 V)
24	GND	Slow charge wake-up signal	Input	The vehicle is connected to the slow charging piles or home power by means of a charging plug	12V battery voltage (13-14 V)
24	GND	Slow charge wake-up signal	Input	The vehicle is not connected to the slow charging piles or home power by means of a charging plug	0 V
27	GND	Reversing light relay drive	Output	· Key is at ON gear · The shift lever hangs to the "R" gear	0 V
27	GND	Reversing light relay drive	Output	· Key is at ON gear · The shift lever hangs to the "R" gear The shift lever hangs to the "R" gear	12V battery voltage (13-14 V)
29	GND	Battery power supply	Input	Key is at ON gear.	12V battery voltage (13-14 V)
33	GND	Gear voltage signal 2	Input	· Key is at ON gear · The shift lever hangs to the "D" gear	2.9 – 3.4 V
				· Key is at ON gear · The shift lever hangs to the "R" gear	2.9 – 3.4 V
				· Key is at ON gear · The shift lever hangs to the "N" gear	1.3 – 1.9 V
34	72	Accelerated pedal opening 1	Input	· Key is at ON gear · Accelerator pedal not pressed	0.75 V (approximate)
34	72	Accelerated pedal opening 1	Input	· Key is at ON gear · Accelerator pedal totally pressed	4.45 V (approximate)
36	75	Brake pedal opening 1	Input	· Key is at ON gear · Brake pedal not pressed	0.75 V (approximate)
36	75	Brake pedal opening 1	Input	· Key is at ON gear · Brake pedal totally pressed	3.84 V (approximate)
39	GND	High voltage interlock	Input	· Key is at ON gear · High voltage wire harness connection is normal	12V battery voltage (13-14 V)
39	GND	High voltage interlock	Input	· Key is at ON gear · High voltage wire harness connection is abnormal	0 V
40	GND	S-mode switch	Input	· Key is at ON gear S-mode switch is pressed	12V battery voltage (13-14 V)
40	GND	S-mode switch	Input	· Key is at ON gear · S-mode switch is released	0 V
41	GND	LBC failure	Input	· Key is at ON gear · failure exists in LBC	0 V
41	GND	LBC failure	Input	· Key is at ON gear · no failure exists in LBC	3.18 V (approximate)
43	GND	Key is at ON gear	Input	Key is at ON gear.	12V battery voltage (13-14 V)
47	——	VCU grounding	——	——	——
48	GND	Battery power supply	Input	Key is at ON gear.	12V battery voltage (13-14 V)
52	GND	Gear voltage signal 3	Input	· Key is at ON gear · The shift lever hangs to the "D" gear	1.3 – 1.9 V
				· Key is at ON gear · The shift lever hangs to the "R" gear	1.3 – 1.9 V
				· Key is at ON gear · The shift lever hangs to the "N" gear	1.3 – 1.9 V
53	——	Accelerated pedal opening 2 loop	——	——	——
54	73	Water temperature sensor	Input	Key is at ON gear.	0.455 – 5 V
62	GND	The key is rotated to "START"	Input	The key is rotated to "START"	12V battery voltage (13-14 V)
64	GND	Cooling fan control	Output	The vehicle is in running state	Duty cycle: 55% - 100%
64	GND	Cooling fan control	Output	· The vehicle is in charging state · Air conditioning on	Duty cycle: 65% - 100%
65	GND	Pedestrian warning	Input
66	——	VCU grounding	——	——	——
67	GND	Battery power supply	Input	Key is at ON gear.	12V battery voltage (13-14 V)
71	GND	Gear voltage signal 4	Input	· Key is at ON gear · The shift lever hangs to the "D" gear	2.9 – 3.4 V
				· Key is at ON gear · The shift lever hangs to the "R" gear	1.3 – 1.9 V
				· Key is at ON gear · The shift lever hangs to the "N" gear	2.9 – 3.4 V
72	——	Accelerated pedal opening 1 loop	——	——	——
73	——	Water temperature sensor signal loop	——	——	——
75	——	Brake pedal opening 1 loop	——	——	——
76	GND	Airbag	Input	· Key is at ON gear · The collision output signal is valid	0 V
76	GND	Airbag	Input	· Key is at ON gear · The collision output signal is invalid	6.8 (approximate)
77	GND	Brake switch	Input	· Key is at ON gear · Brake pedal not pressed by driver	12V battery voltage (13-14 V)
77	GND	Brake switch	Input	· Key is at ON gear · Brake pedal pressed by driver	0 V
79	GND	Handbrake	Input	· Key is at ON gear · Handbrake up	0 V
79	GND	Handbrake	Input	· Key is at ON gear · Handbrake not pull up	1.83 V (approximate)
81	GND	DC charge wake-up	Input	The vehicle is connected to the DC charging pile via a charging plug	12V battery voltage (13-14 V)
81	GND	DC charge wake-up	Input	The vehicle is not connected to the DC charging pile	0 V
83	GND	Self-holding SSO control signal	Output	Key is at ON gear.	0 V
83	GND	Self-holding SSO control signal	Output	The key is placed in the "LOCK" block or 1 second (approximate) after pull out	12V battery voltage (13-14 V)
85	——	Brake pedal opening 2 loop	——	——	——
86	GND	Charge indicator 1 (yellow)	Output	The vehicle is connected to the fast / slow charging piles or household power supply via a charging plug	4.8 V (approximate, continuous)
				The immediate charge off switch pressed	4.8V (approximate, jump)
				Other conditions	0 V
91	GND	DC charging relay control	Output	· The key at "LOCK" or pull out The vehicle is connected to the DC charging pile via a charging plug, with card to confirm the vehicle into the DC charging process\	12V battery voltage (13-14 V)
91	GND	DC charging relay control	Output	Other conditions	0 V
92	GND	DCDC enable	Output	Key is at ON gear.	12V battery voltage (13-14 V)
96	1	Brake pedal sensor 1 powered	Output	Key is at ON gear.	5 V ± 0.1 V
98	1	Brake pedal sensor 2 powered	Output	Key is at ON gear.	5 V ± 0.1 V
99	GND	Total negative relay control (12V)	Output	Key is at ON gear.	12V battery voltage (13-14 V)
100	GND	Precharge relay control (12V)	Output	Key is at ON gear.	12V battery voltage (13-14 V)
101	GND	AC relay control	Output	· Air conditioning on request is valid	0 V
101	GND	AC relay control	Output	· Air conditioning on request is invalid	12V battery voltage (13-14 V)
104	1	Accelerator pedal sensor 2 powered	Output	Key is at ON gear.	5 V ± 0.1 V
106	GND	Charge indicator 2 (green)	Output	DC charging or slow charging process	4.8 V (approximate, continuous)
				DC charging or slow charging process completed	4.8V (approximate, jump)
				Other conditions	0 V
107	GND	Total positive relay control (12V)	Output	Key is at ON gear.	12V battery voltage (13-14 V)
109	GND	Cooling water pump control signal	Output	The vehicle is in running state	Duty cycle: 30% - 98%
				The vehicle is in AC charging state	Duty cycle: 20% - 98%
				The vehicle is in DC charging state	Duty cycle: 10% - 98%
112	1	Accelerator pedal sensor 1 powered	Output	Key is at ON gear.	5 V ± 0.1 V
115	1	DC Charging CAN-2H	Input/output	VCU power on	Check for CAN messages
116	1	DC Charging CAN-2L
120	1	Vehicle CAN-1H
121	1	Vehicle CAN-1H

Safety-failure mode

Safety-failure mode type

Type A:DC charging is prohibited

Type A: AC charging is prohibited

Type C: prohibit driving

Type D: cut off the high voltage

Safety-failure mode list

DTC		Processing type				Other processing methods
DTC		A	B	C	D	Other processing methods
P0642				×
P0643				×
P0A02
P0A03
P0A8D		×	×	×	×
P0A8E		×	×	×	×
P0A94	Case 1	×	×	×	×
P0A94	Case 2					Limp mode
P0AA1
P0AA4		×	×	×	×
P0AA0						Limp mode
P2122						Respond to another way
P2123						Respond to another way
P2127						Respond to another way
P2128						Respond to another way
P2138	Case 1			×
P2138	Case 2					Limp mode
P3012		×	×	×	×
P3013		×	×	×	×
P3015		×	×	×	×
P3016		×	×	×	×
P3017		×	×	×	×
P3010					×
P3006				×
P3007				×
P3008				×
P3009				×
P300C	Case 1	×	×	×	×
P300C	Case 2					Limp mode
P300D	Case 1	×	×	×	×
P300D	Case 2					Limp mode
P300E	Case 1	×	×	×	×
P300E	Case 2					Limp mode
P300F	Case 1	×	×	×	×
	Case 2					Limp mode
	Case 3
P301F		×
P3020			×
P3014		×	×	×	×
P3011		×	×	×	×
P301A		×	×	×	×
P301B		×	×	×	×

DTC detection priority table

If some DTC are displayed at the same time, check them in the order in the following list of priorities.

Priority	DTC	Failure Name
1	P0642, P0643	VCU chip power supply failure
	P0A8D，P0A8E	VCU power supply failure
	P3010	Vehicle collision failure
	P0A94	DC/DC failure
	P3015, P3016, P3017	High voltage loop failure
	P3014	M/C relay failure
2	P2122	Accelerator pedal first sensor failure
	P2123	Accelerator pedal first sensor failure
	P2127	Accelerator pedal second sensor failure
	P2128	Accelerator pedal second sensor failure
	P3012	Motor controller failure
	P3013	Battery controller failure
	P0AA1	High voltage positive relay failure
	P0AA4	High voltage negative relay failure
	P0AA0	High voltage pre-charge relay failure
	P3006, P3007, P3008, P3009	Shift control mechanism failure
	P3011	The high voltage interlock failure
3	P2138	Accelerator pedal ratio failure
	P300C, P300D, P300E	Battery controller message missing fault
	P300F	Motor controller message-missing fault
	P301F	Charger controller message-missing fault
	P3020	Charger pile message-missing fault
	P0A02，P0A03	Coolant temperature sensor fault
	P301A	High voltage loop failure
	P301B	Air conditioning compressor high voltage circuit failure

DTC index

DTC	Failure Name	Failure Light
P0642	VCU chip power supply failure	The system fault light
P0643	VCU chip power supply failure	The system fault light
P0A02	Coolant temperature sensor fault	—
P0A03	Coolant temperature sensor fault	—
P0A8D	VCU power supply failure	Battery fault indicator light
P0A8E	VCU power supply failure	Battery fault indicator light
P0A94	DC/DC failure	Battery fault indicator light
P0AA1	High voltage positive relay failure	—
P0AA4	High voltage negative relay failure	The system fault light
P0AA0	High voltage pre-charge relay failure	The system fault light
P2122	Accelerator pedal first sensor failure	The system fault light
P2123	Accelerator pedal first sensor failure	The system fault light
P2127	Accelerator pedal second sensor failure	The system fault light
P2128	Accelerator pedal second sensor failure	The system fault light
P2138	Accelerator pedal ratio failure	The system fault light
P3012	Motor controller failure	The motor fault light
P3013	Motor controller failure	Battery fault indicator light
P3015	High voltage loop failure	The system fault light
P3016	High voltage loop failure	The system fault light
P3017	High voltage loop failure	The system fault light
P3010	Vehicle collision failure	The system fault light
P3006	Shift control mechanism failure	Shift fault light
P3007	Shift control mechanism failure	Shift fault light
P3008	Shift control mechanism failure	Shift fault light
P3009	Shift control mechanism failure	Shift fault light
P300C	Battery controller message-missing fault	Battery fault indicator light
P300D	Battery controller message missing fault	Battery fault indicator light
P300E	Battery controller message-missing fault	Battery fault indicator light
P300F	Motor controller message missing fault	The motor fault indicator
P301F	Charger controller message-missing fault	—
P3020	Charger pile message-missing fault	—
P3014	M/C relay failure	The system fault light
P3011	The high voltage interlock failure	The system fault light
P301A	High voltage loop failure	The system fault light
P301B	Air conditioning compressor high voltage circuit failure	The system fault light

Electrical principle of control system

Control system principle diagram

Partsconnector

VCU connector 1

Connector number	F21
Connector name	VCU plug-in 1
Connector type	1473244-1

Terminal number	Line color	Signal name
1	B	VC01 Power supply ground
8	B	VC08 M/C relay control
9	B	VC09 Power supply ground
10	R	VC10 Power supply positive
12	W	CP01 Charging power check
13	W	FT04 Charging connection status signal
14	WO	VC14 Electronic shift switch signal 1
15	W	VC15 signal output 2
17	G	VC17 Brake signal output 2
21	R	CZ14a Remote wake-up signal
22	YR	VC22 request signal of canceling instant charging
23	G	VC23 Brake light turn-on signal
24	W	CH03 Slow charging wake up signal
27	BrW	VC27 Reversing lamp relay control signal
29	R	VC29 Power supply positive
33	BW	VC33 Electronic shift switch signal 2
34	GW	VC34 signal output 1
36	W	VC36 Brake signal output 1
39	WB	VC39 High voltage interlock signal 2
40	W	VC40 S-mode switch signal
41	WY	HFT01 LBC fault signal
43	L	ZB03d IG1
47	B	VC47 Power supply ground
48	R	VC48 Power supply positive
52	GY	VC52 Electronic shift switch signal 3
53	B	VC53 accelerator pedal power supply negative
54	PB	VC54 water temperature sensor
62	WO	ST02 KEY START signal
64	LR	VC64 control signal of cooling fan
65	Y	VC65 VCU hardline data input
66	B	VC66 Power supply ground
67	R	VC67 Power supply positive
71	Y	VC71 Electronic shift switch signal 4
72	B	VC72 accelerator pedal power supply negative
73	LY	VC73 water temperature sensor signal
75	B	VC75 brake pedal power supply negative
76	YL	AI05 Airbag release signal (0V)
77	L	VC77 Brake switch status signal
79	BW	BR05g handbrake signal
81	R	FT06 fast-charging wake up signal

VCU connector 2

Connector number	F22
Connector name	VCU Connector 2
Connector type	1473252-1

Terminal number	Line color	Signal name
83	P	VC83 Self-holding SSO control signal
85	L	VC85 brake pedal sensor 2 ground
86	Y	VC86 Charge indicator 1 (yellow)
91	R	VC91 Fast charge relay control signal
92	GrO	VC92 DCDC enable
96	R	VC96 Brake pedal sensor 1 power-supply
98	Y	VC98 Brake pedal sensor 2 power-supply
99	W	VC99 Total Negative Relay Control (12V)
100	R	VC100 Precharge relay control (12V)
101	LR	VC101 AC relay control (0V)
104	R	VC104 Accelerator pedal sensor 2 power-supply
106	G	VC106 Charge indicator 2 (green)
107	R	VC107 Main positive Relay Control (12V)
109	B	VC109 Cooling water pump control signal
112	RY	VC112 Accelerator pedal sensor 1 power-supply
115	RW	CANH-2
116	RY	CANL-2
120	RW	CAMHj
121	RY	CAMLj

VSP controller

Connector number	F19
Connector name	VSP controller
Connector type	34729-0080

Terminal number	Line color	Signal name
1	R	ZB10c VSP controller power-supply positive
3	RW	VSP03 VSP honk power-supply positive
4	BL	VSP04 VSP honk power-supply negative
5	B	VSP05 VSP power-supply negative
6	Y	VC65 VCU hardline data input
7	BW	VSP07 VSP work signal feedback

Connector of cooling fan

Connector number	F09
Connector name	Cooling fan
Connector type	MG642925-5

Terminal No.	Wire color	Signal name
1	RB	FA02 Fan power-supply is positive
2	LR	VC64 Fan control signal
3	B	FA1G Fan power-supply is negative

Connector of the electronic coolant pump.

Connector number	FC06
Connector name	Electronic coolant pump
Connector type	282087-1

Terminal number	Line color	Signal name
1	B	PC03 coolant pump power-supply negative
2	W	VC109 PWM control signal
3	RW	PC02 coolant pump power-supply positive

Connector of remote intelligent terminal

Connector number	F20
Connector name	Remote intelligent terminal
Connector type	776273-1

Terminal number	Line color	Signal name
1	R	SR01 Remote Power supply positive
2	RW	CANHs vehicle CAN high
3	RY	CANLs vehicle CAN low
4	RW	CANHax battery internal CAN high
5	RY	CANLax Battery internal CAN low
10	B	CZ10 Remote Power supply negative
12	L	ZB03 IG2
14	R	CZ14 Remote wake-up signal

Connector of short-circuiter

Connector number
Connector name	Connector of short-circuiter
Connector type	MG610754

Terminal No.	Wire color	Signal name
1	R	VC10 VCU power-supply positive
2	R	VC29 VCU power-supply positive
3	R	VC48 VCU power-supply positive
4	R	VC67 VCU power-supply positive
5	R	ZB10 Power-supply positive
9	B	ZB02 power-supply negative
10	B	GND1
11	B	VC66 VCU power ground
12	B	VC47 VCU power ground
13	B	VC09 VCU power ground
14	B	VC01 VCU power ground

Low-voltage distributioncontroller connector

Connector number	F17
Connector name	Low voltage distribution controller
Connector type	MG610360

Terminal No.	Wire color	Signal name
1	W	CH03a Slow-charging wake up signal
2	B	ZB02 power-supply negative
3	L	ZB03b IG1
4	PW	VC83 SSO signal
5	R	FT06a DC charging wake-up signal
6	R	CZ14 Remote wake-up signal
8	VR	ZB08 Power supply positive
10	R	ZB10 Self-holding power supply

A/C relay

M/C relay

Connector of timing charge switch

Connector number	M05
Connector name	Canceling switch of instant charging
Connector type	MG651044 (white)

Terminal No.	Wire color	Signal name
2	PB	TI01d Backlight power supply
3	YR	AC20a VCU input
4	B	FC03 ground
5	L	TI03v Back light ground

LBC connector

Connector number	F17
Connector name	LBC
Connector type	RT061619PNHEC03

Terminal No.	Wire color	Signal name
A	RW	CANHk CAN_H signal interaction
B	RY	CANLk CAN_L signal interaction
C	B	CANGED CAN shielded ground
D	R	BM04 High level effective
E	R	VC107 B+ relay control
F	W	VC99 B+ relay control
G	R	VC100 Precharge relay control
H	B	BM17 Fan power ground
J	B	BM09 LBC power ground
K	WY	HFT01 hardline failure feedback
M	RW	CANHa Inner CAN high
N	RY	CANLa Inner CAN low
R	G	BX08 High voltage interlock signal 1
S	WB	VC39 High voltage interlock signal 2
U	R	BM11 LBC fan power supply
V	R	BM04a LBC power

Connector of airbag module

Connector number	B08
Connector name	Airbag module
Connector type	3-1393448-0（AMP) yellow

Terminal No.	Wire color	Signal name
1	GW	AI10 driver seat belt tension positive
2	YW	AI11 driver seat belt tension negative
3	YV	AI12 driver seat belt pre-tightening positive
4	YR	AI13 driver seat belt pre-tightening negative
5	Y	AI01x power supply
6	B	AI1G ground
7	YG	AI03x fault indicator
9	YB	AI02 K line
10	LR	AI06 driver-seat front airbag positive
11	LGr	AI07 driver-seat front airbag negative
12	YL	AI05 collision output 2
13	Lg	AI08 Copilot-seat front airbag positive
14	LB	AI09 Copilot-seat front airbag negative
37	YGr	AI04x collision output 1

Connector of brake lamp switch

Connector number	F16
Connector name	Brake light switch
Connector type	MG610267

Terminal No.	Wire color	Signal name
1	GrL	BR01 (high) brake light power supply positive
2	BrL	BR03 (high) brake light power supply positive
3	R	BR01a Brake light status signal (12V active, indicating brake light and brake pedal depression)
4	L	VC77 Brake switch status signal (0V active, indicating brake pedal depression)

Connector of S-mode switch

Connector number	B24
Connector name	S-mode switch
Connector type	MG653251-41（light-gray）

Terminal No.	Wire color	Signal name
2	W	VC40 control circuit
3	R	EC01 control circuit
5	L	TI03e back light -
6	G	TI01e back light +

Connector of gearshift control mechanism

Connector number	F19
Connector name	Shift control mechanism
Connector type	174045-2

Terminal number	Line color	Signal name
1	L	ZB03a IG1
2	WO	VC14 Switch signal 1
3	B	HD03 Electronic shift power supply negative
4	BW	VC33 Switch signal 2
6	GY	VC52 Switch signal 3
8	Y	VC71 Switch signal 4
11	B	HD03a Electronic shift power-supply negative

DC/DC connector

Connector number	FC01
Connector name	Motor controller
Connector type	770680-1

Terminal number	Line color	Signal name
1	R	PU01 motor controller 12V power supply positive
2	R	PU01a motor controller 12V power supply positive
10	PW	VC92 DCDC enable
11	GY	PU11 DCDC failure feedback
16	B	PU16 motor controller 12V power supply negative
21	G	CANL CAN_L signal interaction
22	Y	CANH CAN_H signal interaction
23	B	CANGED CAN shielded ground

Connector of high-voltage junction box

Connector number	FC03
Connector name	High voltage junction box
Connector type	33472-1201

Terminal number	Line color	Signal name
1	BY	PT01 PTC relay 12V power-supply positive
2	RB	ACB03 PTC relay 1 control
3	RW	ACB04 PTC relay 2 control
4	B	BX04 DC charging relay ground connection
5	RW	VC91 DC charging relay control
7	R	PU01b 12V power positive input
8	G	BX08 junction box high-voltage interlock 12V output

Connector of DC charging port

Connector number	F06
Connector name	DC Charging interface
Connector type	174264-2

Terminal number	Line color	Signal name
1	Y	CANH-2 CAN communication is high
2	G	CANL-2 CAN communication is low
3	B	CAN-GND CAN communication’s ground potential
4	R	FT06 Fast charge wake up signal (12V positive)
5	B	FT05 DC charging power-supply negative
6	W	FT04 Charging connection status signal

Connector of on-board charger

Connector number	FC05
Connector name	Car Charger
Connector type	PB625-08027

Terminal No.	Wire color	Signal name
1	L	CC01 Charging connection status confirmed
2	W	CP01 Charging power confirmed
3	R	KL30 charger power-supply
4	L	FT04a Charging status output
5	RW	CANHg CAN_H signal interaction
6	RY	CANLg CAN_L signal interaction
7	W	CH03 output 12V wake up signal
8	B	CS08 12V power-supply negative

Connector of AC charging port

Connector number	FC04
Connector name	AC charging interface
Connector type	174264-2 (black)

Terminal No.	Wire color	Signal name
3	R	SR01a 12V input signal(activate charger)
2	BW	SC01 12V output signal(activate charger)
1	L	CC01 Charging connection status confirm
6	LO	LK03xb charging lock signal 2 (interlock power negative)
5	LW	LK02xb charging lock signal 1 (interlock power negative)
4	W	CP01 Charging power confirmed

Basic check

Diagnostic and maintenance workflow

Work process

flow chart

Detailed flow

1.Obtain symptom information

Use the Diagnostic Worksheet to ask the customer for details about the symptoms (status and environment at the time of the accident / failure). (Refer to the below. "Diagnostic working list")

Yes >> Go to step 2

2.Detect DTC

1.检查DTC.

2. If DTC is displayed, perform the following steps.

- Record DTC.

- Study the relationship between the cause of the fault detected by the DTC and the symptoms described by the customer. (Symptom table is useful. Please refer to "Symptom comparison table")

3. Review the relevant maintenance records for more information.

Has the customer already described the symptoms and have already detected the DTC?

Fault described and DTC has been displayed. Yes >> Go to step 3

Describes the symptoms, does not show DTC. >> Go to step 4

No description or DTC displayed. >> Go to step 5

3.Confirm symptoms

Try to diagnose the symptoms described by the customer.

Also check the normal operation and the relevant symptoms on "safety - failure" mode list. Refer to “Safety-failure” mode list

The "Diagnostic Worksheet" is helpful in verifying the failure.

The relationship between symptoms and the state at which symptoms are detected is verified.

Yes >> Go to step 5

4.Confirm symptoms

Try to diagnose the symptoms described by the customer.

Also check the normal operation and the relevant symptoms on "safety - failure" mode list. Refer to “Safety-failure” mode list

The "Diagnostic Worksheet" is helpful in verifying the failure.

The relationship between symptoms and the state at which symptoms are detected is verified.

Yes >> Go to step 6

5.Execute the DTC confirmation step

Execute "DTC confirmation procedure" for the displayed DTC, and then confirm that the DTC is detected again.

If two or more DTC are detected, refer to the TBD page "DTC Check Priority Table" and then determine the order of the troubleshooting.

Whether DTC is detected ?

Yes >> Go to step 7

No >> Follow the "Overview - Fault Simulation Test" to check.

6.Check the system failure through the symptom table

According to the "symptom table", the fault diagnosis system is diagnosed based on the symptoms confirmed in step 4, and the method of the fault diagnosis is determined based on the possible causes and symptoms.

Is there symptomatic description?

Yes >> Go to step 7

No >> Use the diagnostic service tool to monitor the input of the relevant sensor or check the voltage of the associated VCU pin. Please refer to the above. “Reference value”

7.Check the defective parts by means of the diagnostic procedure

Check the defective parts by means of the diagnostic procedure

Is there a faulty part?

Yes >> Go to step 8

No >> Use the diagnostic service tool to monitor the input of the relevant sensor or check the voltage of the associated VCU pin. Please refer to the above. “Safety-failure mode”

8.repair or replace faulty parts

1.repair or replace faulty parts.

2. After completing the repair and replacement work, reconnect the parts or connectors that were disconnected during the troubleshooting process.

3.检查DTC. If there is a DTC display, clear it.

Yes >> Go to step 9

9.Final check

When the DTC is detected in step 2, perform the "DTC confirmation step" or "Full function check" again, and then confirm that the fault has been properly repaired. If the symptoms are described by the customer, refer to the symptoms identified in step 3 and step 4 to confirm that the symptoms described by the user are not detected.

Normal or abnormal ?

Abnormal (DTC detected) >> Go to 7

Abnormal (still have symptoms) >> turn to 4

normal >> Before removing the vehicle to the user, be sure to clear the DTC.

Diagnostic working list

Instruction

It may lead to a lot of EV control system failures of the driving situation. A thorough understanding of these situations can make troubleshooting easier and more accurate.

Often, each customer tends to have different feelings about the same problem. Therefore, it is important to fully understand the customer's description of the symptoms or circumstances.

In order to be able to effectively troubleshoot, it is best to use a diagnostic work order similar to the next page.

Diagnostic working list

Diagnostic working list
Customer Name	License plate number	Registration date
Customer Name	Vehicle model
Acceptance date	VIN could be obtained from the ECU.	Mileage	Kilo meter (km)

problem	group	Feedback
Condition of vehicle failure	R / Q / N / O	¨ Driving （R） ¨ DC charging（Q）¨ AC charging（N） ¨ Other (O)
Symptom	R	¨“READY” lamp indicator off¨Bad Driving¨Jitter¨Unable to travel¨Excessive noise¨Insufficient braking force¨Powerless acceleration¨High energy-consumption¨Switch failure¨Warning light on¨Mode cannot be cut off¨Other （）
		Detailed symptom
		Instrument indication information
		Power consumption	Km / kW
		Power battery remaining power
	Q,N	¨ Can not charge¨Charge interrupted ¨Slow charging¨ Fixed-time charging unavailable¨ Remote charging unavailable ¨ Can not be charged immediately ¨Other （）
		Detailed syndrome
		DC charging pile display information (if any)
	O	¨A/C unavailable¨Poor A/C performance¨Battery capacity loss¨Other （）
		Detailed syndrome
The road condition / state when the fault occurred	R/O	¨ Ordinary road ¨ highway ¨ mountain road ¨ bumpy road ¨ flat road ¨ uphill ¨ downhill ¨ steering ¨Other （）
	Q/N/O	¨ Charging initial ¨charging process ¨charging finished¨ after setting charging time (not charging yet) ¨ Fixed-time charging process ¨ remote charging process¨ Other （）
Driving conditions	R	¨When the system is on¨When the "READY" lamp indicator on (when the vehicle is in parking)¨When the vehicle is running¨When the vehicle is accelerating ¨Vehicle running in constant speed¨When the vehicle is taxing¨When the vehicle is braking¨Just before the vehicle is stopped¨Just after the vehicle is stopped ¨The key is placed in the "LOCK" or pulled out¨When AC is on¨When mode change¨Other （）
		Vehicle speed	Km
		The acceleration pedal position
DC charging pile	Q	DC charging pile	¨In line with the national standard DC charging pile¨Not in line with the national standard DC charging pile
		Position
		DC charging pile set
		Other
Household power outlet	N	¨In line with the national standard socket¨Not in line with the national standard socket
		Position
		Voltage	V
		Fuse current	A
		Other information
Remaining battery power	Q/N/O	¨ With remaining power¨ Without remaining power （）
Gears / operations	R	¨D¨R¨N¨S¨operating method （ → ）
environmental condition	R / Q / N / O	Weather
		Temperature	℃
Occurrence frequency		¨ Always ¨ Once ¨ Sometimes （happened for times） ¨ Other （）
Fault recovery condition		¨After the key is in the "OFF" or pulled out¨Replace the 12V battery or harness¨Gear shift¨During the driving ¨ READY ¨ Other （）
【Memorandum】

Replace VCU parameter read and write operations

Description

When replacing VCU, you must follow the procedure below.

Work process:

Depending on whether the contents of the VCU are saved or written, the operations performed are different. Please follow the procedure below

1.Save VCU data

1. The key at "LOCK" or pull out; wait at least 45s.

2 Turn the key to “ON”.

3． Open the JAC diagnostic tool, write down the relevant VCU data.

Note:

VCU stored vehicle VIN code, SOC, SOE, SOH and long-distance charging data recorded.

>>Turn to step 2.

2.Remove VCU

1. The key at "LOCK" or pull out; wait at least 45s.

2 Remove VCU Please refer to “Disassembly and installation” section

>>Turn to step 3.

3.Write VCU data

1. Write the recorded data in the appropriate position of the diagnostic tool and write it into.

>>Turn to step 4.

4.Check DTC

1. The key at "LOCK" or pull out; wait at least 20s.

2 Turn the key to “ON”.

3.check DTC If there is a DTC display, clear it.

>> finish

Replace the power battery parameters read and write operations

Description

When the power battery is replaced, power battery capacity and other information must be reset. When the power battery pack is replaced, the power battery capacity and other data stored in the VCUare different with the actual power battery status. In this case, the VCU will be based onthe wrong data to calculate the relevant parameters of the power battery. It is necessary to clear the data of the original power battery and store the new power battery data (SOC, SOE, SOH and long-term charge times) in the VCU.

Note：

If the power battery pack is not replaced, it is forbidden to clear or change the battery-related data (SOC, SOE, SOH, and long-term charge) stored in the VCU.

Vehicle VIN read and write operations

Description：

Use the new energy vehicle-specific diagnostic tool to read the vehicle VIN code or write the VIN code of the vehicle to the VCU when the VCU is replaced.

Note：

After the replacement of the VCU, the VIN code must be written.

Work process:

1.Check

Check the VIN code of the vehicle and record it

Go to step 2

2.Execute VIN code to write

1.Turn the key to ON （No READY）

2. Connect the diagnostic tool interface to the vehicle diagnostics interface to confirm that the device is connected.

3. Write the vehicle VIN code according to the diagnostic tool tip.

>> finish

Vehicle faults diagnosis

VCU power supply and ground circuit

VCU

1.Check the fuse

Check if the following fuses are blown.

Power supply	Fuse number
12V battery	Self-holding insurance (outdoor fuse box)
“ON” signal	IG 1 fuse (outdoor fuse box)

Check if the fuses are blown.

Normal >>Change the fuse.

No >> Go to step 2

2.Detect VCU ground circuit

1. Turn the key to "LOCK" or pull out;

2. Disconnect VCU connector.

3. Detect the continuity of the VCU connector and the vehicle body.

Multimeter positive lead		Multimeter negative lead	Connectivity
DC/DC
Connector	Terminal number
C17	1	Vehicle body ground	Conduction
	9
	47
	66

Check if the result is normal.

Yes >> Go to step 3

No >> Repair or replace the fault part.

3.Detect VCU power supply

Detect the voltage difference between the VCU connector and the vehicle body.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
VCU
Connector	Terminal number
C17	10	Vehicle body ground	Should be the same as the 12V battery voltage
	29
	48
	67

Check if the result is normal.

Yes >> Go to step 5

No >> Go to step 4

4.Detect VCU power supply circuit

1. Detect the continuity of the VCU connector and the low-voltage distribution controller connector.

Multimeter positive lead		Multimeter negative lead		Connectivity
VCU		Low voltage distribution controller
Connector	Terminal number	Connector	Terminal number
C17	10	C14	10	Conduction
	29
	48
	67

2. Also check whether the connector is short circuit to ground.

Check if the result is normal.

Yes >> Check the battery voltage

No >> Repair or replace the fault part.

5.Check the power supply of the key signal

1.Turn the key to ON.

2.Detect the voltage difference between the VCU connector and the vehicle body ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
VCU
Connector	Terminal number
C17	43	Vehicle body ground	11-14 V

Check if the result is normal.

Yes >> checking is finished.

No >> Go to step 6.

6. Check the power supply of the key signal

1. Turn the key to "LOCK" or pull out;

2. Detect the continuity of the VCU connector and the fuse.

Multimeter positive lead		Multimeter negative lead	Connectivity
VCU
Connector	Terminal number
C17	43	IG 1 fuse (outdoor fuse box)	Conduction

3. Also check whether the connector is short circuit to ground.

Check if the result is normal.

Yes >> Check the battery power supply circuit.

No >> Repair or replace the fault part.

P0642, P0643 VCU chip power supply failure

DTC logic

DTC diagnostic logic

DTC number	Failure Name	DTC diagnostic conditions	The possible causes for failure
P0642	VCU chip power supply failure	The VCU diagnosed that the chip supply voltage was lower than 4.6V.	VCU hardware
P0643	VCU chip power supply failure	The VCU diagnoses that the chip supply voltage is higher than 5.6V.	VCU hardware

DTC diagnostic procedures

1.Perform DTC confirmation procedure

1.Turn the key to ON.

2. Check the diagnostic results.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Check finished.

Diagnostic steps

1.Detect the accelerator pedal first sensor supply voltage

1. Turn the key to "LOCK" or pull out;

2. Disconnect the accelerator pedal connector;

3.Turn the key to ON.

4. Measure the voltage between the accelerator pedal supply the first sensor and the ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Accelerator pedal first sensor
Connector	Terminal number
F15	2	Ground	5V

Check if the result is normal.

Yes >> Go to step 4

No >> Go to step 2

2.Detect VCU power supply and ground

Perform VCU power supply and ground detection. Refer to "Electric vehicle control system - VCU power supply and grounding circuit".

Check if the result is normal.

Yes >> Go to step 3

No >> Repair or replace the fault

3.Check whether the component harness supplied by the VCU is short circuit

1. Turn the key to "LOCK" or pull out;

2. Disconnect VCU connector ；

3.Turn the key to ON.

4. Detect the voltage between the accelerator pedal sensor, the brake pedal sensor, the water temperature sensor, the CC signal and ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Accelerator pedal first sensor
Connector	Terminal number
F15	2	Ground	0V

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Accelerator pedal second sensor
Connector	Terminal number
F15	1	Ground	0V

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Brake pedal first sensor
Connector	Terminal number
F14	C	Ground	0V

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Brake pedal first sensor
Connector	Terminal number
F14	D	Ground	0V

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Water temperature sensor
Connector	Terminal number
F08	2	Ground	0V

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
CC signal
Connector	Terminal number
F21	13	Ground	0V

Check if the result is normal.

Yes >> Check if the sensor is short circuit to ground

No >> Repair or replace the fault part

4.Detect intermittent faults

Detect intermittent faults

Check if the result is normal.

No >> Refer to "Overview - Fault simulation test".

No >> Repair or replace the fault part

P0A02，P0A03 coolant temperature sensorfault

DTC Logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P0A02

Coolant temperature sensor fault

VCU detects that voltage of coolant temperature sensor is less than 0.1V for 2.5 seconds.

Wire harness or connector.

Coolant temperature sensor

P0A03

VCU detects that voltage of coolant temperature sensor exceeds 4.9V for 2.5 seconds.

DTC diagnostic procedures

1.Perform DTC confirmation procedure

1.Turn the key to ON.

2. Check the diagnostic results.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Check finished.

Diagnostic steps

1. Check power-supply voltage of coolant temperature sensor

1. Turn the key to "LOCK" or pull out;

2. Disconnect coolant temperature sensor connector;

3.Turn the key to ON.

4. Detect the voltage between the sensor's power-supply end and vehicle body’s ground end.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Coolant temperature sensor
Connector	Terminal number
F08	2	Vehicle body ground	5V

Check if the result is normal.

Yes >> Go to step 2

No >> Go to step 4

2. Check ground connection of coolant temperature sensor

Check the voltage between the sensor and vehicle body’s ground end.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Coolant temperature sensor
Connector	Terminal number
F08	1	Vehicle body ground	0V

Check if the result is normal.

Yes >> Go to step 3

No >> Repair or replace the fault

3. Check the resistance value of coolant temperature sensor

Check the resistance value of coolant temperature sensor

Multimeter positive lead		Multimeter negative lead		Resistance value (approximate)
Coolant temperature sensor		Coolant temperature sensor
Connector	Terminal number	Connector	Terminal number
F08	2	F08	1	20kΩ

Is test results normal?

Yes >> Go to step 3

No >> Go to step 6

4.Detect VCU output of 5V power-supply

1. Turn the key to "LOCK" or pull out;

2. Disconnect VCU connector ；

3.Turn the key to ON.

4. Check the voltage between the sensor's power-supply end and vehicle body’s ground end.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
VCU provides power to coolant temperature sensor
Connector	Terminal number
F21	54	Vehicle body ground	5V

Check if the result is normal.

Yes >> Go to step 5

No >> Repair or replace the fault

5.Detect VCU power supply and ground

Perform VCU power supply and ground detection. Yes >> Refer to "Diagnostic Procedure" below.

Is test results normal?

Yes >> Replace VCU

No >> Repair or replace the VCU power-supply harness.

6.Detect intermittent faults

Detect intermittent faults

Check if the result is normal.

No >> Refer to "Overview - Fault simulation test".

No >> Repair or replace the fault part

P0A8D, P0A8E VCU power supply failure

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P0A8D

VCU power supply failure

VCU detects its power supply less than 10V for more than 10 seconds.

Wire harness or connector.

DC/DC

P0A8E

VCU detects that its power supply is higher than 16V for more than 25.5 seconds.

DTC diagnostic procedures

1.Perform DTC confirmation procedure

1.Turn the key to ON.

2. Check the diagnostic results.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Check finished.

Diagnostic steps

1.Detects DC / DC output voltage

1.Turn the key to ON.

2. Detect the voltage between the DC / DC output and ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
DC/DC
Connector	Terminal number
-	-	Ground	13V

Check if the result is normal.

Yes >> Go to step 2

No >> Go to step 4

2.Detects the output voltage of the low voltage distribution controller

1. Turn the key to "LOCK" or pull out;

2. Disconnect the connector between low-voltage distribution controller and VCU;

3.Turn the key to ON.

4. Detect the voltage between the low-voltage distribution controller connector and ground;

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Low voltage distribution controller
Connector	Terminal number
F17	10	Ground	13V

Check if the result is normal.

Yes >> Go to step 5

No >> Go to step 3

3.Detects the input voltage of the low voltage distribution controller

1. Turn the key to "LOCK" or pull out;

2. Disconnect the low-voltage distribution controller connector;

3.Turn the key to ON.

4. Detect the voltage between the low-voltage distribution controller connector and ground;

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Low voltage distribution controller
Connector	Terminal number
F17	8	Ground	13V

Check if the result is normal.

Yes >> Repair or replace the low voltage distribution controller

No >> Repair or replace the wiring between the low voltage distribution controller and its fuse

4.Detects VCU's DC / DC enable output

1. Turn the key to "LOCK" or pull out;

2. Disconnect VCU connector ；

3.Turn the key to ON.

2. Detect the voltage between VCU and the DC / DC enable output and ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
VCU
Connector	Terminal number
F22	92	Ground	13V

Check if the result is normal.

Yes >> Replace DC / DC

No >> Replace VCU

5.Detect intermittent faults

Detect intermittent faults

Check if the result is normal.

No >> Refer to "Overview - Fault simulation test".

No >> Repair or replace the fault part

P0A94 DC/DC failure

DTC Logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P0A94

DC/DC failure

VCU detects that its power supply is lower than 11V for more than 2.5 seconds.

Wire harness or connector

DC/DC

DTC diagnostic procedures

1.Perform DTC confirmation procedure

1.Turn the key to ON.

2. Check the diagnostic results.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Check finished.

Diagnostic steps

1.Detects DC / DC output voltage

1.Turn the key to ON.

2. Detect the voltage between the DC / DC output and ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
DC/DC
Connector	Terminal number
F22	92	Ground	13V

Check if the result is normal.

Yes >> Go to step 2

No >> Go to step 4

2.Detects the output voltage of the low voltage distribution controller

1. Turn the key to "LOCK" or pull out;

2. Disconnect the connector between low-voltage distribution controller and VCU;

3.Turn the key to ON.

4. Detect the voltage between the low-voltage distribution controller connector and ground;

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Low voltage distribution controller
Connector	Terminal number
F17	10	Ground	13V

Check if the result is normal.

Yes >> Go to step 5

No >> Go to step 3

3.Detects the input voltage of the low voltage distribution controller

1. Turn the key to "LOCK" or pull out;

2. Disconnect the low-voltage distribution controller connector;

3.Turn the key to ON.

4. Detect the voltage between the low-voltage distribution controller connector and ground;

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Low voltage distribution controller
Connector	Terminal number
F17	8	Ground	13V

Check if the result is normal.

Yes >> Repair or replace the low voltage distribution controller

No >> Repair or replace the wiring between the low voltage distribution controller and its fuse

4.Detects VCU's DC / DC enable output

1. Turn the key to "LOCK" or pull out;

2. Disconnect VCU connector ；

3.Turn the key to ON.

2. Check the voltage between VCU and the DC / DC enable output and ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
VCU
Connector	Terminal number
F22	92	Ground	13V

Check if the result is normal.

Yes >> Replace DC / DC

No >> Replace VCU

5.Detect intermittent faults

Detect intermittent faults

Check if the result is normal.

No >> Refer to "Overview - Fault simulation test".

No >> Repair or replace the fault part

P0AA4 High-voltage positive relay failure

DTC Logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P0AA1

High voltage positive relay failure

When the high-voltage positive relay is disconnected only, the motor controller’s feedback voltage doesn’t reduce.

Wire harness or connector

High-voltage positive relay (inside the power pack)

DTC diagnostic procedures

1.Execute the DTC confirmation step

1.The key at "LOCK" or pull out; wait at least 100s.

2.Turn the key to ON.

3.检查DTC.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Check finished.

Diagnostic steps

1.Detect harness

1. Turn the key to "LOCK" or pull out;

2. Disconnect VCU harness connector.

3. Detect the voltage of the VCU harness connector and body ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
VCU harness connector
Connector	Terminal number
F22	107	Vehicle body ground	0V

Check if the result is normal.

Yes >> Check whether the high voltage positive relay is bonded.

No >> Repair or replace the VCU harness.

P0AA4 High voltage negative relay failure

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P0AA4

High voltage negative relay failure

When only the pre-charge relay is engaged, the motor controller feedback voltage is higher than a certain value.

Wire harness or connector

High voltage negative relay (inside the power pack)

DTC diagnostic procedures

1.Execute the DTC confirmation step

1.The key at "LOCK" or pull out; wait at least 100s.

2.Turn the key to ON.

3.检查DTC.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Check finished.

Diagnostic steps

1.Detect harness

1. Turn the key to "LOCK" or pull out;

2. Disconnect VCU harness connector.

3. Detect the voltage of the VCU harness connector and body ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
VCU harness connector
Connector	Terminal number
F22	99	Vehicle body ground	0V

Check if the result is normal.

Yes >> Check whether the high voltage negative relay is bonded.

No >> Repair or replace the VCU harness.

P0AA0 High voltage pre-charge relay failure

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P0AA0

High voltage pre-charge relay failure

When only the pre-charge relay is engaged, the motor controller feedback voltage is higher than a certain value.

Wire harness or connector.

High voltage negative relay (inside the power pack)

DTC diagnostic procedures

1.Execute the DTC confirmation step

1.The key at "LOCK" or pull out; wait at least 100s.

2.Turn the key to ON.

3.检查DTC.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Check finished.

Diagnostic steps

1.Detect harness

1. Turn the key to "LOCK" or pull out;

2. Disconnect VCU harness connector.

3. Detect the voltage of the VCU harness connector and body ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
VCU harness connector
Connector	Terminal number
F22	100	Vehicle body ground	0V

Check if the result is normal.

Yes >> Check whether the high voltage negative relay is bonded.

No >> Repair or replace the VCU harness.

P2122，P2123 Accelerator pedal first sensor failure

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P2122

Accelerator pedal first sensor short circuit to ground

VCU detects the accelerator pedal first sensor signal voltage is too low.

Harness or connector (accelerator pedal first sensor circuit open or shorted)

Accelerator pedal first sensor

P2123

Accelerator pedal first sensor short circuit to battery

VCU detects the accelerator pedal first sensor signal voltage is too high.

DTC diagnostic procedures

1.Execute the DTC confirmation step

1.Turn the key to ON.

2. Check the diagnostic results.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Detection finished.

Diagnostic steps

1.Detect the accelerator pedal first sensor supply voltage 1

1. Turn the key to "LOCK" or pull out;

2. Check diagnostic results.

3.Turn the key to ON.

4.Detect the accelerator pedal first sensor supply voltage

Accelerator pedal first sensor			Voltage value (approx.)
Connector	Multimeter positive lead	Multimeter negative lead
	Terminal number
F15	2	3	5V

Check if the result is normal.

Yes >> Go to step 6

No >> Go to step 2

2.Detect the accelerator pedal first sensor supply voltage 2

Detect the accelerator pedal first sensor positive powe supply

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Accelerator pedal first sensor
Connector	Terminal number
F15	2	Ground	5V

Check if the result is normal.

Yes >> Go to step 4

No >> Go to step 3

3.Detect the accelerator pedal first sensor positive power supply harness

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU harness connector.

3.Detect the accelerator pedal first sensor positive power supply harness.

Multimeter positive lead		Multimeter negative lead		Connectivity
Accelerator pedal first sensor		VCU
Connector	Terminal number	Connector	Terminal number
F15	2	F23	112	Conduction

4. Also check whether the harness is shorted to power or ground.

Check if the result is normal.

Yes >>Detect low-voltage distribution controller power supply.

No >> Repair or replace the accelerator pedal.

4.Check the negative power-supply harness of accelerator pedal first sensor

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU harness connector.

3.Detect the accelerator pedal first sensor negative power supply harness

Multimeter positive lead		Multimeter negative lead		Connectivity
Accelerator pedal first sensor		VCU
Connector	Terminal number	Connector	Terminal number
F15	3	F22	72	Conduction

4. Also check whether the harness is shorted to power.

Check if the result is normal.

Yes>> GO to step 5.

No >> Repair or replace the accelerator pedal.

5.Check VCU negative power-supply circuit

Detect VCU negative power supply circuit

Multimeter positive lead		Multimeter negative lead	Connectivity
VCU
Connector	Terminal number
F22	1	Ground	Conduction
	9
	47
	66

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Refer to "VCU Check Procedure" below.

6.Check the output harness of accelerator pedal first sensor

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU harness connector.

3.Detect the accelerator pedal first sensor output harness

Multimeter positive lead		Multimeter negative lead		Connectivity
Accelerator pedal first sensor		VCU
Connector	Terminal number	Connector	Terminal number
F15	4	F22	34	Conduction

4. Also check whether the harness is shorted to power or ground.

Check if the result is normal.

Yes>> GO to step 7.

No >> Repair or replace the accelerator pedal.

7.Check the accelerator pedal first sensor

According to "Component detection (accelerator pedal first sensor)".

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Repair or replace the accelerator pedal. Refer to the accelerator pedal dismantling guide.

Component detection (accelerator pedal first sensor)

Detect the accelerator pedal first sensor

1. Turn the key to "LOCK" or pull out.

2. Reconnect all disconnected harness connectors.

3.Turn the key to ON.

4. Check the voltage of the VCU connectors under the following conditions:

VCU			Condition		Voltage value (V)
Connector	Multimeter positive lead	Multimeter negative lead
	Terminal number	Terminal number
F22	34	Ground	Accelerator pedal	Full release	0.75±0.1
				Full pressed	4.45±0.2
	15			Full release	0.375±0.1
				Full pressed	2.225±0.2

Check if the result is normal.

Yes >> Detection is finished.

No >> Replace the accelerator pedal. Refer to the “accelerator pedal dismantling guide”.

P2127，P2128 Accelerator pedal second sensor failure

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P2127

Accelerator pedal second sensor short circuit to ground

VCU detects the accelerator pedal second sensor signal voltage is too low.

Harness or connector (accelerator pedal second sensor circuit open or shorted)

Accelerator pedal second sensor

P2128

Accelerator pedal second sensor short circuit to battery

VCU detects the accelerator pedal second sensor signal voltage is too low.

DTC diagnostic procedures

1.Perform DTC confirmation procedure

1.Turn the key to ON.

2. Check diagnostic results.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Detection finished.

Diagnostic steps

1.Detect the accelerator pedal second sensor supply voltage 1

1. Turn the key to "LOCK" or pull out the key.

2. Check diagnostic results.

3.Turn the key to ON.

4.Detect the accelerator pedal first sensor supply voltage.

Accelerator pedal second sensor			Voltage value (approx.)
Connector	Multimeter positive lead	Multimeter negative lead
	Terminal number
F15	1	5	5V

Check if the result is normal.

Yes >> Go to step 6

No >> Go to step 2

2.Detect the accelerator pedal second sensor positive supply voltage 2

Detect the accelerator pedal second sensor positive power supply

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Accelerator pedal second sensor
Connector	Terminal number
F15	1	Ground	5V

Check if the result is normal.

Yes >> Go to step 4

No >> Go to step 3

3.Detect the accelerator pedal second sensor positive power supply harness

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU harness connector.

3. Detect the accelerator pedal second sensor positive power supply harness.

Multimeter positive lead		Multimeter negative lead		Connectivity
Accelerator pedal second sensor		VCU
Connector	Terminal number	Connector	Terminal number
F15	1	F23	104	Conduction

4. Also check whether the harness is shorted to power or ground.

Check if the result is normal.

Yes >> Detect the self-sustaining relay power supply.

No >> Repair or replace the harness.

4.Check the accelerator pedal second sensor negative power-supply harness

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU harness connector.

3.Detect the accelerator pedal second sensor negative power supply harness

Multimeter positive lead		Multimeter negative lead		Connectivity
Accelerator pedal second sensor		VCU
Connector	Terminal number	Connector	Terminal number
F15	5	F22	53	Conduction

4. Also check whether the harness is shorted to power.

Check if the result is normal.

Yes >> Go to step 5

No >> Repair or replace the harness.

5.Check VCU negative power-supply circuit

Detect VCU negative power supply circuit

Multimeter positive lead		Multimeter negative lead	Connectivity
VCU
Connector	Terminal number
F22	1	Ground	Conduction
	9
	47
	66

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Refer to "VCU Check Procedure" below.

6.check the accelerator pedal second sensor output harness

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU harness connector.

3. Detect the accelerator pedal second sensor output harness

Multimeter positive lead		Multimeter negative lead		Connectivity
Accelerator pedal second sensor		VCU
Connector	Terminal number	Connector	Terminal number
F15	6	F22	15	Conduction

4. Also check whether the harness is shorted to power or ground.

Check if the result is normal.

Yes >> Go to step 7

No >> Repair or replace the harness.

7.check the accelerator pedal second sensor

According to "Component detection (accelerator pedal second sensor)".

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Repair or replace the accelerator pedal. Refer to the accelerator pedal dismantling guide.

Component detection (accelerator pedal second sensor)

Detect the accelerator pedal second sensor

1. Turn the key to "LOCK" or pull out.

2. Reconnect all disconnected harness connectors.

3.Turn the key to ON.

4. Check the voltage of the VCU connectors under the following conditions:

VCU			Condition		Voltage value (V)
Connector	Multimeter positive lead	Multimeter negative lead
	Terminal number	Terminal number
F22	34	1	Accelerate pedal	Full release	0.75±0.1
				Full pressed	4.45±0.2
	15			Full release	0.375±0.1
				Full pressed	2.225±0.2

Check if the result is normal.

No >> Detection finished.

No >> Replace the accelerator pedal. Refer to the “accelerator pedal dismantling guide”.

P2138 Accelerator pedal ratio failure

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P2138

Accelerator pedal ratio failure

VCU diagnoses the abnormal acceleration pedal first and second sensor signals at the same time

Harness or connector (accelerator pedal first or second sensor circuit open or shorted)

The acceleration pedal sensor

DTC diagnostic procedures

1.Perform DTC confirmation procedure

1.Turn the key to ON.

2. Check the diagnostic results.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Detection finished.

Diagnostic steps

1.Detect VCU power supply circuit

1. Turn the key to "LOCK" or pull out the key.

2. Disconnect VCU harness connector.

3. Detect the connectivity of the VCU harness connector and ground.

Multimeter positive lead		Multimeter negative lead	Connectivity
VCU
Connector	Terminal number
F22	1	Ground	Conduction
	9
	47
	66

Check if the result is normal.

Yes >> Go to step 2

No >> Repair or replace the VCU harness.

2.Detect the accelerator pedal signal circuit

1. Disconnect the accelerator pedal sensor harness connector.

2. Detect the connectivity of the accelerator pedal sensor to the end.

The acceleration pedal sensor			Connectivity
Connector	Multimeter positive lead	Multimeter negative lead
	Terminal number
F15	4	6	Conduction

Check if the result is normal.

Yes >> Go to step 3

No >> Repair or replace the accelerator sensor harness.

3.Detect the accelerator pedal sensor

Refer to “Component detection (accelerator pedal sensor)”

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Replace the accelerator pedal.

Component detection (accelerator pedal sensor)

1.Detect the accelerator pedal sensor

1. Turn the key to "LOCK" or pull out.

2. Reconnect all disconnected harness connectors.

3.Turn the key to ON.

4. Check the voltage of the VCU connectors under the following conditions:

VCU			Condition		Voltage value (V)
Connector	Multimeter positive lead	Multimeter negative lead
	Terminal number	Terminal number
F22	34	1	Accelerate pedal	Full release	0.75±0.1
				Full pressed	4.45±0.2
	15			Full release	0.375±0.1
				Full pressed	2.225±0.2

Check if the result is normal.

No >> Detection finished.

No >> Replace the accelerator pedal. Refer to the “accelerator pedal dismantling guide”.

P3012 Motor controller failure

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P3012

Motor controller failure

When the MC relay is engaged, the motor controller does not send a message.

Wire harness or connector

Motor controller

DTC diagnostic procedures

1.Execute the DTC confirmation step

1.The key at "LOCK" or pull out; wait at least 5s.

2.Turn the key to ON.

3.CheckDTC.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Check finished.

Diagnostic steps

1.Detects motor controller power supply

1. Disconnect the motor controller harness connector.

2.Turn the key to ON.

3. Detect the voltage of the VCU harness connector and body ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
The motor controller harness connector
Connector	Terminal number
FC01	1 and 2	Vehicle body ground	12V

Check if the result is normal.

Yes >> Replace the motor controller

No >> Repair or replace the motor controller supply harness.

P3013 Motor controller failure

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P3013

Motor controller failure

When the MC relay is engaged, the motor controller does not send a message.

Wire harness or connector

Battery controller

DTC diagnostic procedures

1.Execute the DTC confirmation step

1.The key at "LOCK" or pull out; wait at least 5s.

2.Turn the key to ON.

3.CheckDTC.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Check finished.

Diagnostic steps

1.Detect motor controller power supply

1. Disconnect the battery controller harness connector.

2.Turn the key to ON.

3. Detect the voltage of the VCU harness connector and body ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
The battery controller harness connector
Connector	Terminal number
F17	V	Vehicle body ground	12V

Check if the result is normal.

Yes >> Replace the battery controller

No >> Repair or replace the battery controller supply harness.

P3015, P3016, P3017 High voltage circuit fault

DTC logic

DTC diagnostic logic

DTC number	Failure Name	DTC diagnostic conditions	The possible causes for failure
P3015	High voltage loop failure	The following conditions last for 0.2 seconds: Power battery current above 5A The motor controller feedback voltage is less than 24V Pre-charging in process	High voltage wiring harness High voltage junction box
P3016		The following conditions last for 0.5 seconds: Power battery current below 5A The motor controller feedback voltage is less than 24V Pre-charging in process	High voltage wiring harness High voltage junction box
P3017		The following conditions last for 0.5 seconds: Power battery voltage and motor controller feedback voltage difference is higher than 100V Precharging process	High voltage wiring harness High voltage junction box Battery controller

DTC diagnostic procedures

1.Execute the DTC confirmation step

1.The key at "LOCK" or pull out; wait at least 100s.

2.Turn the key to ON.

3.Check DTC.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Check finished.

Diagnostic steps

Warning:

As the electric vehicle contains a high voltage battery, if the high pressure components and vehicles are handled incorrectly, there is a risk of electric shock, shock, leakage or similar accidents, so be sure to follow the correct procedures to check and maintain.

Before the maintenance switch is disconnected, the key must be placed in the "LOCK" or unplugged.

Check or maintain the high pressure system before disconnecting the service switch. And no one is allowed to turn off the maintenance switch during the inspection and maintenance process. Before starting the high voltage system operation, be sure to wear insulation protection equipment, including gloves, shoes and glasses.

Make sure other people will not touch the vehicle while service personnel is operating high-pressure system. When maintenance work is suspended, the high-voltage part should be under insulation protection to prevent other people from touching.

When the maintenance switch is disconnected, the key is forbidden to "ON" or "START".

1.Preparation

Warning:

Disconnect the high voltage circuit, see "Overview - High voltage disconnection process"

Detect the high voltage circuit voltage. (After the internal motor capacitance discharge)

Disconnect the high voltage harness connector at the end of the battery pack.

DANGER: If you do not wear the appropriate protective equipment and touch the high-voltage parts, it will produce electric shock hazard.

Detect the high voltage circuit voltage.

DANGER: If you do not wear the appropriate protective equipment and touch the high-voltage parts, it will produce electric shock hazard.

Note：

For high voltage measurements,please use a tool that can detect more than 500V.

>> Go to step 2

2.Detect DTC

Check other DTCs.

Are there any other DTCs?

Yes >> Check DTC. Refer to "VCU fault citation".

No >> Go to step 3.

3.Check the power battery self-test results

Check the power battery self-test results with the detection tool.

Whether DTC is detected ?

Yes >> Check DTC. Refer to "LBC fault citation".

No >> Go to step 4

4.Check the motor self-test results

Check the motor self-test results with the detection tool.

Whether DTC is detected ?

Yes >> Check DTC. Refer to "PCU fault citation".

No >> Go to step 5

5.Check the vehicle charger self-test results

Check the vehicle charger self-test results with the detection tool.

Whether DTC is detected ?

Yes >> Check DTC. Refer to "OBC fault citation".

No >> Go to step 6

6.Check the air conditioning compressor self-test results

Check the motor self-test results with the detection tool.

Whether DTC is detected ?

Yes >> Check DTC. Refer to "Air conditioning compressor failure reference".

No >> Go to step 7

7.Check the high voltage circuit fuse

1. Disconnect all high-voltage harness connectors around the high-voltage junction box.

2. Measure the continuity of the high voltage positive pole and the circuit on the power battery of the high voltage junction box.

Whether the internal high voltage junction box is turned on?

Yes >>Check finished.

No >>Replace high voltage junction box.

P3010 Vehicle crash failure

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P3010

Vehicle collision failure

The VCU receives the collision signal sent by the airbag controller.

The airbag was exploded

Airbag crash sensor

VCU

DTC diagnostic procedures

1.Execute the DTC confirmation step

Check if the airbag is exploded?

Yes >> Refer to "Airbag activation".

No >> Go to step 2.

2.Execute the DTC confirmation step

1.The key at "LOCK"; wait at least 20s.

1.The key at "ON"; wait at least 5s.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Check finished.

Diagnostic steps

1.Replace the airbag controller

Replace the airbag controller

Whether DTC is detected ?

Yes >> Replace VCU

No >>Check finished.

P3006, P3007, P3008, P3009 Shift mechanism failure

DTC logic

DTC diagnostic logic

DTC number	Failure Name	DTC diagnostic conditions	The possible causes for failure
P3006	Shift the first signal is abnormal	VCU diagnosis shift the first signal voltage is not within a reasonable range.	Wire harness or connector Shift mechanism VCU
P3007	Shift the second signal is abnormal	VCU diagnosis shift the second signal voltage is not within a reasonable range.
P3008	Shift the third signal is abnormal	VCU diagnosis shift the third signal voltage is not within a reasonable range.
P3009	Shift the forth signal is abnormal	VCU diagnosis shift the forth signal voltage is not within a reasonable range.

DTC diagnostic procedures

1.Execute the DTC confirmation step

"D" or "R" gear detection:

1. Tighten the handbrake.

1.The key at "LOCK" or pull out; wait at least 5s.

3.Turn the key to ON.

4. Place the gear shife in "D" or "R".

5. Check diagnostic results.

Whether DTC is detected ?

Yes >> Go to the following "Diagnostic steps".

No >> Detection finished.

Diagnostic steps

Tip: Before performing the diagnosis, please check whether the 12V battery voltage is normal. If normal, please implement the following steps; otherwise ensure that 12V battery power supply after the normal diagnosis.

1.Check the power-supply voltage 1 of 12V battery to the shift mechanism

1. Turn the key to "LOCK" or pull out.

2. Disconnect the gearshift connector.

3.Turn the key to ON.

4. Detect the voltage between the connector terminals of the shift mechanism.

Shift mechanism			Voltage value (around)
Connector	Multimeter positive lead	Multimeter negative lead
	Terminal number
F18	1	3	12V

Check if the result is normal.

Yes >> Go to step 6

No >> Go to step 2

2.Check the shift mechanism supply voltage 2

Detect the voltage between the shift mechanism positive and body ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (around)
Shift mechanism
Connector	Terminal number
F18	1	Vehicle body ground	12V

Check if the result is normal.

Yes >> Go to step 3.

No >> Repair or replace the fault part.

3.Check 12V battery to the shift mechanism power supply circuit

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU connector.

3. Detection of 12V battery to the shift mechanism power supply circuit insurance "fuse" situation.

Multimeter positive lead		Multimeter negative lead		Connectivity
Front cabin fuse box		Front cabin fuse box
Connector	Terminal number	Connector	Terminal number
ER16#	1	ER16#	2	Conduction

Check if the result is normal.

Yes >> Go to step 4

No >> Repair or replace the fault part.

4.Check 12V battery to the shift mechanism power supply circuit harness

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU connector.

3.Detect 12V battery to the shift mechanism power supply circuit.

Multimeter positive lead		Multimeter negative lead		Connectivity
Shift mechanism		Front cabin fuse box
Connector	Terminal number	Insurance	Terminal number
F18	1	ER16#	1	Conduction

4. Also check whether the harness is shorted to power or ground.

Check if the result is normal.

Yes >>Detect low-voltage distribution controller power supply.

No >>repair or replace the failed parts。

5.Detection of gearshift mechanism grounding circuit

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU connector.

3.Detect the gearshift mechanism grounding circuit.

Multimeter positive lead		Multimeter negative lead	Voltage value (around)
Shift mechanism
Connector	Terminal number
F18	1	Vehicle body ground	12V

4. Also check whether the harness is shorted to power.

Check if the result is normal.

Yes>> GO to step 6.

No >> Repair or replace the fault part.

6.Check of shift mechanism terminal 5V power supply 1

1. Turn the key to "LOCK" or pull out.

2. Detect the 5V supply voltage of the shift mechanism terminal.

Multimeter positive lead		Multimeter negative lead		Voltage value (around)
Shift mechanism		Shift mechanism
Connector	Terminal number	Connector	Terminal number
F18	2	F18	3	5V
	4
	6
	8

4. Also check whether the harness is shorted to power.

Check if the result is normal.

Yes>> GO to step 7.

No >> Repair or replace the fault part.

7.Check of shift mechanism terminal 5V power supply 2

1. Turn the key to "LOCK" or pull out.

2. Detect the 5V supply voltage of the shift mechanism.

Multimeter positive lead		Multimeter negative lead	Voltage value (around)
Shift mechanism
Connector	Terminal number
F18	2	Vehicle body ground	5V
	4
	6
	8

4. Also check whether the harness is shorted to power.

Check if the result is normal.

Yes>> GO to step 8.

No >> Repair or replace the fault part.

8.Check of shift mechanism sensor output circuit

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU connector.

3.Detect shift mechanism forth sensor output circuit.

Multimeter positive lead		Multimeter negative lead		Connectivity
Shift mechanism		VCU
Connector	Terminal number	Connector	Terminal number
F18	2	F23	14	Conduction
	4		33	Conduction
	6		52	Conduction
	8		71	Conduction

4. Also check whether the harness is shorted to power or ground.

Check if the result is normal.

Yes>> GO to step 9.

No >> Repair or replace the fault part.

9.Check gearshift mechanism

Refer to "Component Detection (Shift Mechanism)" below.

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Repair or replace the fault part. Refer to the shift mechanism dismantling guide.

Component Detection (Shift Mechanism)

Detect the shift mechanism first sensor

1. Turn the key to "LOCK" or pull out.

2. Reconnect all disconnected harness connectors.

3.Turn the key to ON.

4. Check the voltage of the VCU connectors under the following conditions:

VCU			Condition		Voltage value (V)
Connector	Multimeter positive lead	Multimeter negative lead
	Terminal number	Terminal number
F23	14	Ground	Shift mechanism	D gear	1.75±0.5%
	33				3.20±0.5%
	52				1.75±0.5%
	71				3.20±0.5%
	14			"R" gear	3.20±0.5%
	33				3.20±0.5%
	52				1.75±0.5%
	71				1.75±0.5%

Check if the result is normal.

Yes >> Detection is finished.

No >> Replace shift mechanism. Refer to the shift mechanism dismantling guide.

Tip: shift mechanism output signal has four. If you want to confirm the other three, the method are the same.

P300C，P300D，P300E Battery controller message-missing fault

Note: Before checking this fault, check the MC relay fault and the CAN line fault first.

DTC logic

DTC diagnostic logic

DTC number	Failure Name	DTC diagnostic conditions	The possible causes for failure
P300C	Battery controller message-missing fault	After the battery controller is initialized, the packets sent by the vehicle controller are lost.	LBC VCU
P300D
P300E

DTC diagnostic procedures

1.Execute the DTC confirmation step

1.Turn the key to ON.

2.CheckDTC.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Detection finished.

Diagnostic steps

1.Detect DTC

Perform VCU self-diagnosis function. Refer to the electric vehicle control system. “Diagnostic tool function”.

Is there any other DTC other than P300C, P300D, P300E detected?

Yes >> Replace VCU. Refer to electric vehicle control system. “VCU: disassembly and assembly”.

No >> Replace LBC. Refer to the power battery control system. “LBC: disassembly and assembly”.

P300F Motor controller message-missing fault

Note: Before checking this fault, check the MC relay fault and the CAN line fault first.

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P300F

Motor controller message missing fault

After the battery controller is initialized, the packets sent by the vehicle controller are lost.

PCU

VCU

DTC diagnostic procedures

1.Execute the DTC confirmation step

1.Turn the key to ON.

2.CheckDTC.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Detection finished.

Diagnostic steps

1.Detect DTC

Perform VCU self-diagnosis function. Refer to the electric vehicle control system. “Diagnostic tool function”.

Is there any other DTC other than P300E detected?

Yes >> Replace VCU Refer to electric vehicle control system. “VCU: disassembly and assembly”.

No >> Replace PCU. Refer to the power battery control system. “LBC: disassembly and assembly”.

P301F Car charger controller message loss fault

Note: Check the CAN line before checking this fault.

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P301F

Charger controller message-missing fault

After the battery controller is initialized, the packets sent by the vehicle controller are lost.

Car Charger

VCU

DTC diagnostic procedures

1.Execute the DTC confirmation step

1. Connect the portable charging harness to the AC charging pile or household power outlet.

2.CheckDTC.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Detection finished.

Diagnostic steps

1.Detect DTC

Perform VCU self-diagnosis function. Refer to the electric vehicle control system. “Diagnostic tool function”.

Is there any other DTC other than P301F detected?

Yes >> Replace VCU Refer to electric vehicle control system. “VCU: disassembly and assembly”.

No >> Replace OBC. Refer to the car charger control system. “OBC: disassembly and assembly”.

P3020 Charger pile message-missing fault

Note: Check the CAN line before checking this fault.

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P3020

Charger pile message-missing fault

After the charging pile is initialized, the packets sent by the vehicle controller are lost.

Charging pile

VCU

DTC diagnostic procedures

1.Execute the DTC confirmation step

1. Connect the portable charging harness to the AC charging pile.

2.CheckDTC.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Detection finished.

Diagnostic steps

1.Detect DTC

Perform VCU self-diagnosis function. Refer to the electric vehicle control system. “Diagnostic tool function”.

Is there any other DTC other than P3020 detected?

Yes >> Replace VCU Refer to electric vehicle control system. “VCU: disassembly and assembly”.

No >> Replace charging pile.

P3014 M/C relay

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P3014

M/C relay failure

After the key is placed in the "ON" block, the VCU detects that the LBC and PCU have not sent a message to the CAN bus.

Wire harness or connector

Fuse

M/C relay

DTC diagnostic procedures

1.Execute the DTC confirmation step

1.Turn the key to ON.

2. Check diagnostic results.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Detection finished.

Diagnostic steps

1.Check of M / C relay control circuit

1. Turn the key to "LOCK" or pull out.

2. Remove M/C relay.

3. Detect the M / C relay connector pin voltage

M/C relay connector			Voltage value (approx.)
Multimeter	Multimeter positive lead	Multimeter negative lead
	Terminal number
Connector number	2	3	0V

4.Turn the key to ON.

5. Detect the M / C relay connector pin voltage

M/C relay connector			Voltage value (approx.)
Multimeter	Multimeter positive lead	Multimeter negative lead
	Terminal number
Connector number	2	3	12V battery voltage

Check if the result is normal.

Yes >> Go to step 9

No >> Go to step 2

2.Detection of M / C relay power supply -1

Detects the voltage between the M / C relay connector pin and the vehicle body ground

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
M/C relay
Connector	Terminal number
F15	2	Vehicle body ground	12V battery voltage

Check if the result is normal.

Yes>> GO to step 6.

No >> Go to step 3

3.Detect the fuse

1.Remove M/C relay fuse.

2.Check if the fuses are blown.

Check if the result is normal.

Yes >> Go to step 4

No >> Replace the fuse.

4.Detection of M / C relay power supply -2

Check the voltage between the fuse connector and the vehicle body

Multimeter positive lead	Multimeter negative lead	Voltage value (approx.)
Fuse terminal	Vehicle body ground	12V battery voltage

Check if the result is normal.

Yes>> GO to step 5.

No >> Detects the circuit between the low-voltage distribution controller output and M/C.

5.Detection of M / C relay power supply -1

1. Detect the harness connection between the M / C relay connector and the fuse

Multimeter positive lead	Multimeter negative lead		Connectivity
	M/C relay
	Connector	Terminal number
Fuse terminal	F22	2	Conduction

2. Check harness for continuity with power supply and ground.

Check if the result is normal.

Yes >> Go to "routine check".

No >> Repair or replace the fault part.

6.Check of M/C relay control signal circuit

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU harness connector.

3. Detect the connection between the M / C relay connector terminal and the VCU connector terminal.

Multimeter positive lead		Multimeter negative lead		Connectivity
M/C relay		VCU
Connector	Terminal number	Connector	Terminal number
F15	1	F22	34	Conduction

4. Also check whether the harness is shorted to power or ground.

Check if the result is normal.

Yes >> Go to step 7.

No >> Repair or replace the fault part.

7.Check VCU power supply circuit

Detect the voltage difference between the VCU connector and the vehicle body.

Multimeter positive lead		Multimeter negative lead	Connectivity
VCU
Connector	Terminal number
F21	1	Vehicle body ground	Conduction
F21	9
F21	47
F21	66

Check if the result is normal.

Yes >> Go to step 8.

No >> Repair or replace the fault part.

8.Fault simulation test

Refer to "Overview - Fault simulation test"

Check if the result is normal.

Yes >> Replace VCU.

No >> Repair or replace the fault part.

9.Detection of M / C relay power supply -3

Detects the voltage between the M / C relay connector pin and the vehicle body ground

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
M/C relay
Connector	Terminal number
MC01	3	Ground	12V battery voltage

Check if the result is normal.

Yes >> Go to step 11.

No >> Go to step 10

10.Detection of M / C relay power supply -2

1. Detect the harness connection between the M / C relay connector and the fuse

Multimeter positive lead	Multimeter negative lead		Connectivity
	M/C relay
	Connector	Terminal number
Fuse terminal	MC01	3	Conduction

2. Check harness for continuity with power supply and ground.

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Repair or replace the fault part.

11.Check M / C relay

Check if the result is normal.

Yes >> Detection is finished.

No >> Repair or replace the fault part.

Component detection (M / C relay)

Detection of M / C relay

1. Turn the key to "LOCK" or pull out.

2. Remove M/C relay.

3. Check the continuity of the pins of the M / C relay.

Interface	Condition	Connectivity
Interface 3 and 5	Pin 1 and 2 has direct current	Conduction
Interface 3 and 5	No direct current	No conduction

Check if the result is normal.

Yes >> Detection is finished.

No >> Replace the M/C relay.

P3011 High voltage interlock fault

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P3011

The high voltage interlock failure

After the MC relay is engaged, the VCU diagnoses the high voltage interlock signal for a low level for 2.5 seconds.

Wire harness or connector

High voltage harness or connector

DTC diagnostic procedures

1.Execute the DTC confirmation step

1.The key at "ON"; wait at least 5s.

2.CheckDTC.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Check finished.

Diagnostic steps

Warning:

Before the maintenance switch is disconnected, the key must be placed in the "LOCK" or unplugged.

When the maintenance switch is disconnected, the key is forbidden to "ON" or "START".

1.Preparation

Warning:

Disconnect the high voltage circuit, see "Overview - High voltage disconnection process"

Detect the high voltage circuit voltage. (After the internal motor capacitance discharge)

1.Disconnect the high voltage harness connector at the end of the battery pack.

DANGER: If you do not wear the appropriate protective equipment and touch the high-voltage parts, it will produce electric shock hazard.

2.Detect the high voltage circuit voltage.

DANGER: If you do not wear the appropriate protective equipment and touch the high-voltage parts, it will produce electric shock hazard.

Note：

For high voltage measurements,please use a tool that can detect more than 500V.

>> Go to step 2

2.Check the installation of the high-voltage harness connector

Check the high voltage wiring harness and power battery between the high-voltage wiring harness wear and withdrawal of the needle situation.

Note：

When reconnecting the high-voltage harness connector, the plugs are aligned with each other and slowly tighten them.

Check if the result is normal.

Yes >> Go to step 3

No >> Repair or replace the fault part.

3.Detect power battery low voltage harness power supply

1. Disconnect the battery low voltage harness connector.

2.Turn the key to ON.

3.Detect power battery low voltage harness power supply

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
Battery low voltage harness connector.
Connector	Terminal number
F18	V	Vehicle body ground	12V

Check if the result is normal.

Yes >> Go to step 7

No >> Go to step 4

4.Detect high-voltage junction box low-voltage wire harness power supply

1: Place the key in the "LOCK".

2. Disconnect the high-voltage junction box low-voltage harness connector.

3.Turn the key to ON.

4.Detect high-voltage junction box low-voltage wire harness power supply

Multimeter positive lead		Multimeter negative lead	Voltage value (approx.)
The high-voltage junction box low-voltage harness connector.
Connector	Terminal number
FC03	7	Vehicle body ground	12V

Check if the result is normal.

Yes >> Go to step 5

No >> Go to step 6

5.Detect power battery low voltage harness circuit

1: Place the key in the "LOCK".

2.Detect power battery low voltage harness circuit

Multimeter positive lead		Multimeter negative lead		Connectivity
The high-voltage junction box low-voltage harness connector.		Battery low voltage harness connector.
Connector	Terminal number	Connector	Terminal number
FC03	8	F18	R	Conduction

Check if the result is normal.

Yes >> Replace high voltage junction box.

No >> Repair or replace the fault part.

6.Detect high-voltage junction box low-voltage wire harness circuit

1: Place the key in the "LOCK".

2.Detect power battery low voltage harness circuit

Multimeter positive lead		Multimeter negative lead		Connectivity
The high-voltage junction box low-voltage harness connector.		M/C relay
Connector	Terminal number	Connector	Terminal number
FC03	8	-	PU01	Conduction

Check if the result is normal.

Yes >> Refer to "M / C Relay Diagnostic Procedure".

No >> Repair or replace the fault part.

7.Detect power battery low voltage circuit

1: Place the key in the "LOCK".

2. Disconnect VCU connector.

3.Detect power battery low voltage circuit.

Multimeter positive lead		Multimeter negative lead		Connectivity
Power battery connector		VCU connector
Connector	Terminal number	Connector	Terminal number
F18	R	F21	39	Conduction

Check if the result is normal.

Yes >> Replace the power battery.

No >> Repair or replace the fault part.

P301A High voltage loop failure

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P301A

High voltage loop failure

When the key is set to "ON", the motor controller feedback voltage is abnormal.

High voltage harness or connector

High voltage junction box

PCU

DTC diagnostic procedures

1.Execute the DTC confirmation step

1.The key at "ON"; wait at least 5s.

2.CheckDTC.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Check finished.

Diagnostic steps

Warning:

Before the maintenance switch is disconnected, the key must be placed in the "LOCK" or unplugged.

When the maintenance switch is disconnected, the key is forbidden to "ON" or "START".

1.Preparation

Warning:

Disconnect the high voltage circuit, see "Overview - High voltage disconnection process"

Detect the high voltage circuit voltage. (After the internal motor capacitance discharge)

1.Disconnect the high voltage harness connector at the end of the battery pack.

DANGER: If you do not wear the appropriate protective equipment and touch the high-voltage parts, it will produce electric shock hazard.

2.Detect the high voltage circuit voltage.

DANGER: If you do not wear the appropriate protective equipment and touch the high-voltage parts, it will produce electric shock hazard.

Note：

For high voltage measurements,please use a tool that can detect more than 500V.

>> Go to step 2

2.Check the installation of the high-voltage harness connector

Check the PCU high-voltage wire harness head wear and withdrawal needle situation.

Note：

When reconnecting the high-voltage harness connector, the plugs are aligned with each other and slowly tighten them.

Check if the result is normal.

Yes >> Go to step 3

No >> Repair or replace the fault part.

3.Check the fuse situation in the high voltage junction box

1. Disconnect the high voltage junction box and the power battery terminal high voltage wiring harness.

2. Check the PCU circuit fuse in the high voltage junction box.

Check if the result is normal.

Yes >> Replace PCU.

No >>Replace high voltage junction box.

P301B Air conditioning compressor high voltage circuit failure

DTC logic

DTC diagnostic logic

DTC number

Failure Name

DTC diagnostic conditions

The possible causes for failure

P301B

Air conditioning compressor high voltage circuit failure

When the key is set to "ON", the AC compressor feedback voltage is abnormal.

High voltage harness or connector

High voltage junction box

Air conditioning compressor controller

DTC diagnostic procedures

1.Execute the DTC confirmation step

1.The key at "ON"; wait at least 5s.

2.CheckDTC.

Whether DTC is detected ?

Yes >> Refer to "Diagnostic Procedure" below.

No >> Check finished.

Diagnostic steps

Warning:

Before the maintenance switch is disconnected, the key must be placed in the "LOCK" or unplugged.

When the maintenance switch is disconnected, the key is forbidden to "ON" or "START".

1.Preparation

Warning:

Disconnect the high voltage circuit, see "Overview - High voltage disconnection process"

Detect the high voltage circuit voltage. (After the internal motor capacitance discharge)

1.Disconnect the high voltage harness connector at the end of the battery pack.

DANGER: If you do not wear the appropriate protective equipment and touch the high-voltage parts, it will produce electric shock hazard.

2.Detect the high voltage circuit voltage.

DANGER: If you do not wear the appropriate protective equipment and touch the high-voltage parts, it will produce electric shock hazard.

Note：

For high voltage measurements,please use a tool that can detect more than 500V.

>> Go to step 2

2.Check the installation of the high-voltage harness connector

Check the AC compressor high-voltage wire harness head wear and withdrawal needle situation.

Note：

When reconnecting the high-voltage harness connector, the plugs are aligned with each other and slowly tighten them.

Check if the result is normal.

Yes >> Go to step 3

No >> Repair or replace the fault part.

3.Check the fuse situation in the high voltage junction box

1. Disconnect the high voltage junction box and the power battery terminal high voltage wiring harness.

2. Check the high-voltage junction box air conditioning compressor circuit fuse situation.

Check if the result is normal.

Yes >>Replace the air conditioning compressor.

No >>Replace high voltage junction box.

Cooling fan

Component function detection

1.Detect the cooling fan function

Reference

1.Turn the key to ON.

2. Open air conditioning refrigeration.

3. Detect the cooling fan function.

Check if the result is normal.

Yes >> Detection is finished.

No >> Refer to "Diagnostic Flow" on the next page.

Diagnostic steps

1.Check the cooling fan control module power supply

1. Turn the key to "LOCK" or pull out.

2. Disconnect the cooling fan control module connector.

3. Turn the key to ON.

4. Detect the voltage between the cooling fan control module connector and ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (around)
Cooling fan control module
Connector	Terminal number
F09	1	Vehicle body ground	12V battery voltage

Check if the result is normal.

Yes >> Go to step 10.

No >> Go to step 2.

2.Detect battery power supply

1. Turn the key to "LOCK" or pull out.

2. Remove the cooling fan relay.

3. Check the voltage between the cooling fan relay connector and ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (around)
Cooling fan relay.
Connector	Terminal number
ER07	85	Vehicle body ground	12V battery voltage

Check if the result is normal.

Yes >> Go to step 3.

No >> Check the battery power supply circuit.

3.Detection of M / C relay output voltage 1

1. Turn the key to ON.

2. Check the voltage between the cooling fan relay connector and ground.

Multimeter positive lead		Multimeter negative lead	Voltage value (around)
Cooling fan relay.
Connector	Terminal number
ER07	Kl30	Vehicle body ground	12V battery voltage

Check if the result is normal.

Yes >> Go to step 8.

No >> Go to step 4.

4.Detect the fuse

1. Turn the key to "LOCK" or pull out.

2. Unplug the ESF11 fuse.

3. Check if the fuse is blown.

Check if the result is normal.

Yes >> Go to step 5.

No >> Replace the fuse.

5.Detection of M / C relay output voltage 2

1. Turn the key to ON.

2. Detect the voltage between the fuse connector and ground.

Multimeter positive lead

Multimeter negative lead

Voltage value

(around)

ESF11

Vehicle body ground

12V battery voltage

Check if the result is normal.

Yes >> Go to step 7.

No >> Go to step 6.

6.Detection of M / C relay output circuit

1. Turn the key to "LOCK" or pull out.

2. Remove M/C relay.

3. Detect the connectivity of the M / C relay connector and the wire between the fuse.

Multimeter positive lead		Multimeter negative lead	Connectivity
M/C relay
Connector	Terminal number
ER08	30	ESF11	Conduction

4. Check whether the ground is short or shorted to the power supply.

Check if the result is normal.

Yes >> Detects the M / C relay circuit.

No >> Repair or replace the problem parts.

7.Detect the cooling fan control module power supply circuit

1. Turn the key to "LOCK" or pull out.

2. Detect the continuity of the circuit between the cooling fan relay connector and the safety connector.

Multimeter positive lead		Multimeter negative lead	Connectivity
Cooling fan relay
Connector	Terminal number
EF07	30	ESF11	Conduction

3. Check whether the ground is short or shorted to the power supply.

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Repair or replace the problem parts.

8.Check the cooling fan relay to ground circuit

1. Turn the key to "LOCK" or pull out.

2. Detect the continuity of the circuit between the cooling fan relay connector and the ground.

Multimeter positive lead		Multimeter negative lead	Connectivity
Cooling fan relay
Connector	Terminal number
EF07	87	Vehicle body ground	Conduction

Check if the result is normal.

Yes >> Go to step 9.

No >> Repair or replace the fault parts.

9.Check the cooling fan relay

Refer to "Component detection (cooling fan relay)".

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Replace the cooling fan relay.

10.Check the cooling fan relay

Check the cooling fan relay Refer to "Component detection (cooling fan relay)".

Check if the result is normal.

Yes >> Go to step 11.

No >> Replace the faulty cooling fan motor.

11.Detect the cooling fan control signal circuit

1. Disconnect VCU connector.

2. Detect the continuity of the circuit between the cooling fan control module connector and the VCU connector.

Multimeter positive lead		Multimeter negative lead		Connectivity
Cooling fan control module		VCU
Connector	Terminal number	Connector	Terminal number	Conduction
F09	VC64	F21	VC64

3. Simultaneously detect whether the circuit is short to the ground or shorted to the power supply.

Check if the result is normal.

Yes >> Go to step 12.

No >> Repair or replace the fault parts.

12.Replace the cooling fan control module

1.Replace the cooling fan control module.

2.Finish the component function detection. Refer to "Electric vehicle control system - Component function detection"

Check if the result is normal.

Yes >> Detection is completed.

No >> Repair or replace the fault parts.

Component detection (cooling fan relay)

1.Detect the cooling fan relay

1. Turn the key to "LOCK" or pull out.

2. Disconnect the cooling fan control module connector.

3. Provide cooling fan control module connector terminal small battery voltage, as shown below, the detection of work

Cooling fan control module			Phenomenon
Motor Connector	Terminal
	Small battery positive	Small battery negative
F09	FA02	FA1G	Cooling fan operation

Check if the result is normal.

Yes >> Detection is completed.

No >> Replace the faulty cooling fan motor.

1.Check the cooling fan relay

1. Turn the key to "LOCK" or pull out.

2. Remove the cooling fan relay.

3. Detect the continuity of the circuit between the cooling fan relay connector under the following situation.

Terminal	Case	Connectivity
KL30	provide 12V DC supply voltage to pin 12 and pin 87	Conduction
87	No DC power supply available	No conduction

Check if the result is normal.

Yes >> Detection is completed.

No >> Replace the cooling fan relay.

M/C relay

Faults diagnosis flow

1.Check of M / C relay control circuit

1. Turn the key to "LOCK" or pull out.

2. Remove M/C relay.

3. Detect the M / C relay connector pin voltage

M/C relay connector			Voltage value (around)
Multimeter	Multimeter positive lead	Multimeter negative lead
	Terminal number
Connector number	2	3	0V

4.Turn the key to ON.

5. Detect the M / C relay connector pin voltage

M/C relay connector			Voltage value (around)
Multimeter	Multimeter positive lead	Multimeter negative lead
	Terminal number
Connector number	2	3	12V battery voltage

Check if the result is normal.

Yes >> Go to step 9

No >> Go to step 2

2.Detection of M / C relay power supply -1

Detects the voltage between the M / C relay connector pin and the vehicle body ground

Multimeter positive lead		Multimeter negative lead	Voltage value (around)
M/C relay
Connector	Terminal number
-	-	Vehicle body ground	12V battery voltage

Check if the result is normal.

Yes>> GO to step 6.

No >> Go to step 3

3.Detect the fuse

1.Remove EF13 fuse.

2.Check if the fuses are blown.

Check if the result is normal.

Yes >> Go to step 4

No >> Replace the fuse.

4.Detection of M / C relay power supply -2

Check the voltage between the fuse connector and the vehicle body

Multimeter positive lead

Multimeter negative lead

Voltage value

(around)

Fuse terminal

Vehicle body ground

12V battery voltage

Check if the result is normal.

Yes>> GO to step 5.

No >> Detects the low-voltage distribution controller output to the circuit between M / C.

5.Check of M / C relay power supply -1

1. Detect the harness connection between the M / C relay connector and the fuse

Multimeter positive lead	Multimeter negative lead		Connectivity
	M/C relay
	Connector	Terminal number
Fuse terminal	F22	2	Conduction

2. Check harness for continuity with power supply and ground.

Check if the result is normal.

Yes >> Go to "routine check".

No >> Repair or replace the fault part.

6.Check of M/C relay control signal circuit

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU harness connector.

3. Detect the connection between the M / C relay connector terminal and the VCU connector terminal.

Multimeter positive lead		Multimeter negative lead		Connectivity
M/C relay		VCU
Connector	Terminal number	Connector	Terminal number
F15	1	F22	34	Conduction

4. Also check whether the harness is shorted to power or ground.

Check if the result is normal.

Yes>> GO to step 7.

No >> Repair or replace the fault part.

7.Check VCU power supply circuit

Detect the voltage difference between the VCU connector and the vehicle body.

Multimeter positive lead		Multimeter negative lead	Connectivity
VCU
Connector	Terminal number
F21	1	Vehicle body ground	Conduction
F21	9
F21	47
F21	66

Check if the result is normal.

Yes>> GO to step 8.

No >> Repair or replace the fault part.

8.Fault simulation test

Refer to "Overview - Fault simulation test"

Check if the result is normal.

Yes >> Replace VCU.

No >> Repair or replace the fault part.

9.Detection of M / C relay power supply -3

Detects the voltage between the M / C relay connector pin and the vehicle body ground

Multimeter positive lead		Multimeter negative lead	Voltage value (around)
M/C relay
Connector	Terminal number
-	MC01	Ground	12V battery voltage

Check if the result is normal.

Yes>> GO to step 11.

No >> Go to step 10

10.Check of M / C relay power supply -2

1. Detect the harness connection between the M / C relay connector and the fuse

Multimeter positive lead	Multimeter negative lead		Connectivity
	M/C relay
	Connector	Terminal number
Fuse terminal	-	MC01	Conduction

2. Check harness for continuity with power supply and ground.

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Repair or replace the fault part.

11.Check M / C relay

Check if the result is normal.

Yes >> Detection is finished.

No >> Repair or replace the fault part.

Component detection (M / C relay)

Detection of M / C relay

1. Turn the key to "LOCK" or pull out.

2. Remove M/C relay.

3. Check the continuity of the pins of the M / C relay.

Interface	Condition	Connectivity
Interface 3 and 5	Pin 1 and 2 has direct current	Conduction
Interface 3 and 5	No direct current	No conduction

Check if the result is normal.

Yes >> Detection is finished.

No >> Replace the M/C relay.

Low voltage distribution controller

Diagnostic steps

1.Detect the fuse

1. Turn the key to "LOCK" or pull out.

1.Remove EF01 fuse.

2.Check if the fuses are blown.

Check if the result is normal.

Yes>> GO to step 2.

No >> Replace the fuse.

2.Detect the fuse

1. Turn the key to "LOCK" or pull out.

1.Remove EF01 fuse.

2.Check if the fuses are blown.

Check if the result is normal.

Yes >> Go to step 3.

No >> Replace the fuse.

3.Check low-voltage distribution controller power supply

Detect the voltage between the low-voltage distribution controller connector and ground;

Multimeter positive lead		Multimeter negative lead	Voltage value (around)
Low voltage distribution controller
Connector	Terminal number
F17	8	Vehicle body ground	12V battery voltage

Check if the result is normal.

Yes >> Go to step 4

No >> Go to step 6

4.Check low-voltage distribution controller control signal

Detect the voltage between the low-voltage distribution controller connector and ground;

Multimeter positive lead		Multimeter negative lead	Voltage value (around)
Low voltage distribution controller
Connector	Terminal number
F17	4	Vehicle body ground	12V battery voltage

Check if the result is normal.

Yes>> GO to step 5.

No >> Go to step 7

5.Check the output of the low voltage distribution controller

Detect the voltage between the low-voltage distribution controller connector and ground;

Multimeter positive lead		Multimeter negative lead	Voltage value (around)
Low voltage distribution controller
Connector	Terminal number
F17	10	Vehicle body ground	12V battery voltage

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Replace the faulty parts.

6.Check low-voltage distribution controller power supply circuit

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU harness connector.

3. Check the connection between the low-voltage distribution controller connector terminal and the 12V battery.

Multimeter positive lead		Multimeter negative lead	Connectivity
Low voltage distribution controller		12V battery
Connector	Terminal number	Positive port
F17	8		Conduction

4. Also check whether the harness is shorted to power or ground.

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Repair or replace the fault part.

7.Check low-voltage distribution controller control signal circuit

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU harness connector.

3. Check the connection between the low-voltage distribution controller connector terminal and the 12V battery.

Multimeter positive lead		Multimeter negative lead		Connectivity
Low voltage distribution controller		VCU
Connector	Terminal number	Connector	Terminal number
F17	10	F21	10	Conduction

4. Also check whether the harness is shorted to power or ground.

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Repair or replace the fault part.

A/C relay

Diagnostic steps

1.Check A / C relay control circuit

1. Turn the key to "LOCK" or pull out.

2. Remove A/C relay.

3. Detect the A / C relay connector pin voltage

A/C relay connector			Voltage value (around)
Connector	Multimeter positive lead	Multimeter negative lead
	Terminal number
ER09	KL30	87	0V

4.Turn the key to ON.

5. Detect the A / C relay connector pin voltage

A/C relay connector			Voltage value (around)
Multimeter	Multimeter positive lead	Multimeter negative lead
	Terminal number
ER09	KL30	87	12V battery voltage

Check if the result is normal.

Yes >> Go to step 8

No >> Go to step 2

2.Check A/C relay power supply -1

Detect the voltage between the A / C relay connector pin and the vehicle body ground

Multimeter positive lead		Multimeter negative lead	Voltage value (around)
A/C relay
Connector	Terminal number
ER09	KL30	Vehicle body ground	12V battery voltage

Check if the result is normal.

Yes>> GO to step 5.

No >> Go to step 3

3.Detect the fuse

1.Remove EF05 fuse.

2.Check if the fuses are blown.

Check if the result is normal.

Yes >> Go to step 4

No >> Replace the fuse.

4.Check A/C relay power supply -2

Check the voltage between the fuse connector and the vehicle body

Multimeter positive lead

Multimeter negative lead

Voltage value

(around)

Fuse terminal

Vehicle body ground

12V battery voltage

Check if the result is normal.

Yes>> GO to step 5.

No >> Detect the low-voltage distribution controller output to the circuit between A / C.

5.Check A / C relay power supply loop -1

1. Detect the harness connection between the A / C relay connector and the fuse

Multimeter positive lead	Multimeter negative lead		Connectivity
	A/C relay
	Connector	Terminal number
Fuse terminal	ER09	KL30	Conduction

2. Check harness for continuity with power supply and ground.

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Repair or replace the fault part.

6.Check A / C relay control signal circuit

1. Turn the key to "LOCK" or pull out.

2. Disconnect VCU harness connector.

3. Detect the connection between the A / C relay connector terminal and the VCU connector terminal.

Multimeter positive lead		Multimeter negative lead		Connectivity
A/C relay		VCU
Connector	Terminal number	Connector	Terminal number
ER09	85	F22	VC101	Conduction

4. Also check whether the harness is shorted to power or ground.

Check if the result is normal.

Yes>> GO to step 7.

No >> Repair or replace the fault part.

7.Check VCU power supply circuit

Detect the voltage difference between the VCU connector and the vehicle body.

Multimeter positive lead		Multimeter negative lead	Connectivity
VCU
Connector	Terminal number
F15	VC10	Vehicle body ground	Conduction
F15	VC29
F15	VC48
F15	VC67

Check if the result is normal.

Yes>> GO to step 8.

No >> Repair or replace the fault part.

8.Fault simulation test

Refer to "Overview - Fault simulation test"

Check if the result is normal.

Yes >> Replace VCU.

No >> Repair or replace the fault part.

9.Check A/C relay power supply -3

Detect the voltage between the A / C relay connector pin and the vehicle body ground

Multimeter positive lead		Multimeter negative lead	Voltage value (around)
A/C relay
Connector	Terminal number
ER09	85	Vehicle body ground	12V battery voltage

Check if the result is normal.

Yes>> GO to step 11.

No >> Go to step 10

10.Check A / C relay power supply loop -2

1. Detect the harness connection between the A / C relay connector and the fuse

Multimeter positive lead	Multimeter negative lead		Connectivity
	A/C relay
	Connector	Terminal number
Fuse terminal	ER09	85	Conduction

2. Check harness for continuity with power supply and ground.

Check if the result is normal.

Yes >> Refer to "Overview - Fault simulation test".

No >> Repair or replace the fault part.

11.Check A / C relay

Check if the result is normal.

Yes >> Detection is finished.

No >> Repair or replace the fault part.

Component detection (A / C relay)

Detection of A / C relay

1. Turn the key to "LOCK" or pull out.

2. Remove A/C relay.

3. Check the continuity of the pins of the A / C relay.

Interface	Condition	Connectivity
KL30 and 87 ports	Pin 85 and 86 has direct current	Conduction
KL30 and 87 ports	Pin 85 and 86 has no direct current	No conduction

Check if the result is normal.

Yes >> Detection is finished.

No >> Replace the A/C relay.

Timing charge switch

Faults diagnosis flow

1.Check the function of the timer charging switch backlight

1. Turn the key to "LOCK" or pull out.

2. Open the combination switch backlight switch.

3.Check the function of the timer charging switch backlight.

Check if the result is normal.

Yes >> Refer to step 6.

No >> Refer to step 2.

2. Check the power supply of the timer charging switch backlight

Check the voltage between the timing charge switch and the ground.

Multimeter positive lead		Multimeter negative lead	Voltage value
Timing charge switch
Connector	Terminal number
M11	3	Ground	12V battery voltage

Check if the result is normal.

Yes >> Refer to step 5.

No >> Refer to step 3.

3.Check the fuse

1. Turn the key to "LOCK" or pull out.

2. Close the combination switch backlight switch.

3. Unplug # IF02 fuse.

4. Check whether the fuse is blown.

Check if the result is normal.

Yes >> Refer to step 4.

No >> Replace the original circuit after the fuse is repaired.

4. Check the power supply circuit of the timer charging switch backlight

1.Disconnecttiming charge switch connector.

2. Check the connection between the timer charging switch connector and the safety connector.

Multimeter positive lead		Multimeter negative lead	Connectivity
Timing charge switch
Connector	Terminal number
M11	3	# IF02 fuse port	Conduction

Check if the result is normal.

Yes >> Check the battery power supply circuit.

No >> Repair or replace the fault part.

5. Check the power supply circuit of the timer charging switch

1. Turn the key to "LOCK" or pull out.

2. Close the combination switch backlight switch.

3. Disconnect timing charge switch connector.

4. Check the connection between the timer charging switch connector and ground.

Multimeter positive lead		Multimeter negative lead	Connectivity
Timing charge switch
Connector	Terminal number
M11	1	Ground	Conduction

Check if the result is normal.

Yes >> Replace the timer charge switch.

No >> Repair or replace the fault part.

6. Check the ground circuit of the timer charging switch

1. Turn the key to "LOCK" or pull out.

2. Close the combination switch backlight switch.

3. Disconnect timing charge switch connector.

4. Check the connection between the timer charging switch connector and ground.

Multimeter positive lead		Multimeter negative lead	Connectivity
Timing charge switch
Connector	Terminal number
M11	4	Ground	Conduction

Check if the result is normal.

Yes >> Refer to step 9.

No >> Refer to step 7.

7. Check the fuse

1. Unplug # IF02 fuse.

2. Check whether the fuse is blown.

Check if the result is normal.

Yes >> Refer to step 8.

No >> Replace the fuse.

8. Check the power supply circuit of the timer charging switch

Check the connection between the timer charging switch connector and the safety connector.

Multimeter positive lead		Multimeter negative lead	Connectivity
Timing charge switch
Connector	Terminal number
M11	3	# IF02 fuse port	Conduction

Check if the result is normal.

Yes >> Check the battery power supply circuit.

No >> Repair or replace the fault part.

9. Check the signal circuit of the timer charging switch

1. Disconnect VCU connector.

2. Check the connection between the timer charging switch connector and VCU.

Multimeter positive lead		Multimeter negative lead		Connectivity
Timing charge switch		VCU
Connector	Terminal number	Connector	Terminal number
M11	2	F23	22	Conduction

3. Also check the ground and the short circuit to the power supply situation.

Check if the result is normal.

Yes >> Refer to step 10.

No >> Repair or replace the fault part.

10. Check the timer charging switch

Actuator check. Refer to the following EVC-parts check (timing charge switch)

Check if the result is normal.

Yes >> checking is finished.

No >> Replace the timer charge switch.

Parts detection (timing charge switch)

1. Check the timer charging switch

1. Turn the key to "LOCK" or pull out.

2. Disconnect timing charge switch connector.

3. Check the connection between the timing charge switch connector under the following conditions.

Terminal number	Condition		Connectivity
1 and 2	Timing charge switch	Plug in	No conduction
		Loose	Conduction

Check if the result is normal.

Yes >> checking is finished.

No >> Replace the timer charge switch.

Symptom diagnosis

Electric Vehicle Control System

Symptom Checklist

Note:

Before using the symptom checklist, use the diagnostic service tool to self-test the VCU. If a DTC is detected, perform the appropriate diagnostic procedure.

symptom		Possible reasons
Can not enter the vehicle ready state, "Ready" light is not lit.		Key "start" signal is abnormal
		Gear is not at "N" position
		Charging harness connection
		Power battery power is too low
Can not drive	The motor can not output power normally	Gear is not at "N" position
		Accelerator pedal is not pressed
		Brake pedal is pressed
		ABS abnormal
		Motor self - limiting power
		Dischargeable battery power reduction
	Motor can output power (you can view the electric instrument "power meter")	Handbrake up
		Brake pedal is pressed
Energy consumption is too large	Driving resistance is too large	Tire air pressure too low
		The tire size is not correct
		Handbrake is not fully released
	AC energy consumption is too large	The set temperature is too high
	AC energy consumption is too large	The set temperature is too low
	Annex energy consumption is too large	The customer installs additional electronic equipment
No power down		Low voltage distribution controller bonding
		With charge wake-up signal
		With remote wake-up signal
The brake energy recovery function is turned off	——	The vehicle speed is too high or too low
	——	The accelerator pedal is depressed
	——	Braking process
	——	The VCU has received information about the ABS's turning off braking energy recovery function.
	VCU detects the relevant battery information	The chargeable power is too low
		Power battery single cell voltage is too high
		Power battery cell temperature is too high or too low
		Power battery temperature sensor failure
		Power battery total voltage is too high
		Power battery SOC is too high
AC charging failure	——	Key is at ON gear.
	——	Timer charging has been set
	——	DC charging plug is inserted
	——	Car Charger fault
	Battery status is not suitable for charging	Power battery temperature is too high or too low
		Power battery is full
		Power battery available capacity is low
Power battery is not full	——	Power battery temperature is too high or too low
Power battery is not full	——	Energy consumption during the charging process is too large
Remote charging function is disabled Timer charging function is disabled	——	Key is at ON gear.
	——	VCU not receive the T-BOX wake-up signal
	——	The vehicle is outside the communication service area
	——	Phone and remote server communication failure
	——	DC charging harness connected to DC charging pile
	Battery status is not suitable for charging	Power battery temperature is too high or too low
	Battery status is not suitable for charging	Power battery is full
DC/ AC charging failure	——	Key is at ON gear.
	——	Both DC and AC charging cables are plugged in
	Battery status is not suitable for charging	Power battery temperature is too high or too low
	Battery status is not suitable for charging	Power battery is full
Remote air conditioning function is disabled	——	The vehicle is outside the communication service area
	——	Phone and remote server communication failure
	——	Key is at ON gear.
	——	Power battery power is too low
	——	A/C System failure

Disassembly and installation

General precautions

1. Before replacing the vehicle controller, record the SOC, SOE, SOH and long-distance charging times which are displayed on the diagnostic service tool. After VCU replacement, use the diagnostic service tool to set the SOC, SOE, SOH and long-distance charging times according to the recorded data. After successful setup, power off and then power on to ensure that settings and storage are successful.

2. After replacing VCU, use the diagnostic service tool to clear the storage mileage variable, to ensure that the normal correction after SOH.

3. Before replacing the instrument, record the instrument display mileage, instrument replacement, and then use the diagnostic service tool in accordance with the data just recorded, set the vehicle mileage.

4. If the battery module is replaced, SOH is calculated on the basis of a stroke of 750 km per hour and a 0.1% SOH drop, and SOH is set by the diagnostic service tool.

5. If there is a serious failure maintained in 4S shop, the stored fault code needs to be cleared with diagnostic service tools, then the vehicle can run. Please check the following list for faults of LBC and VCU that need to be cleared.

LBC faults that need to be cleared

Serial No.	Faults code	Fault description
1	163	Critical fault of single cell under-voltage
2	178	Critical insulation malfunction
3	120	Primary malfunction of Thermal Instability
4	121	Secondary Malfunction of Thermal Instability