Safety Precaution
Introduction
Please abide by the following precaution measures, to ensure carrying out maintenance service safely and correctly.
Precaution for engineer using medical electronics
● The vehicle has strong magnetic parts.
● If an engineer uses medical electronic device, such as electronic pacemaker, it is forbidden for him to operate on the vehicle. Otherwise, the function of the electronic device may be affected by the strong magnetic parts.
● If an engineer uses medical electronic devices including heart pacemaker, cardioverter, defibrillator, the device can be only be used after its function being checked and confirmed before starting normal operations.
● During normal charge operation, the medical electronic device may be affected by electromagnetic wave. An engineer who uses medical electronic devices including heart pacemaker, cardioverter, defibrillator cannot enter passenger compartment (including trunk).
Precaution for communication device operation
● If an engineer uses medical electronic devices including heart pacemaker, cardioverter, defibrillator, please keep enough distance with communication device.
● The function of medical electronic devices including heart pacemaker, cardioverter, defibrillator may be affected by the electromagnetic wave of remote intelligent terminal.
● If an engineer uses medical electronic devices including heart pacemaker, cardioverter, defibrillator, the electromagnetic wave of remote intelligent terminal may affect its function. It is mandatory to request the medical electronic device manufacturer to check and confirm the possible effect on medical electronic device when using remote intelligent terminal.
High-voltage preventive measure
● The electric vehicle has a high-voltage battery. If the operation on the vehicle and high-voltage parts is incorrect, there are risks of leakage of electricity, electric shock, or similar accidents. Thus, it is mandatory to follow correct procedures to check and maintain.
● Before disconnect repair switch, please put the key on “LOCK” position or unplug the key.
● Disconnect repair switch before checking or maintaining high-voltage system. It is forbidden to close repair switch during the process of checking and maintenance. Before starting the operation on high-voltage system, be sure to wear insulated protection equipment, including gloves, shoes, and glasses.
● When a technician is operating high-voltage system, please ensure no one touching the vehicle. When there is no maintenance operation, please take insulated protection on the high-voltage sections to prevent anyone touching.
● When repair switch disconnects, it is forbidden that the key is at “ON” position or switched to “START” position.
High-voltage cable and safety sign
The color of high-voltage cable is orange and there are safety signs on the power battery assembly and other high-voltage parts. Do not touch these cables and parts.
Handling of high-voltage cable terminal
When the connector of high-voltage cable is plugged out, please use insulated adhesive tape to bind up immediately.
Regulation for a person wearing medical electronic device
The vehicle has strong magnetic parts. If an engineer uses medical electronic device, such as electronic pacemaker, its function may be affected by strong magnetic parts. Thus, these people cannot carry out repair work.
Forbidden accompanying article during work
The vehicle has strong magnetic parts. Thus, during work it is forbidden to take metal articles which may cause short circuit or magnetic articles such us various bank cards which may be damaged.
Place “Repairing High-voltage Parts, No Touch!” warning sign
Before repairing high-voltage parts, please place “Repairing High-voltage Parts, No Touch” warning sign on the prominent position of the repaired vehicle to remind other people.
If the part has high-voltage sign, please paste a new sign in the same position and direction when replacing high-voltage part or the sign is damaged.
Precaution for supplemental restraint system "airbag" and "safety belt pretension"
Supplemental restraint system “airbag” and “safety belt pretension” is used together with front seat safety belts, which can reduce the damage to the driver and front passenger during collision. Supplemental restraint system consists of safety belt, driver airbag, and front passenger airbag. The detailed information of supplemental restraint system is included in the chapters of airbag system and seat safety belt.
In order to avoid accidents, please abide by the following content:
● To avoid the failure of supplemental restraint system and considering that the risk of physical injuries will increase during collision if the system fails, all the service must be executed by JAC authorized dealer.
● Non-normative maintenance of supplemental restraint system including non-normative removal and installation may result in accidental trigger of the system and cause physical injuries. Regarding the method of removing airbag module, please refer to Airbag System chapter.
● Except for the operations in the service manual, please do not use electrical test device to test any circuit of supplemental restraint system. The color of harness and connector of supplemental restraint system is yellow or orange.
Precaution for using power tool (pneumatic or electric) and hammer
● When power switch is at “ON” position and approach airbag diagnosis sensor or other sensors of airbag system, please do not use power tools or hammer on the sensor part area. Violent vibration may trigger these sensors and airbag to cause serious injuries.
● When using power tools or hammer, put the key at “LOCK” position, unplug the negative pole of 12V lead-acid battery, wait at least one minute, and then start maintenance.
Precaution for removing 12V battery
Before removing 12V battery, turn the key to “ON” position, and then turn to “LOCK” position.
● Though the key is at “LOCK” position, auto-recharge function of 12V battery may activate.
● After the key turns from “ON” to “LOCK”, auto-recharge function of 12V battery will not activate.
Precaution for malfunction diagnosis
Attention
● Do not impose 7V or higher voltage on the measuring terminal.
● When using measuring device, the voltage of its terminal should be 7V or lower.
● Before checking circuit, be sure to turn the key to “LOCK” position, and disconnect the negative pole of 12V battery.
Precaution for harness maintenance
● Weld the damaged section, and use tape to bind.
Reminder
● The worn length of twisted-pair cable should be less than 110mm.
● Do not circle the damaged part to connect a sub-line.
Reminder
● Circling the damaged part to connect may result in the communication malfunction of CAN.
● If shield line of CAN communication line has malfunction, please replace the harness.
Preparation work
Common maintenance tool
Basic Principle of Controller Area Network CAN
CAN communication system
CAN communication system description
CAN (Controller Area Network) is real-time serial communication channel, and vehicle multiple-line communication channel with high communication efficiency and high fault-tolerant ability. A vehicle has many controllers which share information mutually. Each controller consists of two communication lines (CAN-H line and CAN-L line). Each controller can send or receive data, but only receive the needed data selectively.
CAN communication diagnosis
CAN communication diagnosis description
System schematic diagram
|
Name |
Harness |
Description |
|
CAN diagnosis CAN |
CAN-H CAN-L |
Communicate with diagnosis device. (CAN-H and CAN-L are used for control and diagnosis.) |
Description
CAN diagnosis is a method of using CAN communication line which connects diagnosis tool and controller to diagnose.
CAN malfunction diagnosis CAN
|
Formation |
Description |
|
Main line |
A communication line connecting points |
|
Sub-line |
A communication line connecting point and controller |
|
Connection point |
A point between sub-line and main line |
|
Terminal return circuit |
Return circuit (resistance) throughout CAN communication system |
Malfunction of CAN communication system CAN
● CAN line open circuit (CAN-H, CAN-L, or two lines disconnect at the same time)
● CAN line short circuit (short circuit to ground, two communication lines short circuit, or short circuit with other harness)
● Malfunction of connection point’s control circuit connecting with CAN communication line.
Phenomenon when CAN communication system has malfunction CAN
In CAN communication system, many controllers send and receive signals mutually. When CAN communication line has malfunction, the connecting controller cannot send or receive signals. In such circumstance, the controller will have malfunction or enters failure safety mode.
Malfunction example
Reminder
● In different malfunctions of CAN communication lines, the failure modes of vehicle’s controller will be different.
Example: Main line between VCU and AC opens circuit.
|
Controller name |
Main phenomenon |
|
OBC |
Unable to charge. |
|
Press down A/C switch, A/C does not work. |
|
|
● Unable to show energy flow. ● Unable to show gear position. ● Unable to show in interior temperature. |
|
|
● Power battery coulombmeter, thermometer, health meter does not show. ● System malfunction lamp is ON. ● READY lamp is not working. |
|
|
The functions of remote air conditioner, remote charging, remote inquiry fail. |
Example: T-BOX sub-line opens circuit
|
Main phenomenon |
|
|
OBC |
Remote charging fails. |
|
EC |
Press down A/C switch, A/C does not work. |
|
No abnormal phenomenon. |
|
|
System malfunction lamp is ON. |
|
|
T-BOX |
The functions of remote air conditioner, remote charging, remote inquiry fail. |
The following malfunctions cannot be diagnosed by CAN communication diagnosis method. Please diagnose the following malfunctions according to malfunction phenomenon.
|
Malfunction |
Malfunction phenomenon |
|
No abnormal phenomenon. |
|
|
Controllers connecting with CAN communication system enter failure safety mode or fail. |
Example: OBD sub-line opens circuit.
|
Controller name |
Main phenomenon |
|
No abnormal phenomenon. |
|
|
EC |
|
|
MP5 |
|
|
T-BOX |
Reminder
When OBD sub-line opens circuit, the sending and receiving of CAN communication signals will not be affected. Thus, there is no abnormal phenomenon, but please repair the circuit.
Example: CAN-H, CAN-L line short circuit.
|
Controller name |
Main phenomenon |
|
OBC |
Unable to charge. |
|
EC |
Press down A/C switch, A/C does not work. |
|
MP5 |
● Unable to show energy flow. ● Unable to show gear position. ● Unable to show in interior temperature. |
|
ICM |
● Power battery coulombmeter, thermometer, health meter does not show. ● System malfunction lamp is ON. ● READY lamp is not working. |
|
T-BOX |
The functions of remote air conditioner, remote charging, remote inquiry fail. |
CAN diagnosis of using diagnosis service tool
Rear the basic reason in light of following information when using diagnosis service tool for CAN diagnosis.
● System response
● Controller diagnosis information
● Self-diagnosis
Self-diagnosis
When communication signal cannot be sent or received through CAN communication line, the relevant DTC of CAN communication will be shown on the screen of diagnosis service tool.
Reminder
The following chart describes CAN related DTC.
|
DTC |
Self-diagnosis item (shown on diagnosis service tool)
|
DTC judgment condition |
Check |
|
P300C |
Battery controller message lost |
When VCU cannot receive battery controller CAN signal for 5 seconds or more. |
Check battery controller |
|
Battery controller message lost |
|||
|
P300E |
Battery controller message lost |
||
|
P300F |
Electric motor controller message lost |
When VCU cannot receive electric motor controller CAN signal for 5 seconds or more. |
Check electric motor controller |
How to use CAN communication signal chart
CAN communication signal chart shows the sent and received signals between controllers. This chart is very useful to find the basic reason of malfunction phenomenon related with signal, which can be checked through sent unit and received unit.
System Introduction
Components
|
1.Battery management system |
2. TBOX (remote intelligent terminal)TBOX |
|
3.Whole vehicle controller |
4.MP5 |
|
5.Diagnosis terminal |
6.Electronic instrument |
|
7. ABS controller |
8.On-board charger |
|
9.Electric motor controller |
10.Compressor controller |
|
11. Vacuum pump controller |
12.Air conditioner panel controller |
|
13. EPS controller |
14. BCM |
Controller Area Network CAN
CAN communication system description CAN
CAN communication system chart CAN
Introduction
● CAN (Controller Area Network) is real-time serial communication channel, and vehicle multiple-line communication channel with high communication efficiency and high fault-tolerant ability. A vehicle has many controllers which share information mutually. Each controller consists of two communication lines (CAN-H line and CAN-L line). Each controller can send or receive data, but only receive the needed data selectively.
● This vehicle has two controller area networks. One is whole vehicle CAN, and the other is internal CAN.
CAN communication signal overview CAN
● CAN communication system consists of two terminal resistances to form a return circuit. When sending CAN signal, the current moves to CAN-H line through controller sending terminal, then moves to CAN-L line through terminal resistance, and then return to controller receiving terminal.
● The current moves respectively through CAN-H and CAN-L, and produces voltage decrease when going through terminal resistance, and forms electric potential difference between CAN-H and CAN-L.
● signal with no current going through is called “recessiveness”, and A signal with current going through is called “dominance”.
The system generates digital signal through the produced electric potential difference.
Composition of CAN communication signal (message)
|
SN |
Section name |
Description |
|
1 |
Start-of-frame (1 bit) |
The start of frame transmission. |
|
2 |
Arbitration field (11 bit) |
Determine the priority of message. |
|
3 |
Control field (6 bit) |
Represent the quantity of signals. |
|
4 |
Data field (0-64 bit) |
Show data. |
|
5 |
CRC verification field (16 bit) |
Used for CRC verification, to ensure signal being sent and received normally. |
|
6 |
ACK response field (2 bit) |
Receive completed field, and send to signal sending unit |
|
7 |
End-of-frame (7 bit) |
The end of frame transmission. |
CAN communication harness CAN
CAN communication harness is a twisted pair consisting of CAN-H (1) and CAN-L (2), and has excellent anti-interference capability.
Reminder
As the differential voltage between CAN-H and CAN-L when the system goes through is transferred into digital signal and the two lines are designed into twisted-pair structure, CAN communication system has anti-interference capability.
As CAN-H line and CAN-L line are twisted together, when interference (1) happens, voltage change occurs and at the same time voltage difference (2) also results in the same voltage change. Thus, the lines receive interference at the same time, to ensure differential voltage does not change.
CAN communication signal
Each controller in CAN communication system sends signal through CAN communication control circuit, and receive the needed signal from other controller.
● Example: Signal sending
● Example: signal receiving
Reminder
The above signal names and signal communication are only for reference. For CAN communication signals of this vehicle, please refer to CAN Communication Signal Chart.
CAN communication control circuit CAN
CAN communication control circuit is integrated into the controller and used for receiving and sending CAN communication signals.
|
Composition |
Description |
|
CAN controller CAN |
Control the sending and receiving of CAN communication signals and monitor malfunctions. |
|
Transceiver |
Conduct the transfer between digital signal and CAN communication signal. |
|
Filter circuit |
Eliminate the noise of CAN communication signal. |
|
Terminal circuit (include terminal resistance 120Ω) |
Generate electric potential difference between CAN-H and CAN-L. |
*：Terminal circuit is only in the control points of two terminals of harness.
CAN communication system specification sheet
Describe the composition of CAN communication system points.
Reminder
Use CAN communication system specification sheet by referring to “Malfunction diagnosis procedure.”
|
Whole Vehicle CAN System |
|
|
VCU |
×（选中是打钩还是打叉？）√ |
|
PCU |
× |
|
LBC |
× |
|
OBC |
× |
|
ICM |
× |
|
T-BOX |
× |
|
AC |
× |
|
EC |
× |
|
ABS |
× |
|
MP5 |
× |
|
EPS |
× |
|
BCM |
× |
|
VPC |
× |
CAN communication signal chart CAN
Use this chart by referring to “How to use CAN communication signal chart”.
Reminder
Refer to “English abbreviation illustration chart”.。
T: Sent R: Received
|
Signal Name |
Whole Vehicle CAN System |
||||||||||||
|
T-BOX |
PCU |
LBC |
OBC |
ICM |
AC |
EC |
BCM |
VPC |
EPS |
ABS |
MP5 |
VCU |
|
|
预充继电器使能信号 |
|
|
R |
|
|
|
|
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|
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|
T |
|
|
|
R |
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T |
|
|
Main negative pole relay active signal |
|
|
R |
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T |
|
Charging wake-up signal |
|
|
R |
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T |
|
Power battery quantity of electricity signal |
|
|
T |
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R |
|
R |
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R |
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T |
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T |
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R |
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R |
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R |
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T |
|
|
Power battery set current voltage signal |
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|
T |
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R |
|
R |
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|
R |
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T |
|
|
Battery full status signal |
|
|
T |
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|
R |
|
Battery work mode signal |
|
|
T |
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|
R |
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Stop charging signal |
|
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|
R |
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T |
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Charging current order signal |
|
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|
R |
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T |
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Charging status signal |
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T |
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R |
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T |
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R |
|
|
High voltage terminal output voltage value signal |
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T |
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R |
|
Charger working temperature signal |
|
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|
T |
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|
R |
|
Electric motor rotation speed order signal |
|
R |
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T |
|
Electric motor target torque signal |
|
R |
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|
T |
|
Electric motor temperature signal |
|
R |
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|
T |
|
Electric motor controller temperature signal |
|
R |
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T |
|
TM electric motor current status signal TM |
|
T |
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|
R |
|
Electric motor actual rotation speed signal |
|
T |
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|
R |
|
Reply electric motor rear torque signal |
|
T |
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|
R |
|
Click rotation speed signal |
|
T |
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R |
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|
S signal |
|
|
R |
|
R |
|
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|
R |
T |
|
Electric motor malfunction indication lamp signal |
|
|
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|
R |
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|
T |
|
High-voltage malfunction indication lamp signal |
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|
R |
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T |
|
12V battery charging indication lamp signal |
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|
R |
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T |
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System malfunction indication lamp signal |
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R |
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T |
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Tortoise lamp signal |
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R |
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T |
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READY lamp signal READY |
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R |
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T |
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Charging status indication lamp signal |
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R |
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T |
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Power battery OFF lamp signal |
|
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R |
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T |
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Key position signal |
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R |
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T |
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Gear position signal |
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R |
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T |
|
Diagnosis malfunction code signal |
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R |
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T |
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Buzz signal |
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R |
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T |
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Energy flow status signal |
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R |
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T |
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Charging start signal |
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R |
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T |
|
Remaining mileage signal |
R |
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R |
T |
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Average energy consumption signal |
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R |
T |
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Instant energy consumption signal |
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R |
T |
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Air conditioner ON energy consumption signal |
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R |
T |
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Energy recycle signal |
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R |
T |
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Charging mode signal |
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R |
T |
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Forbidden low temperature charging signal |
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R |
T |
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Air conditioner working signal |
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R |
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T |
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Target temperature set signal |
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R |
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T |
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Air conditioner blowing rate set signal |
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R |
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T |
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Air conditioner mode set signal |
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|
R |
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|
T |
|
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Remote air conditioner request temperature signal |
R |
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|
R |
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T |
|
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Power battery maintenance reminder signal Maintenance reminder signal |
R |
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|
T |
|
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Air filter maintenance reminder signal |
R |
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T |
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Other maintenance reminder signal |
R |
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T |
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Electronic principle chart
CAN system
System harness chart
Between front compartment control harness and front compartment harness
|
1 |
|
|
Plug between lines |
|
Line color |
Signal name |
|
|
G |
CANLd CAN High |
|
|
38 |
Y |
CANHd CAN High |
Between front compartment harness and dashboard main harness
|
Plug number |
2 |
|
Plug name |
Plug between lines |
|
Line color |
Signal name |
|
|
G |
CANLd CAN High |
|
|
2 |
Y |
CANHd CAN High |
Between front compartment harness and dashboard main harness
|
Plug number |
3 |
|
Plug name |
Plug between lines |
|
Terminal number |
Line color |
Signal name |
|
10 |
G |
CANLd CAN High |
|
11 |
Y |
CANHd CAN High |
ABS controller
|
Plug number |
F13 |
|
Plug name |
ABS controller |
|
Plug model |
1-1379208-2 |
|
Terminal number |
Line color |
Signal name |
|
1 |
R |
|
|
4 |
LB |
AB06 Front right wheel speed sensor ground |
|
8 |
LO |
AB08 Front left wheel speed sensor ground |
|
12 |
P |
ESP1 ESC switch |
|
13 |
B |
AB1G ABS electric motor electric source ground |
|
14 |
RY |
CANLd CAN low |
|
16 |
LG |
|
|
17 |
LB |
AB11 Rear right wheel speed sensor signal line |
|
18 |
GB |
AB02x Rear left wheel speed sensor ground |
|
19 |
LP |
AB09 Front left wheel speed sensor signal line |
|
25 |
R |
AB25 Valve relay electric source |
|
26 |
RW |
CANHd CAN high |
|
28 |
BY |
AB20x Controller electric source (IG1) |
|
29 |
Y |
AB12x Rear right wheel speed sensor ground |
|
30 |
BrB |
BR03 Brake lamp switch input |
|
31 |
BO |
AB03x Rear left wheel speed sensor signal line |
|
38 |
B |
AB2G Controller ground line |
LBC
|
Plug number |
F17 |
|
Plug name |
LBC |
|
Plug model |
RT061619PNHEC03 |
|
Terminal number |
Line color |
Signal name |
|
A |
Y |
|
|
B |
G |
CANLk CAN_L signal interaction |
|
C |
B |
CANGND CAN shield grounding |
|
D |
R |
BM04 High level effectiveness |
|
E |
R |
|
|
F |
W |
VC99 B+ relay control |
|
G |
R |
VC100 Precharge relay control |
|
H |
B |
BM17 Fan battery |
|
J |
B |
BM09 LBC battery |
|
M |
Y |
CANHa Internal CAN High |
|
N |
G |
CANLa Internal CAN low |
|
R |
G |
BX08 High-voltage interlocking signal 1 |
|
S |
WB |
VC39 High-voltage interlocking signal 2 |
|
U |
R |
BM11 LBC fan battery |
|
V |
WY |
BM04a LBC battery |
T-BOX
|
Plug number |
F20 |
|
Plug name |
Remote intelligent terminal |
|
Plug model |
776273-1 |
|
Terminal number |
Line color |
Signal name |
|
1 |
R |
SR01 T-BOX battery positive |
|
2 |
Y |
CANHs CAN_H signal interaction |
|
3 |
G |
CANLs CAN_L signal interaction |
|
10 |
B |
CZ10 T-BOX battery negative |
|
12 |
L |
ZB03 IG2 |
|
14 |
R |
CZ14 Remote awakening signal |
VCU plug 2VCU
|
Plug number |
F22 |
|
Plug name |
VCU plug 2 |
|
Plug model |
1473252-1 |
|
Terminal number |
Line color |
Signal name |
|
83 |
P |
VC83 Self-maintaining SSO control signal |
|
85 |
L |
VC85 Brake pedal sensor 2 ground |
|
86 |
Y |
VC86 Charging indication lamp 1 (yellow) |
|
91 |
R |
VC91 Fast-charging relay control signal |
|
92 |
GrO |
VC92 DCDC enabled |
|
96 |
R |
|
|
98 |
Y |
VC98 Brake pedal sensor 2 power supply |
|
99 |
W |
|
|
100 |
R |
VC100 Precharge relay control (12V) |
|
101 |
LR |
VC101 AC relay control (0V) |
|
104 |
R |
VC104 Acceleration pedal sensor 2 power supply |
|
106 |
G |
VC106 Charging indication lamp 2 (green) |
|
107 |
R |
VC107 General positive relay control (12V) |
|
109 |
B |
VC109 Cooling pump control signal |
|
112 |
RY |
VC112 Acceleration pedal sensor 1 power supply |
|
115 |
RW |
CANH-2 |
|
116 |
RY |
CANL-2 |
|
120 |
RW |
CAMHj |
|
121 |
RY |
CAMLj |
Electric motor controller
|
Plug number |
FC01 |
|
Plug name |
Electric motor controller |
|
Plug model |
770680-1 |
|
Terminal number |
Line color |
Signal name |
|
1 |
R |
PU01 Electric motor controller 12V battery positive PU01 |
|
2 |
R |
PU01a Electric motor controller 12V battery positive PU01a |
|
10 |
PW |
VC92 DCDC Possible VC92 |
|
11 |
GY |
PU11 DCDC Malfunction feedback PU11 |
|
16 |
B |
PU16 Electric motor controller 12V battery negative PU16 |
|
21 |
G |
CANL CAN_L Signal interaction CANL |
|
22 |
Y |
CANH CAN_H Signal interaction CANH |
|
23 |
B |
CANGND CAN Shielding ground CANGND |
Compressor controller
|
Plug number |
FC02 |
|
Plug name |
Compressor controller |
|
Plug model |
194180010 |
|
Terminal number |
Line color |
Signal name |
|
1 |
W |
CM06 Electromagnetic valve 1 Relay 12 Battery positive |
|
2 |
B |
CND 12V battery negative |
|
3 |
RW |
CANHg CAN_H Signal interaction |
|
4 |
RY |
CANLg CAN_L Signal interaction |
|
5 |
R |
AC02 compressor controller ON |
|
6 |
Y |
CM02 Electromagnetic valve 1 Relay 12 Battery positive |
|
Plug number |
FC05 |
|
Plug name |
On-board charger |
|
Plug model |
PB625-08027 |
|
Terminal number |
Line color |
Signal name |
|
1 |
L |
CC01 Charging connection status confirmation |
|
2 |
W |
CP01 Charging power confirmation |
|
3 |
BW |
KL30 Charger electric source |
|
4 |
L |
FT04a Charging status output |
|
5 |
RW |
|
|
6 |
RY |
CANLb CAN_L signal interaction |
|
7 |
W |
CH03 Output 12V wake-up signal |
|
8 |
B |
CS08 12V battery negative |
Air conditioner panel
|
Plug number |
M13 |
|
Plug name |
Air conditioner panel |
|
Plug model |
HS'G:172850-2 |
|
Terminal number |
Line color |
Signal name |
|
|
1 |
R |
AC02 IGN2 |
|
|
3 |
BrR |
TIO2f Backlight positive pole |
|
|
4 |
L |
TI03 Backlight negative pole |
|
|
5 |
RB |
ACB03 PTC open first line |
|
|
6 |
RW |
ACB04 PTC open second line |
|
|
7 |
RW |
CANHz CAN high |
|
|
8 |
RY |
CANLz CAN low |
|
|
10 |
B |
AC1G Whole vehicle power ground wire |
|
|
12 |
BW |
ACB14 Ventilating fan- |
|
|
13 |
Gr |
ACA17 Temperature motor positive |
|
|
14 |
BrO |
ACA15 Temperature motor negative |
|
|
15 |
L |
ACA04 Mode electric motor positive |
|
|
16 |
R |
ACA05 Mode electric motor negative |
|
|
17 |
LW |
ACA13 New air return motor+ |
|
|
18 |
BrR |
ACA14 New air return motor- |
|
|
19 |
GR |
ACB09 Evaporator temperature sensor+ |
|
|
20 |
Br |
ACA08 Sensor and electric motor reference ground |
|
|
21 |
L |
AC01a BATT+ |
|
|
25 |
BrV |
BB07 Rear defrost request |
|
|
26 |
WB |
DE02a Rear defrost feedback |
|
|
27 |
GB |
||
|
28 |
GR |
||
|
29 |
G |
ACB07 PTC temperature sensor+ |
|
|
30 |
YR |
ACB08 PTC temperature sensor- |
|
|
31 |
GrR |
ACB10 Outside temperature sensor+ |
|
|
32 |
Br |
ACA08e 5V reference voltage |
|
|
33 |
G |
ACA06 Temperature motor position |
|
|
34 |
P |
ACA16 Mode motor position |
|
|
35 |
Y |
ACA07 GND |
|
|
38 |
Y |
ACB11 Interior temperature sensor+ |
|
|
39 |
L |
ACB01a Blower start signal |
|
|
40 |
G |
ACB02 Air speed regulator (Stepless speed regulation) |
|
MP5C3 interface
|
Plug number |
M08 |
|
Plug name |
MP5C3 interface |
|
Plug model |
HG'S:2005071-2 |
|
Terminal number |
Line color |
Signal name |
|
1 |
RY |
|
|
2 |
RW |
AU17 Reverse video signal |
|
3 |
GrB |
BU02bx Reverse check signal |
|
4 |
L |
|
|
6 |
W |
MG02 Microphone control |
|
7 |
GL |
MG05 Vehicle speed signal |
|
9 |
RG |
AU14 Line control ground-2 (left) |
|
10 |
RW |
CANHp CAN high |
|
11 |
RY |
CANLp CAN low |
|
12 |
B |
MG01a Microphone electric source ground |
|
14 |
Shielding |
AUGND |
|
RW |
MG06 MIC input |
|
|
19 |
RY |
MG03 MIC signal ground |
|
20 |
Shielding |
MG07 MIC shielding ground |
Electrical instrument A interface
|
Plug number |
M26 |
|
Plug name |
Electrical instrument A interface |
|
Plug model |
HS'G:1719057-2（Blue） |
|
Terminal number |
Line color |
Signal name |
|
1 |
BO |
IL01 B+ |
|
3 |
BrV |
BB18a IG1 |
|
7 |
B |
IC3G GND |
|
8 |
B |
GND EP07 shielding ground |
|
10 |
BW |
VSP07 VSP/-PWM |
|
14 |
PB |
TI01i Backlight + |
|
15 |
L |
TI03e Backlight - |
|
17 |
LO |
HI02b High beam+ |
|
18 |
B |
IC3Ga High beam-- |
|
20 |
GO |
FG02a Front fog lamp+ |
|
21 |
LgY |
FG05b Rear fog lamp+ |
|
23 |
LB |
TU03e Turn left + |
|
24 |
L |
TU04e Turn right + |
|
27 |
L |
EP07 Vehicle speed output |
|
29 |
RY |
CANLm CANL |
|
31 |
RW |
CANLm CANH |
Electrical instrument B
|
Connector number |
M17 |
|
Connector name |
Combination instrument B interface |
|
Connector model |
HS'G:1719057-1（Green） |
|
Terminal number |
Line color |
Signal name |
|
1 |
BrL |
AI14x Main safety belt- - |
|
2 |
BrY |
AI15x Sub safety belt- - |
|
4 |
GrR |
AI16x SBR- |
|
5 |
OR |
AI17x SBR+ |
|
7 |
Gr |
DR02a Left front door open- |
|
8 |
WO |
DR03a Right front door open- |
|
8 |
W |
DR04x Left rear door open- 左 |
|
9 |
Gr |
DR05x Right rear door open- |
|
11 |
Br |
BR06x Brake liquid level |
|
12 |
BrW |
BR05 Hand bake- |
|
18 |
GY |
PU11 DC/DC failure |
|
20 |
YG |
AI03 Airbag failure |
|
21 |
GO |
LO03a Low beam |
|
24 |
Y |
EP06 EPS failure |
|
26 |
L |
IL03ax Trunk lamp- |
|
29 |
GrO |
BU03x Buzzer |
|
31 |
Lg |
TR03 TRIP switch |
EPS module signal
|
Connector number |
M06 |
|
Connector name |
EPS module signal |
|
Connector model |
1379659-3(AMP) |
|
Terminal number |
Line color |
Signal name |
|
3 |
L |
EP07 Speed signal |
|
5 |
WY |
EP02 Electrical source |
|
7 |
OG |
CL01s CAN low |
|
8 |
OV |
CH01s CAN high C |
Vacuum pump controller
|
Terminal number |
Line color |
Signal name |
|
3 |
L |
|
|
4 |
R |
|
|
5 |
R |
VP01 Electrical source, vacuum pump relay supply |
|
6 |
W |
VP04 Connect pressure switch |
|
7 |
B |
|
|
8 |
B |
VP02 Controller ground |
|
9 |
B |
|
|
10 |
RY |
CANL |
|
11 |
RW |
CANH |
|
12 |
B |
VP05 Connect vacuum pump motor ground |
|
13 |
Gr |
|
|
14 |
Gr |
VP06a Connect vacuum pump motor electrical source |
|
Connector number |
M08 |
|
Connector name |
Body control module C1 |
|
Connector model |
284972-1（Black） |
|
Terminal number |
Line color |
Signal name |
|
2 |
YR |
|
|
5 |
LG |
TU05 Left turn lamp switch |
|
7 |
RG |
ACC1 ACC electrical source |
|
8 |
BrV |
BB18 IG1 electrical source |
|
9 |
LR |
TU07 Warning lamp switch |
|
10 |
GW |
WP07 Rear wiper switch |
|
13 |
BY |
|
|
16 |
PB |
WP12 Front wiper low speed switch |
|
21 |
BO |
WP11 Front wiper intermediate switch |
|
22 |
G |
IL05 Key plug-in switch |
|
24 |
RB |
WP08 Front water-spray switch |
|
26 |
BW |
WP13 Front wiper connect switch |
|
27 |
BL |
IL06 Key hole lamp |
|
28 |
GW |
BA15 Electrical window relay |
|
29 |
BrO |
|
|
30 |
BL |
LO07 Low beam switch |
|
31 |
BV |
IL04 Small lamp switch |
|
33 |
GB |
FG09 Rear fog lamp switch |
|
34 |
LP |
TU06 Right turn lamp switch |
|
37 |
GB |
WP05 Rear water-spray switch |
|
38 |
BrV |
BB07 Rear defrost switch |
|
40 |
GW |
WP20 Rear wiper relay |
|
41 |
OGr |
CL01b CAN low |
|
42 |
OV |
CH01b CAN high |
|
45 |
RW |
WP09 Wipe intermediate adjustment signal |
|
47 |
LB |
TR02 Tail door unlock switch |
|
49 |
GY |
HI09 High beam switch |
|
50 |
BO |
FG08 Front fog lamp switch |
|
52 |
LR |
BB24 |
EPB controller (if equipped)
|
Terminal number |
Line color |
Signal name |
|
2 |
RL |
PB02 Autohold signal Autohold |
|
5 |
RW |
PB05 Autohold lamp signal |
|
8 |
LW |
PB08 Indicator lamp signal |
|
9 |
LO |
PB09 SW1 |
|
10 |
RY |
PB10 SW2 |
|
12 |
L |
|
|
13 |
WR |
PB13 Always power |
|
14 |
G |
PB14 Left electrical motor electrical source |
|
15 |
R |
PB15 Always power |
|
16 |
RW |
PB16 CANH |
|
17 |
RY |
PB17 CANL |
|
18 |
LO |
PB18 SW3 |
|
19 |
RY |
PB19 SW4 |
|
22 |
WO |
PB22 Control IGN electrical source |
|
27 |
W |
|
|
28 |
B |
PB28G Right electrical motor ground |
|
29 |
O |
|
|
30 |
B |
PB30G Left electrical motor ground |
Diagnosis interface
|
Plug number |
M28 |
|
Plug name |
Diagnosis interface |
|
Plug model |
HS'G: DJ7163-1.8-21 |
|
Line color |
Signal name |
|
|
2 |
RY |
|
|
4 |
YO |
AI02x Airbag diagnostics |
|
5 |
RY |
CANLx-2 Fast charging CAN low |
|
6 |
RY |
CANLv Whole vehicle CAN low |
|
8 |
R |
BR01a Brake signal |
|
9 |
RW |
|
|
10 |
RW |
CANHa High voltage battery internal CAN high |
|
12 |
B |
DI2G Ground |
|
13 |
B |
DI1G Ground |
|
14 |
RW |
Basic Check
Malfunction diagnosis procedure
Malfunction diagnosis procedure chart
Malfunction diagnosis procedure
Customer visit
Customer visit is very important for checking the fundamental reasons of CAN communications system malfunctions, and helps to know the status and symptom of the vehicle.
Key points during visit
● What: part name What
● When: date, frequency When
● Where: road condition, venue Where
● Condition: drive condition, environment
● Result: malfunction phenomenon
Reminder for checking defaulted part
● Please check the defaulted part and relevant non-defaulted part.
● When CAN communication system has malfunctions, many controllers may enter the “Failure-Safety” mode.
● Observe dashboard to find the fundamental reasons, as dashboard is very obvious for customers to see malfunctions.
● As very easily recognized, electrification dashboard plays an important role in checking the fundamental reasons. Most of the displayed signals are from CAN messages sent by vehicle parts. Please check as following:
Check the status of the vehicle.
Check whether the malfunction occurs again.
Reminder:
When the malfunction occurs again, please do not turn off the switch. Otherwise, the malfunction may recover automatically and it is difficult to find fundamental reason.
Create malfunction questionnaire
Fill out the following chart according to malfunction phenomenon described by customer, vehicle status, checking situation.
Confirm fundamental reason
Confirm the fundamental reason according to CAN diagnosis service tool malfunction solutions.
How to use this manual
How to use this chapter
Information
● This part describes the basic knowledge of CAN communication system, and malfunction diagnosis methods.
Malfunction diagnosis procedure, please refer to “Malfunction diagnosis procedure chart”.
List of abbreviations
Abbreviations of controller names in this chapter
|
Abbreviation |
Name |
|
AC |
Air conditioner panel controller |
|
OBC |
On-board charger |
|
EC |
Air conditioner compressor controller |
|
ICM |
Electric instrument |
|
LBC |
Battery controller |
|
OBD |
On-board diagnostics |
|
PCU |
Motor controller |
|
T-BOX |
Remote intelligent terminal |
|
VCU |
Vehicle controller |
|
MP5 |
Multimedia player |
|
ABS |
Anti-lock brake system |
|
BCM |
Body control module |
|
EPB（如装备）(If equiped) |
Electrical parking brake |
|
EPS |
Electronic power steering |
|
VPC |
Vacuum pump controller |
Malfunction diagnosis
Malfunction function table
Principle line
|
Reference |
|
|
Principle line circuit between VCU and ABS |
See below |
|
See below |
Branch line
|
Title |
Reference |
|
See below |
|
|
PCU branch line |
See below |
|
LBC branch line |
See below |
|
OBC branch line |
See below |
|
ICM branch line |
See below |
|
ABS branch line |
See below |
|
AC branch line |
See below |
|
EC branch line |
See below |
|
T-BOX branch line |
See below |
|
MP5 branch line |
See below |
Short circuit
|
Title |
Reference |
|
CAN circuit |
See below |
Principle line circuit between VCU and ABS
Diagnosis method
1. Check connector
1. Turn key to “LOCK” position or plug out.
2. Disconnect 12V battery negative pole wire.
3. Check whether wire connector 1 is damaged, bended, or loose (connector side and wire side).
Abnormal >> repair terminal or connector.
1. Disconnect connectors of following parts.
VCU
2. Check connectivity between VCU connector and wire connector.
|
Wire connector |
Connectivity |
|||
|
Terminal |
Connector |
Terminal |
||
|
121 |
F28 |
1 |
Breakover |
|
|
120 |
2 |
Breakover |
||
Abnormal >> repair principle wire between VCU and wire connector F28.
3. Check wire connectivity
1. Disconnect connectors of following parts.
ABS
Wire connector 1.
2. Check connectivity between ABS connector and wire connector.
|
ABS connector |
Wire connector |
Connectivity |
||
|
Connector |
Terminal |
Connector |
Terminal |
|
|
21 |
F29 |
33 |
Breakover |
|
|
23 |
38 |
Breakover |
||
Normal or abnormal?
Normal >> connect all connectors and diagnose again. Refer to “CAN Communication System-Malfunction diagnostics chart”.
Abnormal >> repair principle wire between ABS and wire connector F29.
Principle line circuit between AC and OBD
Diagnosis method
1. Check connector
1. Turn key to “LOCK” position or plug out.
2. Disconnect 12V battery negative pole wire.
3. Check whether wire connector 1 is damaged, bended, or loose (connector side and wire side).
Normal or abnormal?
Normal >> turn to 2.
Abnormal >> repair terminal or connector.
2. Check wire connectivity
1 Disconnect connectors of following parts.
AC
Wire connector M43
2. Check connectivity between AC connector and wire connector.
|
AC connector |
Wire connector |
Connectivity |
||
|
Connector |
Terminal |
Connector |
Terminal |
|
|
M26 |
31 |
M43 |
2 |
Breakover |
|
29 |
1 |
Breakover |
||
Normal or abnormal?
Normal >> turn to 3.
Abnormal >> repair principle wire between AC and wire connector M43.
3. Check wire connectivity
1. Disconnect connector of wire connector F28.
2. Check connectivity between OBD connector and wire connector.
|
OBD connector |
Wire connector |
Connectivity |
||
|
Connector |
Terminal |
Connector |
Terminal |
|
|
M28 |
14 |
F28 |
11 |
Breakover |
|
6 |
10 |
Breakover |
||
Normal or abnormal?
Normal >> connect all connectors and diagnose again. Refer to “CAN Communication System-Malfunction diagnostics chart”.
Abnormal >> repair principle wire between OBD and wire connector F28.
VCU branch line
Diagnosis method
1. Turn key to “LOCK” position or plug out.
2. Disconnect 12V battery negative pole wire.
3. Check whether VCU terminal and connector is damaged, bended, or loose (connector side and wire side).
Abnormal >> repair terminal or connector.
2. Check whether wire circuit opens
1. Disconnect VCU connector.
2. Check VCU wire connector terminal resistance value.
|
VCU wire connector V |
Resistance value（Ω） |
||
|
Connector No. |
Terminal No. |
||
|
F22 |
121 |
120 |
54 ～ 66 |
Abnormal >> repair VCU branch line.
3. Check electricity supply and ground circuit
Check VCU electricity supply and ground circuit. Refer to “Electric Control System-diagnosis method”.
Normal (current malfunction) >> replace VCU. Refer to “Electric Control System-removal and installation”.
Normal (past malfunction)>> Malfunction is detected in VCU branch line.
Abnormal >> repair electricity supply and ground circuit.
PCU branch line PCU
Diagnosis method
1. Check connector
1. Turn key to “LOCK” position or plug out.
2. Disconnect 12V battery negative pole wire.
3. Check whether PCU terminal and connector is damaged, bended, or loose (connector side and wire side).
Normal or abnormal?
Normal >> turn to 2.
Abnormal >> repair terminal or connector.
2. Check whether wire circuit opens
1. Disconnect PCU connector.。
2. Check PCU wire connector terminal resistance value.
|
PCU wire connector |
Resistance value |
||
|
Connector No. |
Terminal No. |
||
|
FC01 |
21 |
22 |
108 132 |
Normal or abnormal?
Normal >> turn to 3.
Abnormal >> repair PCU branch line.
3. Check electricity supply and ground circuit
Check PCU electricity supply and ground circuit. Refer to “Electric Control System-diagnosis method”.
Normal or abnormal?
Normal (current malfunction) >> replace PCU. Refer to “Electric Control System-removal and installation”
Normal (past malfunction)>> Malfunction is detected in PCU branch line.
Abnormal >> repair electricity supply and ground circuit.异常 >>维修供电和接地电路。
LBC branch line
Diagnosis method
Warning
● The electric vehicle has a high-voltage battery. If the operation on the vehicle and high-voltage parts is incorrect, there are risks of leakage of electricity, electric shock, or similar accidents. Thus, it is mandatory to follow correct procedures to check and maintain.
● Before checking and maintaining high-voltage system and its insulation, be sure that repair switch is disconnected, to cut off high-voltage electrical source.
● Before starting the operation on high-voltage system, be sure to wear insulated protection equipment, including gloves, shoes, and glasses.
● When checking high-voltage system, please clarify the responsibility of each staff and ensure no one touching the vehicle. When there is no maintenance operation, please take insulated protection on the high-voltage sections to prevent anyone touching.
Caution:注意：
● Under READY status, it is forbidden to disconnect maintenance switch.
1. Turn key to “LOCK” position or plug out.
2. Disconnect 12V battery negative pole wire.
3 Check whether LBC terminal and connector is damaged, bended, or loose (connector side and wire side).
Abnormal >> repair terminal or connector.
2. Check whether wire circuit open
2 Check LBC wire connector terminal resistance value.
|
Resistance value（Ω） |
|||
|
Terminal No. |
|||
|
A |
B |
108 ～ 132 |
|
Abnormal >> repair LBC branch line.
3.Preparation
Warning:
Disconnect high-voltage circuit! Refer to “Overview-how to disconnect high-voltage”.
1. Check high-voltage circuit voltage.
Disconnect power battery high-voltage connector. Refer to “Power Battery System-removal and installation”.
|
|
Danger: There is electric shock hazard if you ouch high-voltage component without wearing respective protection equipment. |
|
