Precaution for engineer using medical electronics
Forbidden operation
● 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.
Normal charging precaution
● 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.
● 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.
Inspection for key point before maintenance
The high voltage system may automatically operate, so make sure there is no setting of remote air conditioning and regular charge before maintenance.
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:
② 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.
③ 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.
④ 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.
Reminder：
● 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.
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Name |
Picture |
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Power tool |
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Pedestrian warning system layout
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2 Pedestrian warning controller |
● Pedestrian warning controller is installed in central channel.
● Pedestrian warning controller receives signal of speed, reversing, charging connection, charging start from vehicle control unit, judge and handle, and send corresponding sound signal to pedestrian warning horn.
Pedestrian warning horn
● Pedestrian warning horn is installed on the vehicle front left longeron.
● Pedestrian warning horn receives and enlarges sound signal from pedestrian warning controller.
System principle
System introduction
Pedestrian warning controller receives following signals from vehicle control unit (VCU):
Speed signal
Charging connection signal
Charging start signal
Reversing signal
Electric switch of “ON” signal
Pedestrian warning controller send bellowing signal to dashboard
Malfunction signal
System function
Pedestrian warning controller receives signal of speed, reversing, charging connection, charging start from vehicle control unit, judge and handle, and send corresponding sound signal to pedestrian warning horn.
Pedestrian warning system owns function of forwarding phonation, reversing phonation, charging connection phonation, charging start phonation.
Forwarding phonation function
● The frequency of phonation when forwarding is risen with increased speed.
● When the vehicle is moving forward, VCU sends speed signal to pedestrian warning controller.
● Pedestrian warning controller receives, judges, handles signal from VCU and sends phonation signal to pedestrian warning horn.
Condition for forwarding phonation
● ①-②Vehicle speeds up from 1km/h to 30km/h and phonate.
● ③-④Vehicle reduces speed from 25km/h to 1km/h and phonate.
Reversing phonation function
● When the vehicle is reversing, phonate when the speed is above 1km/h.
● The sound is continuous tinkle.
● When the vehicle is reversing, VCU sends reversing signal to pedestrian warning controller.
● Pedestrian warning controller receives, judges, handles signal from VCU and sends phonation signal to pedestrian warning horn.
Condition for reversing phonation
● The vehicle is moving backward.
● The vehicle speed is above 1km/h.
Charging connection phonation function
● It phonates when charging plug is inserted in vehicle charging plug.
● The sound is short beep.
● When the charging plug is inserted in vehicle charging plug, VCU sends charging connection signal to pedestrian warning controller.
● Pedestrian warning controller receives, judges, handles signal from VCU and sends phonation signal to pedestrian warning horn.
Charging start phonation function
● It phonates when the vehicle starts charging.(The charging current is more than 1A)
● The sound is short beep.
● After the vehicle starts to charge, VCU send charging signal to pedestrian warning controller.
● Pedestrian
warning controller receives, judges, handles signal from VCU and sends
phonation signal to pedestrian warning horn.
Harness
framework
Harness
Connector information
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Connector serial number |
F05 |
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Connector name |
Pedestrian warning horn |
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Connector model |
0417707 |
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Terminal number |
Line color |
Signal name |
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1 |
RW |
Pedestrian warning horn power source (anode) |
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2 |
BL |
Pedestrian warning horn power source(cathode) |
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Connector serial number |
F16 |
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Connector name |
Low voltage distribution box |
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Connector model |
MG610360 |
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Terminal serial number |
Thread color |
Signal name |
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10 |
R |
Keeping power source another(output) |
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Connector serial number |
F19 |
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Connector name |
Pedestrian warning controller |
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Connector model |
34729-0080 |
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Terminal serial number |
Thread color |
Signal name |
Input or output |
Remark |
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1 |
R |
Power source anode |
Input |
12V |
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2 |
空 |
Empty |
Empty |
Epmty |
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3 |
RW |
Horn （+） |
Output |
Sound signal |
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4 |
BL |
Horn （-） |
Output |
Ground |
|
5 |
B |
电源负极 |
Output |
Ground |
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6 |
Y |
VCU signal (VCU sends to pedestrian warning controller ） |
Input |
Frequency is 5Hz PWM signal |
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7 |
BW |
Dashboard signal Pedestrian warning controller sends to dashboard |
Output |
Duty ratio is 50% PWM signal of 10Hz, 20Hz,30Hz frequency |
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8 |
Empty |
Empty |
Empty |
Empty |
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Connector number |
F21 |
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Connector name |
VCU connector 1 |
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Connector model |
1473244-1 |
|
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Terminal serial number |
Thread color |
Signal name |
|
65 |
Y |
VCU Hard line data input |
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Connector serial number |
M26 |
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Connector name |
Combination instrument |
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Connector model |
1719057-2(Blue) |
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Terminal serial number |
Thread color |
Signal name |
|
10 |
BW |
Pedestrian warning system control signal |
Diagnosis and maintenance procedure
Operation procedure
1 Acquiring malfunction symptom
Communicate with customer to get as more as possible information of the vehicle and environment when failed.
2 Check and confirm symptom
● When the vehicle is running, check whether the pedestrian warning system failure light on the dashboard is ON.
● Confirm malfunction symptom.
● Check if there is any other malfunction.
3 Look for failed components
Judge possible failed components according to symptoms.
4 Repair or replace failed components
Repair or replace failed components
5 Check and confirm the system is working normally.
Check
whether the system is working normally, if not, please repeat the procedure.
Diagnosis
Symptom list
|
Symptom |
Checking list |
Possible failed components |
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No phonation when forwarding at low speed |
Speed signal input by VCU Pedestrian warning horn |
VCU Pedestrian warning controller Pedestrian warning horn |
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No phonation when revsersing |
Speed signal input by VCU Pedestrian warning horn |
VCU Pedestrian warning controller Pedestrian warning horn |
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No phonation when charging connected |
Charging connection signal input by VCU Pedestrian warning horn |
VCU Pedestrian warning controller Pedestrian warning horn |
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No phonation when charging starts |
Charging start signal input by VCU Pedestrian warning horn |
VCU Pedestrian warning controller Pedestrian warning horn |
No phonation when forwarding at low speed
1 Check if there is 12V power source input of harness terminal connector number one needle of pedestrian warning controller
If yes >>Turn to step two
If no >>Check low voltage power source input loop of pedestrian warning controller, please refer to “Ground and Loop”
2 Check whether harness terminal connector number five needle of pedestrian warning controller is connected with vehicle body(Ground)
If yes >>Turn to step three
IF no >> Check grounding loop of pedestrian warning controller, please refer to “Ground and Loop”
3 When the vehicle is forwarding at low speed, use oscilloscope to check harness terminal connector number six needle of pedestrian warning controller and confirm the PWM duty ratio of VCU is in the range of 1% to 60%.
IF yes >>Turn to step four
If no>>Check VCU output, please refer to “Vehicle malfunction diagnosis” in “Electrical vehicle controlling system”
4 Replace pedestrian warning controller and confirm whether there is phonation when forwarding at speed.
If yes>>Finish
If no>>Turn to step five
5 Replace pedestrian warning horn and confirm whether there is phonation when forwarding at low speed
If yes>>Finish
If no>>Repair harness or connector
1 Check if there is 12V power source input of harness terminal connector number one needle of pedestrian warning controller
If yes >>Turn to step two
If no >> Check low voltage power source input loop of pedestrian warning controller, please refer to “Ground and Loop”
2 Check whether harness terminal connector number five needle of pedestrian warning controller is connected with vehicle body(Ground)
If yes >>Turn to step three
IF no >> Check grounding loop of pedestrian warning controller, please refer to “Ground and Loop”
3 When the vehicle is forwarding at low speed, use oscilloscope to check harness terminal connector number six needle of pedestrian warning controller and confirm the PWM duty ratio of VCU is in the range of 83% to 89%.
If yes >>Turn to step four
If no >> Check VCU output, please refer to “Vehicle malfunction diagnosis” in “Electrical vehicle controlling system”
4 Replace pedestrian warning horn and confirm whether there is phonation when reversing
If yes >>Finish
If no >>Turn to step five
5 Replace pedestrian warning horn and confirm whether there is phonation when reversing
If yes >>Finish
If no >>Repair harness or connector
No phonation when charging connected
1 Check if there is 12V power source input of harness terminal connector number one needle of pedestrian warning controller
If yes >>Turn to step two
If no >> Check low voltage power source input loop of pedestrian warning controller, please refer to “Ground and Loop”
2 Check whether harness terminal connector number five needle of pedestrian warning controller is connected with vehicle body(Ground)
If yes >>Turn to step three
If no >> Check grounding loop of pedestrian warning controller, please refer to “Ground and Loop”
3 When the vehicle is forwarding at low speed, use oscilloscope to check harness terminal connector number six needle of pedestrian warning controller and confirm the PWM duty ratio of VCU is in the range of 77% to 83%.
If yes >>Turn to step four
If no >> Check VCU output, please refer to “Vehicle malfunction diagnosis” in “Electrical vehicle controlling system”
4 Replace pedestrian warning horn and confirm whether there is phonation when charging connected.
If yes >>Finish
If no >>Turn to step five
5 Replace pedestrian warning horn and confirm whether there is phonation when charging connected.
If yes >>Finsh
If no >>Repair harness or connector
No phonation when charge starts
1 Check if there is 12V power source input of harness terminal connector number one needle of pedestrian warning controller
If yes >>Turn to step two
If no >> Check low voltage power source input loop of pedestrian warning controller, please refer to “Ground and Loop”
2 Check whether harness terminal connector number five needle of pedestrian warning controller is connected with vehicle body(Ground)
If yes >>Turn to step three
If no >> Check grounding loop of pedestrian warning controller, please refer to “Ground and Loop”
3 When the vehicle is forwarding at low speed, use oscilloscope to check harness terminal connector number six needle of pedestrian warning controller and confirm the PWM duty ratio of VCU is in the range of 89% to 95%.
If yes >>Turn to step four
If no >> Check VCU output, please refer to “Vehicle malfunction diagnosis” in “Electrical vehicle controlling system”
4 Replace pedestrian warning horn and confirm whether there is phonation when charging starts
If yes >>Finish
If no >>Turn to step five
5 Replace pedestrian warning horn and confirm whether there is phonation when charging starts.
If yes >>Finish
If no >>Repair harness or connector
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1 Pedestrian warning horn |
2 Sealing board for left longeron of electric tank |
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3 Pedestrian warning controller |
4 Central channel |
Removal
1 Remove auxiliary dashboard, electronic shift operator.
2 Remove two nuts ((13385-06003)) of pedestrian warning controller.
Attention ：
Try to avoid knock and scratch when removing auxiliary dashboard and electronic shift operator.
Installation
Install it according to reverse order of removal.
Removal
1 Remove from bumper.
2 Remove two bolts (11293-06163) of pedestrian warning horn.
Installation
Install it according to reverse order of removal.
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