Nissan Leaf. Instruction — part 935
LAN-202
< DTC/CIRCUIT DIAGNOSIS >
[CAN SYSTEM (TYPE 4)]
EV SYSTEM CAN CIRCUIT
EV SYSTEM CAN CIRCUIT
Diagnosis Procedure
INFOID:0000000010415454
DANGER:
Since hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of
electric shock, electric leakage, or similar accidents if the high voltage component and vehicle are
handled incorrectly. Be sure to follow the correct work procedures when performing inspection and
maintenance.
WARNING:
• Be sure to remove the service plug in order to disconnect the high voltage circuits before perform-
ing inspection or maintenance of high voltage system harnesses and parts.
• The removed service plug must always be carried in a pocket of the responsible worker or placed in
the tool box during the procedure to prevent the plug from being connected by mistake.
• Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses
before beginning work on the high voltage system.
• Never allow workers other than the responsible person to touch the vehicle containing high voltage
parts. To keep others from touching the high voltage parts, these parts must be covered with an insu-
lating sheet except when using them.
CAUTION:
Never bring the vehicle into the READY status with the service plug removed unless otherwise
instructed in the Instruction. A malfunction may occur if this is not observed.
1.
PRECONDITIONING
WARNING:
Disconnect the high voltage. Refer to
GI-33, "How to Disconnect High Voltage"
Check voltage in high voltage circuit. (Check that condenser are discharged.)
1. Lift up the vehicle and remove the Li-ion battery under covers. Refer to
2. Disconnect high voltage harness connector and PTC heater harness connector from front side of Li-ion
battery. Refer to
EVB-181, "Removal and Installation"
.
3. Measure voltage between high voltage harness connector terminals and PTC heater harness connector
terminals.
DANGER:
Touching high voltage components without using the appropriate protective equipment will
cause electrocution.
CAUTION:
For voltage measurements, use a tester which can measure to 500 V or higher.
>> GO TO 2.
2.
CONNECTOR INSPECTION
Standard
: 5 V or less
JPCIA0296ZZ
LAN
EV SYSTEM CAN CIRCUIT
LAN-203
< DTC/CIRCUIT DIAGNOSIS >
[CAN SYSTEM (TYPE 4)]
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1. Turn the power switch OFF.
2. Disconnect the 12V battery cable from the negative terminal. Refer to
LAN-26, "Precautions for Removing
3. Disconnect all the control unit connectors on EV system CAN circuit. For the removal of Li-ion battery con-
troller, refer to
EVB-201, "LI-ION BATTERY CONTROLLER : Removal and Installation"
4. Check terminals and connectors for damage, bend and loose connection.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair the terminal and connector.
3.
CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the data link connector terminals.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Check the harness and repair the root cause.
4.
CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the data link connector and the ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Check the harness and repair the root cause.
5.
CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the vehicle communication harness connector terminals. Refer to
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair the vehicle communication harness.
6.
CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the vehicle communication harness connector and the ground. Refer to
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair the vehicle communication harness.
Data link connector
Continuity
Connector No.
Terminal No.
M4
13
12
Not existed
Data link connector
Ground
Continuity
Connector No.
Terminal No.
M4
13
Not existed
12
Not existed
Vehicle communication harness (LB1)
Continuity
Terminal No.
1
2
Not existed
Vehicle communication harness (LB1)
Ground
Continuity
Terminal No.
1
Not existed
2
Not existed
LAN-204
< DTC/CIRCUIT DIAGNOSIS >
[CAN SYSTEM (TYPE 4)]
EV SYSTEM CAN CIRCUIT
7.
CHECK VCM AND LI-ION BATTERY CONTROLLER TERMINATION CIRCUIT
1. Remove the VCM.
2. Check the resistance between the VCM terminals.
3. Remove the Li-ion battery controller. Refer to
EVB-201, "LI-ION BATTERY CONTROLLER : Removal and
.
4. Check the resistance between the Li-ion battery controller terminals.
Is the measurement value within the specification?
YES
>> GO TO 8.
NO
>> Replace the VCM and/or the Li-ion battery controller.
8.
CHECK SYMPTOM
Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced.
Inspection result
Reproduced>>GO TO 9.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is
detected.
9.
CHECK CONTROL UNIT REPRODUCTION
Perform the reproduction test as per the following procedure for each control unit.
1. Turn the power switch OFF.
2. Disconnect the 12V battery cable from the negative terminal. Refer to
LAN-26, "Precautions for Removing
3. Disconnect one of the control unit connectors of EV system CAN circuit.
WARNING:
Disconnect the high voltage when disconnecting the Li-ion battery connector (B24). Refer to
33, "How to Disconnect High Voltage"
.
NOTE:
VCM and Li-ion battery controller have a termination circuit. Check other control units first.
4. Connect the 12V battery cable to the negative terminal. Check if the symptoms described in the “Symp-
tom (Results from interview with customer)” are reproduced.
NOTE:
Although control unit-related error symptoms occur, do not confuse them with other symptoms.
Inspection result
Reproduced>>Connect the connector. Check other control units as per the above procedure.
Non-reproduced>>Replace the control unit whose connector was disconnected.
VCM
Resistance (
Ω)
Terminal No.
24
25
Approx. 108 – 132
Li-ion battery controller
Resistance (
Ω)
Terminal No.
1
13
Approx. 108 – 132
MA-1
MAINTENANCE
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CONTENTS
MAINTENANCE
PRECAUTION . . . . . . . . . . . ...
PRECAUTIONS . . . . . . . . . . . . ...
Precaution for Technicians Using Medical Electric
. ..
High Voltage Precautions . . . . . . . . . . ..
PREPARATION . . . . . . . . . . .
PREPARATION . . . . . . . . . . . . ...
Commercial Service Tool . . . . . . . . . . ..
PERIODIC MAINTENANCE . . . . . . ..
GENERAL MAINTENANCE . . . . . . . .
FOR USA AND CANADA . . . . . . . . . . ....
FOR USA AND CANADA : Explanation of General
Maintenance . . . . . . . . . . . . . . . ..
FOR MEXICO . . . . . . . . . . . . . . . ..
FOR MEXICO : General Maintenance . . . . . ..
PERIODIC MAINTENANCE . . . . . . . ...
FOR USA AND CANADA . . . . . . . . . . ..
FOR USA AND CANADA : Introduction of Periodic
Maintenance . . . . . . . . . . . . . . .
FOR USA AND CANADA : Schedule 1 . . . . ...
FOR USA AND CANADA : Schedule 2 . . . . ...
FOR MEXICO . . . . . . . . . . . . . . .
FOR MEXICO : Periodic Maintenance . . . . .
RECOMMENDED FLUIDS AND LUBRI-
CANTS . . . . . . . . . . . . . . . .
FOR USA AND CANADA . . . . . . . . . . ..
FOR USA AND CANADA : Fluids and Lubricants .
FOR USA AND CANADA : Anti-Freeze Coolant
Mixture Ratio . . . . . . . . . . . . . . ...
FOR MEXICO . . . . . . . . . . . . . . . .
FOR MEXICO : Fluids and Lubricants . . . . . .
FOR MEXICO : Coolant Mixture Ratio . . . . .
EV SYSTEM MAINTENANCE . . . . . . ...
COOLANT . . . . . . . . . . . . . . . . ..
COOLANT : Inspection . . . . . . . . . . .
COOLANT : Draining . . . . . . . . . . . ...
COOLANT : Refilling . . . . . . . . . . . ...
RESERVOIR TANK CAP . . . . . . . . . . ...
RESERVOIR TANK CAP : Inspection . . . . . .
CHARGE PORT . . . . . . . . . . . . . . .
CHARGE PORT : Inspection . . . . . . . . ...
CHASSIS MAINTENANCE . . . . . . . ...
REDUCTION GEAR OIL . . . . . . . . . . .
REDUCTION GEAR OIL : Inspection . . . . . ..
REDUCTION GEAR OIL : Draining and Refilling .
WHEELS . . . . . . . . . . . . . . . . .
WHEELS : Inspection . . . . . . . . . . . ..
WHEELS : Wheel Balance Adjustment . . . . ...
WHEELS : Tire Rotation . . . . . . . . . . ..
BRAKE FLUID LEVEL AND LEAKS . . . . . . .
BRAKE FLUID LEVEL AND LEAKS : Inspection .
BRAKE LINES AND CABLES . . . . . . . . ...
BRAKE LINES AND CABLES : Inspection . . . ..
BRAKE FLUID . . . . . . . . . . . . . . ...
BRAKE FLUID : Changing . . . . . . . . . ...
DISC BRAKE . . . . . . . . . . . . . . . .
DISC BRAKE : Inspection . . . . . . . . . ...
DISC BRAKE : Front Disc Brake . . . . . . . .
DISC BRAKE : Rear Disc Brake . . . . . . . ..
STEERING GEAR AND LINKAGE . . . . . . .
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