Nissan Leaf. Manual — part 920
LAN-142
< DTC/CIRCUIT DIAGNOSIS >
[CAN SYSTEM (TYPE 2)]
EV SYSTEM CAN CIRCUIT
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
EV SYSTEM CAN CIRCUIT
LAN-143
< DTC/CIRCUIT DIAGNOSIS >
[CAN SYSTEM (TYPE 2)]
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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
LAN-144
< DTC/CIRCUIT DIAGNOSIS >
[CAN SYSTEM (TYPE 3)]
MAIN LINE BETWEEN IPDM-E AND DLC CIRCUIT
DTC/CIRCUIT DIAGNOSIS
MAIN LINE BETWEEN IPDM-E AND DLC CIRCUIT
Diagnosis Procedure
INFOID:0000000010415403
1.
CHECK CONNECTOR
1. Turn the power switch OFF.
2. Disconnect the 12V battery cable from the negative terminal. Refer to
LAN-26, "Precautions for Removing
3. Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).
-
Harness connector E107
-
Harness connector B7
-
Harness connector B3
-
Harness connector M21
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair the terminal and connector.
2.
CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the following harness connectors.
-
IPDM E/R
-
Harness connectors E107 and B7
2. Check the continuity between the IPDM E/R harness connector and the harness connector.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair the main line between the IPDM E/R and the harness connector E107.
3.
CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the harness connectors B3 and M21.
2. Check the continuity between the harness connectors.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair the main line between the harness connectors B7 and B3.
4.
CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
Check the continuity between the harness connector and the data link connector.
Is the inspection result normal?
IPDM E/R harness connector
Harness connector
Continuity
Connector No.
Terminal No.
Connector No.
Terminal No.
E13
27
E107
1
Existed
26
2
Existed
Harness connector
Harness connector
Continuity
Connector No.
Terminal No.
Connector No.
Terminal No.
B7
1
B3
31
Existed
2
32
Existed
Harness connector
Data link connector
Continuity
Connector No.
Terminal No.
Connector No.
Terminal No.
M21
31
M4
6
Existed
32
14
Existed
LAN
MAIN LINE BETWEEN IPDM-E AND DLC CIRCUIT
LAN-145
< DTC/CIRCUIT DIAGNOSIS >
[CAN SYSTEM (TYPE 3)]
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YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the IPDM E/R and the data link connector.
NO
>> Repair the main line between the harness connector M21 and the data link connector.
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