Nissan Leaf. Manual - part 929

LAN-178

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

MAIN LINE BETWEEN INV/MC AND DLC CIRCUIT

YES (Past error)>>Error was detected in the main line between the traction motor inverter and the data link

connector. 

NO

>> Repair the main line between the harness connector M77 and the data link connector.

LAN

EV/HEV BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT)

LAN-179

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

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EV/HEV BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT)

Diagnosis Procedure

INFOID:0000000010415433

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

Battery Terminal"

.

3. Check the terminals and connectors of the VCM for damage, bend and loose connection (unit side and

connector side).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of VCM.

2. Check the resistance between the VCM harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the VCM branch line (CAN communication circuit side).

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the VCM. Refer to 

EVC-138, "VCM : Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the VCM. Refer to 

EVC-423, "Removal and Installation"

.

YES (Past error)>>Error was detected in the VCM branch line (CAN communication circuit side).

NO

>> Repair the power supply and the ground circuit.

VCM harness connector

Resistance (

Ω)

Connector No.

Terminal No.

E62

75

76

Approx. 108 – 132

LAN-180

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

ABS BRANCH LINE CIRCUIT

ABS BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000010415434

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

Battery Terminal"

.

3. Check the terminals and connectors of the ABS actuator and electric unit (control unit) for damage, bend

and loose connection (unit side and connector side).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of ABS actuator and electric unit (control unit).

2. Check the resistance between the ABS actuator and electric unit (control unit) harness connector termi-

nals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the ABS actuator and electric unit (control unit) branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to

BRC-137, "Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the ABS actuator and electric unit (control unit). Refer to 

BRC-162, "Removal

and Installation"

.

YES (Past error)>>Error was detected in the ABS actuator and electric unit (control unit) branch line.

NO

>> Repair the power supply and the ground circuit.

ABS actuator and electric unit (control unit) harness connector

Resistance (

Ω)

Connector No.

Terminal No.

E35

22

9

Approx. 54 – 66

LAN

BRAKE BRANCH LINE CIRCUIT

LAN-181

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

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BRAKE BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000010415435

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

Battery Terminal"

.

3. Check the terminals and connectors of the electrically-driven intelligent brake unit for damage, bend and

loose connection (unit side and connector side).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of electrically-driven intelligent brake unit.

2. Check the resistance between the electrically-driven intelligent brake unit harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the electrically-driven intelligent brake unit branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the electrically-driven intelligent brake unit. Refer to 

BR-470,

"Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the electrically-driven intelligent brake unit. Refer to 

BR-510, "Removal and

installation"

.

YES (Past error)>>Error was detected in the electrically-driven intelligent brake unit branch line.

NO

>> Repair the power supply and the ground circuit.

Electrically-driven intelligent brake unit harness connector

Resistance (

Ω)

Connector No.

Terminal No.

E34

40

39

Approx. 54 – 66