Nissan Leaf. Manual - part 900

LAN-62

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

BRAKE BRANCH LINE CIRCUIT

BRAKE BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000010120383

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

LAN

IPDM-E BRANCH LINE CIRCUIT

LAN-63

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

C

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F

G

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IPDM-E BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000010120384

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 IPDM E/R 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 IPDM E/R.

2. Check the resistance between the IPDM E/R harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the IPDM E/R branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the IPDM E/R. Refer to 

PCS-28, "Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the IPDM E/R. Refer to 

PCS-29, "Removal and Installation"

.

YES (Past error)>>Error was detected in the IPDM E/R branch line.

NO

>> Repair the power supply and the ground circuit.

IPDM E/R harness connector

Resistance (

Ω)

Connector No.

Terminal No.

E13

27

26

Approx. 54 – 66

LAN-64

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

DLC BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT)

DLC BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT)

Diagnosis Procedure

INFOID:0000000010120385

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 data link connector for damage, bend and loose connection

(connector side and harness side).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

Check the resistance between the data link connector terminals.

Is the measurement value within the specification?

YES (Present error)>>Diagnose again. Refer to 

LAN-17, "Trouble Diagnosis Flow Chart"

.

YES (Past error)>>Error was detected in the data link connector branch line circuit (CAN communication cir-

cuit side).

NO

>> Repair the data link connector branch line (CAN communication circuit side).

Data link connector

Resistance (

Ω)

Connector No.

Terminal No.

M4

6

14

Approx. 54 – 66

LAN

EPS BRANCH LINE CIRCUIT

LAN-65

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

C

D

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EPS BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000010120386

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 EPS 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 EPS control unit.

2. Check the resistance between the EPS control unit harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the EPS control unit branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the EPS control unit. Refer to 

STC-23, "Diagnosis Proce-

dure"

.

Is the inspection result normal?

YES (Present error)>>Replace the steering column assembly. Refer to 

ST-35, "Removal and Installation"

.

YES (Past error)>>Error was detected in the EPS control unit branch line.

NO

>> Repair the power supply and the ground circuit.

EPS control unit harness connector

Resistance (

Ω)

Connector No.

Terminal No.

M37

2

1

Approx. 54 – 66