Nissan Leaf. Manual - part 909

LAN-98

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

STRG BRANCH LINE CIRCUIT

STRG BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000010415353

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 steering angle sensor 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 steering angle sensor.

2. Check the resistance between the steering angle sensor harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the steering angle sensor branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the steering angle sensor. Refer to 

BRC-58, "Wiring Dia-

gram"

.

Is the inspection result normal?

YES (Present error)>>Replace the steering angle sensor. Refer to 

BRC-165, "Removal and Installation"

.

YES (Past error)>>Error was detected in the steering angle sensor branch line.

NO

>> Repair the power supply and the ground circuit.

Steering angle sensor harness connector

Resistance (

Ω)

Connector No.

Terminal No.

M30

5

2

Approx. 54 – 66

LAN

A-BAG BRANCH LINE CIRCUIT

LAN-99

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

C

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A-BAG BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000010415354

WARNING:

Always observe the following items for preventing accidental activation.

• Before servicing, turn power switch OFF, disconnect 12V battery negative terminal, and wait 3 min-

utes or more. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device.

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 air bag diagnosis sensor unit for damage, bend and loose con-

nection (unit side and connector side).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the main harness.

2.

CHECK AIR BAG DIAGNOSIS SENSOR UNIT

Check the air bag diagnosis sensor unit. Refer to 

SRC-34, "Work Flow"

.

Is the inspection result normal?

YES

>> Replace the main harness.

NO

>> Replace parts whose air bag system has a malfunction.

LAN-100

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

VSP BRANCH LINE CIRCUIT

VSP BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000010415357

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 approaching vehicle sound for pedestrians (VSP) 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 approaching vehicle sound for pedestrians (VSP) control unit.

2. Check the resistance between the approaching vehicle sound for pedestrians (VSP) control unit harness

connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the approaching vehicle sound for pedestrians (VSP) control unit branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the approaching vehicle sound for pedestrians (VSP) control

unit. Refer to 

VSP-47, "APPROACHING VEHICLE SOUND FOR PEDESTRIANS (VSP) CONTROL UNIT :

Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the approaching vehicle sound for pedestrians (VSP) control unit. Refer to

VSP-67, "Removal and Installation"

.

YES (Past error)>>Error was detected in the approaching vehicle sound for pedestrians (VSP) control unit

branch line.

NO

>> Repair the power supply and the ground circuit.

Approaching vehicle sound for pedestrians (VSP) control unit harness connector

Resistance (

Ω)

Connector No.

Terminal No.

M47

4

12

Approx. 54 – 66

LAN

BCM BRANCH LINE CIRCUIT

LAN-101

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

C

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BCM BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000010415358

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 BCM 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 BCM.

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

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the BCM branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

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

BCS-66, "Diagnosis Procedure"

.

Is the inspection result normal?

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

BCS-72, "Removal and Installation"

.

YES (Past error)>>Error was detected in the BCM branch line.

NO

>> Repair the power supply and the ground circuit.

BCM harness connector

Resistance (

Ω)

Connector No.

Terminal No.

M24

39

40

Approx. 108 – 132