Nissan Leaf. Manual - part 1278

WCS

DIAGNOSIS AND REPAIR WORKFLOW

WCS-39

< BASIC INSPECTION >

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000010121636

OVERALL SEQUENCE

DETAILED FLOW

1.

OBTAIN INFORMATION ABOUT SYMPTOM

Interview the customer to obtain as much information as possible about the conditions and environment under

which the malfunction occurred.

>> GO TO 2.

2.

CHECK SYMPTOM

• Check the symptom based on the information obtained from the customer.

• Check if any other malfunctions are present.

>> GO TO 3.

3.

CHECK CONSULT SELF-DIAGNOSIS RESULTS

Connect CONSULT and perform “Self Diagnosis”.  Refer to 

MWI-65, "DTC Index"

.

AWNIA2375GB

WCS-40

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

Are self-diagnosis results normal?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

NARROW DOWN MALFUNCTIONING PARTS BY SYMPTOM DIAGNOSIS

Perform symptom diagnosis and narrow down the malfunctioning parts.  

>> GO TO 5.

5.

REPAIR OR REPLACE MALFUNCTIONING PARTS

Repair or replace malfunctioning parts.

NOTE:

If DTC is displayed, erase DTC after repairing or replacing malfunctioning parts.

>> GO TO 6.

6.

FINAL CHECK

Check that the warning buzzer in the combination meter operates normally.
Does it operate normally?

YES

>> Inspection End.

NO

>> GO TO 1.

WCS

POWER SUPPLY AND GROUND CIRCUIT

WCS-41

< DTC/CIRCUIT DIAGNOSIS >

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DTC/CIRCUIT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

COMBINATION METER
COMBINATION METER : Diagnosis Procedure

INFOID:0000000010505316

Regarding Wiring Diagram information, refer to 

MWI-68, "Wiring Diagram"

.

1.

CHECK FUSES

Check that the following fuses are not blown:

Is the fuse blown?

YES

>> Replace the blown fuse after repairing the affected circuit.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between combination meter harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness or connector.

3.

CHECK GROUND CIRCUIT

1. Power switch OFF.

2. Disconnect combination meter connector.

3. Check continuity between combination meter harness connector and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness or connector.

BCM
BCM : Diagnosis Procedure

INFOID:0000000010563527

Regarding Wiring Diagram information, refer to 

BCS-50, "Wiring Diagram"

.

Power source

Fuse No.

Battery

11

Power switch ON 

5

Terminals

Power switch position

Voltage

(Approx.)

(+)

(

−)

Combination meter

Ground

Connector

Terminal

M34

1

OFF

Battery voltage

3

ON

Combination meter

Ground

Continuity

Connector

Terminal

M34

5

Yes

6

WCS-42

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

1.

CHECK FUSE AND FUSIBLE LINK

Check that the following fuse and fusible link are not blown.

Is the fuse or fusible link blown?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

1. Disconnect BCM connector M25.

2. Check voltage between BCM connector M25 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness or connectors.

3.

CHECK GROUND CIRCUIT

Check continuity between BCM connector M25 and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness or connectors.

Terminal No.

Signal name

Fuse and fusible link No.

57

Battery power supply

9 (10A)

70

H (40A)

BCM

Ground

Voltage

(Approx.)

Connector

Terminal

M25

57

—

Battery voltage

70

BCM

Ground

Continuity

Connector

Terminal

M25

67

—

Yes