Nissan Leaf. Manual - part 1028

PWC-30

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

DTC/CIRCUIT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

BCM
BCM : Diagnosis Procedure

INFOID:0000000010503115

Regarding Wiring Diagram information, refer to 

BCS-50, "Wiring Diagram"

.

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.

POWER WINDOW MAIN SWITCH
POWER WINDOW MAIN SWITCH : Diagnosis Procedure

INFOID:0000000010119947

Regarding Wiring Diagram information, refer to 

PWC-16, "Wiring Diagram"

.

1.

CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH POWER SUPPLY

1. Turn power switch OFF.

2. Disconnect main power window and door lock/unlock switch connector.

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

POWER SUPPLY AND GROUND CIRCUIT

PWC-31

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

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J

L

M

A

B

PWC

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O

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3. Check voltage between main power window and door lock/unlock switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH POWER SUPPLY CIRCUIT

1. Disconnect BCM connector.

2. Check continuity between BCM harness connector and main power window and door lock/unlock switch

harness connector.

3. Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-72, "Removal and Installation"

.

NO

>> Repair or replace harness.

3.

CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH GROUND CIRCUIT

Check continuity between main power window and door lock/unlock switch harness connector and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness.

FRONT POWER WINDOW SWITCH (PASSENGER SIDE)
FRONT POWER WINDOW SWITCH (PASSENGER SIDE) : Diagnosis Procedure

INFOID:0000000010119948

Regarding Wiring Diagram information, refer to 

PWC-16, "Wiring Diagram"

.

1.

CHECK POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH RH POWER SUPPLY

1. Turn power switch OFF.

2. Disconnect power window and door lock/unlock switch RH connector.

3. Turn power switch ON.

4. Check voltage between power window and door lock/unlock switch RH harness connector and ground.

(+)

(-)

Condition

Voltage

(Approx.)

Main power window and door lock/unlock switch

Connector

Terminal 

D35

10

Ground

Power switch

ON

Battery voltage

D36

18

OFF

BCM

Main power window and door lock/unlock switch

Continuity

Connector

Terminal

Connector

Terminal

M25

68

D35

10

Yes

69

D36

18

BCM

Ground

Continuity

Connector

Terminal

M25

68

No

69

Main power window and door lock/unlock switch 

Ground

Continuity 

Connector

Terminal

D35

1

Yes

PWC-32

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 2.

2.

CHECK POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH RH POWER SUPPLY CIRCUIT

1. Turn power switch OFF.

2. Disconnect BCM connector.

3. Check continuity between BCM harness connector and power window and door lock/unlock switch RH

harness connector.

4. Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-72, "Removal and Installation"

.

 NO

>> Repair or replace harness.

REAR POWER WINDOW SWITCH
REAR POWER WINDOW SWITCH : Diagnosis Procedure

INFOID:0000000010119949

Regarding Wiring Diagram information, refer to 

PWC-16, "Wiring Diagram"

.

1.

CHECK REAR POWER WINDOW SWITCH POWER SUPPLY

1. Turn power switch OFF.

2. Disconnect rear power window switch connector.

3. Turn power switch ON.

4. Check voltage between rear power window switch harness connector and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 2.

2.

CHECK REAR POWER WINDOW SWITCH POWER SUPPLY CIRCUIT

1. Turn power switch OFF.

2. Disconnect BCM connector.

3. Check continuity between BCM harness connector and rear power window switch harness connector.

(+)

(-)

Voltage

(Approx.)

Power window and door lock/unlock switch RH

Connector

Terminal

D104

8

Ground

Battery voltage

BCM

Power window and door lock/unlock switch RH

Continuity

Connector

Terminal

 Connector

Terminal

M25

68

D104

8

Yes

BCM

Ground

Continuity

Connector

Terminal

M25

68

No

(+)

(-)

Voltage

(Approx.)

Rear power window switch 

Connector

Terminal

LH

D202

1

Ground

Battery voltage

RH

D302

POWER SUPPLY AND GROUND CIRCUIT

PWC-33

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

PWC

N

O

P

4. Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-72, "Removal and Installation"

.

NO

>> Repair or replace harness.

BCM

Rear power window switch

Continuity

Connector

Terminal

Connector

Terminal

M25

68

LH

D202

1

Yes

RH

D302

BCM

Ground

Continuity

Connector

Terminal

M25

68

No