Nissan Leaf. Manual - part 168

BCS-66

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000010122350

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.

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

BCS

COMBINATION SWITCH INPUT CIRCUIT

BCS-67

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

COMBINATION SWITCH INPUT CIRCUIT

Diagnosis Procedure

INFOID:0000000010122351

Regarding Wiring Diagram information, refer to 

BCS-50, "Wiring Diagram"

.

1.

CHECK INPUT 1 - 5 CIRCUIT FOR OPEN

1. Turn power switch OFF.

2. Disconnect BCM connector M24 and combination switch connector.

3. Check continuity between BCM connector M24 and combination switch connector M27.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace harness or connectors.

2.

CHECK INPUT 1 - 5 CIRCUIT FOR SHORT

Check for continuity between BCM connector M24 and ground.

Is the inspection result normal?

YES

>> Repair or replace harness or connectors.

NO

>> GO TO 3.

3.

CHECK BCM OUTPUT VOLTAGE

1. Connect BCM connector M24.

2. Check voltage between BCM connector M24 and ground.

Is the inspection result normal?

Combination switch 

signal

BCM

Combination switch

Continuity

Connector

Terminal

Connector

Terminal

INPUT 1

M24

36

M27

11

Yes

INPUT 2

35

9

INPUT 3

34

7

INPUT 4

33

10

INPUT 5

32

13

Combination switch

signal

BCM

Ground

Continuity

Connector

Terminal

INPUT 1

M24

36

—

No

INPUT 2

35

INPUT 3

34

INPUT 4

33

INPUT 5

32

BCM signal

BCM

Ground

Voltage

(Approx.)

Connector

Terminal

OUTPUT 1

M24

36

Refer to 

BCS-28, "Refer-

ence Value"

.

OUTPUT 2

35

OUTPUT 3

34

OUTPUT 4

33

OUTPUT 5

32

BCS-68

< DTC/CIRCUIT DIAGNOSIS >

COMBINATION SWITCH INPUT CIRCUIT

YES

>> Replace combination switch. Refer to 

BCS-73, "Removal and Installation"

.

NO

>> Replace BCM. Refer to 

BCS-72, "Removal and Installation"

.

BCS

COMBINATION SWITCH OUTPUT CIRCUIT

BCS-69

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

COMBINATION SWITCH OUTPUT CIRCUIT

Diagnosis Procedure

INFOID:0000000010122352

Regarding Wiring Diagram information, refer to 

BCS-50, "Wiring Diagram"

.

1.

CHECK OUTPUT 1 - 5 CIRCUIT FOR OPEN

1. Turn power switch OFF.

2. Disconnect BCM connector M24 and combination switch connector.

3. Check continuity between BCM connector M24 and combination switch connector M27.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace harness or connectors.

2.

CHECK OUTPUT 1 - 5 CIRCUIT FOR SHORT

Check for continuity between BCM connector M24 and ground.

Is the inspection result normal?

YES

>> Repair or replace harness or connectors.

NO

>> GO TO 3.

3.

CHECK BCM INPUT VOLTAGE

1. Connect BCM connector M24 and combination switch connector.

2. Turn power switch ON.

3. Check voltage between BCM connector M24 and ground.

Combination switch 

signal

BCM

Combination switch

Continuity

Connector

Terminal

Connector

Terminal

OUTPUT 1

M24

6

M27

12

Yes

OUTPUT 2

5

14

OUTPUT 3

4

5

OUTPUT 4

3

2

OUTPUT 5

2

8

Combination switch

signal

BCM

Ground

Continuity

Connector

Terminal

OUTPUT 1

M24

6

—

No

OUTPUT 2

5

OUTPUT 3

4

OUTPUT 4

3

OUTPUT 5

2

BCM signal

BCM

Ground

Voltage

(Approx.)

Connector

Terminal

INPUT 1

M68

6

Refer to 

BCS-28, "Refer-

ence Value"

.

INPUT 2

5

INPUT 3

4

INPUT 4

3

INPUT 5

2