Nissan Leaf. Manual - part 337

BRC-138

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

POWER SUPPLY AND GROUND CIRCUIT

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT

1. Turn the power switch OFF.

2. Check the 30A fusible link (#L).

3. Check the continuity and short circuit between ABS actuator and electric unit (control unit) harness con-

nector terminal (1) and 30A fusible link (#L).

Is the inspection result normal?

YES

>> Perform trouble diagnosis for 12V battery power supply. Refer to 

PG-15, "Wiring Diagram — Bat-

tery Power Supply —"

.

NO

>> Repair or replace error-detected parts.

5.

CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE POWER SUPPLY

1. Turn the power switch OFF.

2. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

3. Turn the power switch ON

CAUTION:

Never set the vehicle to READY.

4. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 6.

6.

CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE POWER SUPPLY CIRCUIT

1. Turn the power switch OFF.

2. Check the 50A fusible link (#J).

3. Check the continuity and short circuit between ABS actuator and electric unit (control unit) harness con-

nector terminal (2) and 50A fusible link (#J).

Is the inspection result normal?

YES

>> Perform trouble diagnosis for 12V battery power supply. Refer to 

PG-26, "Wiring Diagram—On

Power Supply—"

.

NO

>> Repair or replace error-detected parts.

7.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT

Check the continuity between ABS actuator and electric unit (control unit) harness connector and the ground.

ABS actuator and electric unit (control unit)

—

Voltage

(Approx.)

Connector

Terminal

E35

1

Ground

Battery voltage

ABS actuator and electric unit (control unit)

—

Voltage

(Approx.)

Connector

Terminal

E35

2

Ground

Battery voltage

ABS actuator and electric unit (control unit)

—

Voltage

(Approx.)

Connector

Terminal

E35

2

Ground

Battery voltage

POWER SUPPLY AND GROUND CIRCUIT

BRC-139

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair or replace error-detected parts.

8.

CHECK TERMINAL

Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with har-

ness connector.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace error-detected parts.

ABS actuator and electric unit (control unit)

—

Continuity

Connector

Terminal

E35

3

Ground

Yes

4

BRC-140

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

VDC OFF SWITCH

VDC OFF SWITCH

Component Function Check

INFOID:0000000010120107

1.

CHECK VDC OFF SWITCH OPERATION

Check that VDC OFF indicator lamp in combination meter turns ON/OFF when VDC OFF switch is operated.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Proceed to diagnosis procedure. Refer to 

BRC-140, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010120108

Regarding Wiring Diagram information. Refer to 

BRC-58, "Wiring Diagram"

.

1.

CHECK VDC OFF SWITCH CIRCUIT

1. Turn the power switch OFF.

2. Disconnect ABS actuator and electric unit (control unit) harness connector.

3. Disconnect VDC OFF switch harness connector.

4. Check the continuity between ABS actuator and electric unit (control unit) harness connector and VDC

OFF switch harness connector.

5. Check the continuity between ABS actuator and electric unit (control unit) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK VDC OFF SWITCH GROUND CIRCUIT

Check the continuity between VDC OFF switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK VDC OFF SWITCH

Check the VDC OFF switch. Refer to 

BRC-141, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace VDC OFF switch. Refer to 

BRC-166, "Removal and Installation"

.

4.

CHECK VDC OFF SWITCH SIGNAL

With CONSULT

ABS actuator and electric unit (control unit)

VDC OFF switch

Continuity

Connector

Terminal

Connector

Terminal

E35

5

M28

6

Yes

ABS actuator and electric unit (control unit)

—

Continuity

Connector

Terminal

E35

5

Ground

No

VDC OFF switch

—

Continuity

Connector

Terminal

M28

8

Ground

Yes

VDC OFF SWITCH

BRC-141

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

1. Connect ABS actuator and electric unit (control unit) harness connector.

2. Connect VDC OFF switch harness connector.

3. Select “ABS”, “DATA MONITOR” and “OFF SW” according to this order. Check the VDC OFF switch sig-

nal.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 5.

5.

CHECK TERMINAL

• Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with

harness connector.

• Check the VDC OFF switch pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

>> Replace ABS actuator and electric unit (control unit). Refer to 

BRC-162, "Removal and Installa-

tion"

.

NO

>> Repair or replace error-detected parts.

Component Inspection

INFOID:0000000010120109

1.

CHECK VDC OFF SWITCH

1. Turn the power switch OFF.

2. Disconnect triple switch harness connector.

3. Check the continuity between terminals of VDC OFF switch connector.

Is the inspection result normal?

YES

>> Inspection End

NO

>> Replace VDC OFF switch. Refer to 

BRC-166, "Removal and Installation"

.

Condition

DATA MONITOR

When VDC OFF switch is pressed and VDC OFF indicator lamp in combination 
meter is in ON status

On

When VDC OFF switch is pressed and VDC OFF indicator lamp in combination 
meter is in OFF status

Off

VDC OFF switch

Condition

Continuity

Terminal

8 – 9

When VDC OFF switch is pressed

Yes

When VDC OFF switch is not pressed

No