Nissan Leaf. Manual - part 338

BRC-142

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

PARKING BRAKE SWITCH

PARKING BRAKE SWITCH

Component Function Check

INFOID:0000000010120110

1.

CHECK PARKING BRAKE SWITCH OPERATION

Operate the parking brake pedal. Then check that the brake warning lamp in the combination meter turns ON/

OFF correctly.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Proceed to 

BRC-142, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010120111

Regarding Wiring Diagram information. Refer to 

BRC-58, "Wiring Diagram"

.

1.

CHECK PARKING BRAKE SWITCH CIRCUIT

1. Turn the power switch OFF.

2. Disconnect parking brake switch harness connector. 

3. Disconnect combination meter harness connector. 

4. Check continuity between parking brake switch harness connector and combination meter harness con-

nector.

5. Check continuity between parking brake switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK PARKING BRAKE SWITCH

Check the parking brake switch. Refer to 

BRC-142, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace parking brake switch. Refer to 

PB-15, "Removal and Installation"

.

3.

CHECK COMBINATION METER

Check combination meter. Refer to 

MWI-49, "CONSULT Function (METER/M&A)"

.

Is the inspection result normal?

YES

>> Check each pin terminals for damage or loose connection with harness connector. If any items

are damaged, repair or replace error-detected parts.

NO

>> Repair or replace combination meter. Refer to 

MWI-102, "Removal and Installation"

.

Component Inspection

INFOID:0000000010120112

1.

CHECK PARKING BRAKE SWITCH

1. Turn the power switch OFF.

2. Remove parking brake switch. Refer to 

PB-15, "Removal and Installation"

.

Parking brake switch

Combination meter

Continuity

Connector

Terminal

Connector

Terminal

E4

1

M34

24

Yes

Parking brake switch

—

Continuity

Connector

Terminal

E4

1

Ground

No

PARKING BRAKE SWITCH

BRC-143

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C

D

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G

H

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A

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BRC

N

O

P

3. Check continuity between parking brake switch connector terminal.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace parking brake switch. Refer to 

PB-15, "Removal and Installation"

.

Parking brake switch

—

Condition

Continuity

Terminal

1

Ground

When the parking brake switch is operated.

Yes

When the parking brake switch is not operated.

No

BRC-144

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

ABS WARNING LAMP

ABS WARNING LAMP

Component Function Check

INFOID:0000000010120113

1.

CHECK ABS WARNING LAMP FUNCTION

Check that ABS warning lamp in combination meter turns ON for several seconds after power switch is turned

ON.

CAUTION:

Never set the vehicle to READY.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Proceed to 

BRC-144, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010120114

1.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND CIR-

CUIT
Perform the trouble diagnosis for ABS actuator and electric unit (control unit) power supply and ground circuit.

Refer to 

BRC-137, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

PERFORM SELF DIAGNOSTIC

With CONSULT

1. Turn the power switch OFF 

→ ON.

CAUTION:

• Be sure to wait of 10 seconds after turning power switch OFF or ON.

• Set the vehicle to READY.

2. Repeat step 1 two or more times.

3. Perform “Self Diagnostic Result” of “ABS”.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

BRC-56, "DTC Index"

.

NO

>> GO TO 3.

3.

CHECK ABS WARNING LAMP SIGNAL

With CONSULT

1. Select “ABS”, “Data Monitor” and “ABS WARN LAMP” according to this order.

2. Turn the power switch OFF.

3. Check that data monitor displays “On” for several seconds after power switch is turned ON and then

changes to “Off”.

CAUTION:

Never set the vehicle to READY.

Is the inspection result normal?

YES

>> Check the combination meter. Refer to 

MWI-49, "CONSULT Function (METER/M&A)"

.

NO

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

BRC-162, "Removal and Installa-

tion"

.

BRAKE WARNING LAMP

BRC-145

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C

D

E

G

H

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A

B

BRC

N

O

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BRAKE WARNING LAMP

Component Function Check

INFOID:0000000010120115

1.

CHECK BRAKE WARNING LAMP FUNCTION (1)

Check that brake warning lamp in combination meter turns ON for several seconds after power switch is

turned ON.

CAUTION:

Never set the vehicle to READY.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Proceed to 

BRC-145, "Diagnosis Procedure"

.

2.

CHECK BRAKE WARNING LAMP FUNCTION (2)

Check that brake warning lamp in combination meter turns ON/OFF when parking brake is operated.

NOTE:

Brake warning lamp turns ON when parking brake is operated (when parking brake switch is ON).
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check parking brake switch system. Refer to 

BRC-142, "Diagnosis Procedure"

.

3.

CHECK BRAKE WARNING LAMP FUNCTION (2)

Check that brake warning lamp in combination meter turns ON/OFF when brake fluid level switch is operated

while brake fluid level in reservoir tank is with the specified level.

NOTE:

Brake warning lamp turns ON when brake fluid is less than the specified level (when brake fluid level switch is

ON).
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Check the brake fluid level switch system. Refer to 

BRC-115, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010120116

1.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND CIR-

CUIT

Perform the trouble diagnosis for ABS actuator and electric unit (control unit) power supply and ground circuit.

Refer to 

BRC-137, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

PERFORM SELF DIAGNOSTIC

With CONSULT

1. Turn the power switch OFF 

→ ON.

CAUTION:

• Be sure to wait of 10 seconds after turning power switch OFF or ON.

• Set the vehicle to READY.

2. Repeat step 1 two or more times.

3. Perform “Self Diagnostic Result” of “ABS”.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

BRC-56, "DTC Index"

.

NO

>> GO TO 3.

3.

CHECK COMBINATION METER

Check the combination meter. Refer to 

MWI-49, "CONSULT Function (METER/M&A)"

.

Is the inspection result normal?