Infiniti QX56 (Z62). Manual - part 159

VDC OFF SWITCH

BRC-121

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

NO

>> Replace VDC OFF switch. Refer to 

BRC-140, "Removal and Installation"

.

BRC-122

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

ABS WARNING LAMP

ABS WARNING LAMP

Component Function Check

INFOID:0000000006222649

1.

CHECK ABS WARNING LAMP FUNCTION

Check that ABS warning lamp in combination meter turns ON for approx. 1 second after ignition switch is
turned ON.

CAUTION:

Never start engine.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to diagnosis procedure. Refer to 

BRC-122, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006222650

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-113, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

PERFORM THE SELF-DIAGNOSIS

With CONSULT-III.

Perform self-diagnosis for “ABS”.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

BRC-51, "DTC Index"

.

NO

>> GO TO 3.

3.

CHECK ABS WARNING LAMP SIGNAL

With CONSULT-III.

1.

Select “ABS”, “DATA MONITOR” and “ABS WARN LAMP” according to this order.

2.

Turn the ignition switch OFF.

3.

Check that data monitor displays “On” for approx. 1 second after ignition switch is turned ON and then
changes to “Off”.

CAUTION:

Never start engine.

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

BRC-137, "Removal and Installa-

tion"

.

4.

CHECK COMBINATION METER

Check combination meter. Refer to 

MWI-30, "CONSULT-III Function"

.

Is the inspection result normal?

YES

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

BRC-137, "Removal and Installa-

tion"

.

NO

>> Repair or replace combination meter. Refer to 

MWI-85, "Removal and Installation"

.

BRAKE WARNING LAMP

BRC-123

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

BRAKE WARNING LAMP

Component Function Check

INFOID:0000000006222651

1.

CHECK BRAKE WARNING LAMP FUNCTION (1)

Check that brake warning lamp in combination meter turns ON for approx. 1 second after ignition switch is
turned ON.

CAUTION:

Never start engine.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Proceed to diagnosis procedure. Refer to 

BRC-123, "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-117, "Diagnosis Procedure"

.

3.

CHECK BRAKE WARNING LAMP FUNCTION (3)

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 brake fluid level switch system. Refer to 

BRC-103, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006222652

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-113, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

PERFORM THE SELF-DIAGNOSIS

With CONSULT-III.

Perform self-diagnosis for “ABS”.

Is any DTC detected?

YES

>> Check the DTC. Refer to 

BRC-51, "DTC Index"

.

NO

>> GO TO 3.

3.

CHECK BRAKE WARNING LAMP SIGNAL

With CONSULT-III.

1.

Select “ABS”, “DATA MONITOR” and “EBD WARN LAMP” according to this order.

2.

Turn the ignition switch OFF.

3.

Check that data monitor displays “On” for approx. 1 second after ignition switch is turned ON and then
changes to “Off”.

CAUTION:

Never start engine.

Is the inspection result normal?

BRC-124

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

BRAKE WARNING LAMP

YES

>> GO TO 4.

NO

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

BRC-137, "Removal and Installa-

tion"

.

4.

CHECK COMBINATION METER

Check combination meter. Refer to 

MWI-30, "CONSULT-III Function"

.

Is the inspection result normal?

YES

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

BRC-137, "Removal and Installa-

tion"

.

NO

>> Repair or replace combination meter. Refer to 

MWI-85, "Removal and Installation"

.