Infiniti QX56 (Z62). Manual - part 158

 

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Infiniti QX56 (Z62). Manual - part 158

 

 

PARKING BRAKE SWITCH

BRC-117

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

PARKING BRAKE SWITCH

Component Function Check

INFOID:0000000006222643

1.

CHECK PARKING BRAKE SWITCH OPERATION

Check that brake warning lamp in combination meter turns ON/OFF when parking brake is operated.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to diagnosis procedure. Refer to 

BRC-117, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006222644

1.

CHECK PARKING BRAKE SWITCH CIRCUIT

1.

Turn the ignition 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 parking brake switch. Refer to 

BRC-118, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace parking brake switch. Refer to 

PB-5, "Removal and Installation"

.

3.

CHECK PARKING BRAKE SWITCH SIGNAL

With CONSULT-III.

1.

Connect parking brake switch harness connector.

2.

Connect combination meter harness connector.

3.

Select “ABS”, “DATA MONITOR” and “PARK BRAKE SW” according to this order. Check parking brake
switch signal.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 4.

4.

CHECK COMBINATION METER

Check combination meter. Refer to 

MWI-30, "CONSULT-III Function"

.

Parking brake switch

Combination meter

Continuity

Connector

Terminal

Connector

Terminal

M11

1

M34

26

Existed

Parking brake switch

Continuity

Connector

Terminal

M11

1

Ground

Not existed

Condition

DATA MONITOR

Operate parking brake

On

Release the parking brake

Off

BRC-118

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

PARKING BRAKE SWITCH

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace combination meter. Refer to 

MWI-85, "Removal and Installation"

.

5.

CHECK TERMINAL

• Check combination meter pin terminals for damage or loose connection with harness connector.
• Check parking brake 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-137, "Removal and Installa-

tion"

.

NO

>> Repair or replace error-detected parts.

Component Inspection

INFOID:0000000006222645

1.

CHECK PARKING BRAKE SWITCH

1.

Turn the ignition switch OFF.

2.

Disconnect parking brake switch harness connector.

3.

Check continuity between parking brake switch terminal and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace parking brake switch. Refer to 

PB-5, "Removal and Installation"

.

Parking brake switch

Condition

Continuity

Terminal

1

Ground

When parking brake switch is pressed

Existed

When parking brake switch is released

Not existed

VDC OFF SWITCH

BRC-119

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

VDC OFF SWITCH

Component Function Check

INFOID:0000000006222646

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-119, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006222647

NOTE:
VDC OFF switch is integrated in SNOW MODE / TOW MODE / VDC OFF switch assembly (2WD models) or
4WD switch assembly (4WD models).

1.

CHECK VDC OFF SWITCH CIRCUIT

1.

Turn the ignition switch OFF.

2.

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

3.

Disconnect SNOW MODE / TOW MODE / VDC OFF switch assembly (2WD models) or 4WD switch
assembly (4WD models) harness connector.

4.

Check continuity between ABS actuator and electric unit (control unit) harness connector and SNOW
MODE / TOW MODE / VDC OFF switch assembly (2WD models) or 4WD switch assembly (4WD models)
harness connector.

*1: SNOW MODE / TOW MODE / VDC OFF switch assembly (2WD models)
*2: 4WD switch assembly (4WD models)

5.

Check continuity between ABS actuator and electric unit (control unit) harness connector terminal 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 continuity between SNOW MODE / TOW MODE / VDC OFF switch assembly (2WD models) or 4WD
switch assembly (4WD models) harness connector terminal and ground.

*1: SNOW MODE / TOW MODE / VDC OFF switch assembly (2WD models)
*2: 4WD switch assembly (4WD models)

ABS actuator and electric unit (control unit)

SNOW MODE / TOW MODE / VDC OFF 

switch assembly (2WD models) or 4WD 

switch assembly (4WD models)

Continuity

Connector

Terminal

Connector

Terminal

E36

39

M147

*1

M54

*2

1

Existed

ABS actuator and electric unit (control unit)

Continuity

Connector

Terminal

E36

39

Ground

Not existed

SNOW MODE / TOW MODE / VDC 

OFF switch assembly (2WD models) or 

4WD switch assembly (4WD models)

Continuity

Connector

Terminal

M147

*1

M54

*2

20

Ground

Existed

BRC-120

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

VDC OFF SWITCH

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK VDC OFF SWITCH

Check VDC OFF switch. Refer to 

BRC-120, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace VDC OFF switch. Refer to 

BRC-140, "Removal and Installation"

.

4.

CHECK VDC OFF SWITCH SIGNAL

With CONSULT-III.

1.

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

2.

Connect SNOW MODE / TOW MODE / VDC OFF switch assembly (2WD models) or 4WD switch assem-
bly (4WD models) harness connector.

3.

Select “ABS”, “DATA MONITOR” and “OFF SW” according to this order. Check VDC OFF switch signal.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 5.

5.

CHECK TERMINAL

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

ness connector.

• Check SNOW MODE / TOW MODE / VDC OFF switch assembly (2WD models) or 4WD switch assembly

(4WD models) 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-137, "Removal and Installa-

tion"

.

NO

>> Repair or replace error-detected parts.

Component Inspection

INFOID:0000000006222648

NOTE:
VDC OFF switch is integrated in SNOW MODE / TOW MODE / VDC OFF switch assembly (2WD models) or
4WD switch assembly (4WD models).

1.

CHECK VDC OFF SWITCH

1.

Turn the ignition switch OFF.

2.

Disconnect SNOW MODE / TOW MODE / VDC OFF switch assembly (2WD models) or 4WD switch
assembly (4WD models) harness connector.

3.

Check continuity between terminals of SNOW MODE / TOW MODE / VDC OFF switch assembly (2WD
models) or 4WD switch assembly (4WD models) connector.

Is the inspection result normal?

YES

>> INSPECTION END

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

SNOW MODE / TOW MODE / VDC OFF 

switch assembly (2WD models) or 4WD 

switch assembly (4WD models)

Condition

Continuity

Terminal

1 – 20

When VDC OFF switch is pressed

Existed

When VDC OFF switch is not pressed

Not existed

 

 

 

 

 

 

 

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