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-
.
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-
.
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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