Infiniti QX56 (JA60). Manual — part 750
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PWC-12
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
COMPONENT DIAGNOSIS
POWER SUPPLY AND GROUND CIRCUIT
POWER WINDOW MAIN SWITCH
POWER WINDOW MAIN SWITCH : Description
INFOID:0000000005147171
• BCM supplies power.
• It operates each power window motor via corresponding power window switch and makes window move up/
down when main power window and door lock/unlock switch is operated.
POWER WINDOW MAIN SWITCH : Component Function Check
INFOID:0000000005147172
Main Power Window And Door Lock/Unlock Switch
1.
CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH FUNCTION
Does power window motor operate with main power window and door lock/unlock switch operation?
Is the inspection result normal?
YES
>> Main power window and door lock/unlock switch power supply and ground circuit are OK.
NO
>> Refer to
PWC-12, "POWER WINDOW MAIN SWITCH : Diagnosis Procedure"
POWER WINDOW MAIN SWITCH : Diagnosis Procedure
INFOID:0000000005147173
Regarding Wiring Diagram information, refer to
.
1.
CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between main power window and door lock/
unlock switch connectors and ground.
Is the measurement value within the specification?
YES
>> GO TO 3
NO
>> GO TO 2
2.
CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and main power window and door lock/unlock
switch.
3. Check continuity between BCM connector and main power win-
dow and door lock/unlock switch connectors.
Terminal
Voltage (V)
(Approx.)
(+)
(–)
Main power window and
door lock/unlock switch
connector
Terminal
D7 (A)
10
Ground
Battery voltage
D8 (B)
19
ALKIA0273ZZ
BCM connector
Terminal
Main power window and
door lock/unlock switch
connector
Terminal
Continuity
M20 (A)
68
D7 (B)
10
Yes
69
D8 (C)
19
LIIA2215E
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POWER SUPPLY AND GROUND CIRCUIT
PWC-13
< COMPONENT DIAGNOSIS >
C
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A
B
PWC
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4. Check continuity between BCM connector and ground.
Is the inspection result normal?
YES
>> GO TO 4
NO
>> Repair or replace harness.
3.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch.
3. Check continuity between main power window and door lock/
unlock switch connector and ground.
Is the inspection result normal?
YES
>> Replace main power window and door lock/unlock
switch. Refer to
PWC-117, "Removal and Installation"
.
NO
>> Repair or replace harness.
4.
CHECK BCM OUTPUT SIGNAL
1. Connect BCM.
2. Turn ignition switch ON.
3. Check voltage between BCM connector and ground.
Is the measurement value within the specification?
YES
>> Replace BCM. Refer to
BCS-59, "Removal and Installation"
NO
>> Repair or replace harness.
FRONT POWER WINDOW SWITCH
FRONT POWER WINDOW SWITCH : Description
INFOID:0000000005147174
• BCM supplies power.
• Front power window motor RH will be operated if power window and door lock/unlock switch RH is operated.
FRONT POWER WINDOW SWITCH : Component Function Check
INFOID:0000000005147175
Power Window And Door Lock/Unlock Switch RH
1.
CHECK FRONT POWER WINDOW MOTOR RH FUNCTION
Does front power window motor RH operate with power window and door lock/unlock switch RH operation?
Is the inspection result normal?
YES
>> Power window and door lock/unlock switch RH power supply and ground circuit are OK.
NO
>> Refer to
PWC-14, "FRONT POWER WINDOW SWITCH : Diagnosis Procedure"
BCM connector
Terminal
Ground
Continuity
M20 (A)
68
No
69
Main power window and door lock/
unlock switch connector
Terminal
Ground
Continuity
D8
17
Yes
ALKIA0275ZZ
Terminals
Voltage (V)
(Approx.)
(+)
(–)
BCM connector
Terminal
M20
68
Ground
Battery voltage
69
LIIA0917E
![](/vehicles/zatt/vend/genn/ukirs.png)
PWC-14
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
FRONT POWER WINDOW SWITCH : Diagnosis Procedure
INFOID:0000000005147176
Regarding Wiring Diagram information, refer to
.
1.
CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between power window and door lock/unlock
switch RH connector and ground.
Is the measurement value within the specification?
YES
>> GO TO 3
NO
>> GO TO 2
2.
CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and power window and door lock/unlock switch
RH.
3. Check continuity between BCM connector and power window
and door lock/unlock switch RH connector.
4. Check continuity between BCM connector and ground.
Is the inspection result normal?
YES
>> GO TO 4
NO
>> Repair or replace harness.
3.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect power window and door lock/unlock switch RH.
3. Check continuity between power window and door lock/unlock
switch RH connector and ground.
Is the inspection result normal?
YES
>> Replace power window and door lock/unlock switch RH.
PWC-118, "Removal and Installation"
NO
>> Repair or replace harness.
Terminal
Voltage (V)
(Approx.)
(+)
(–)
Power window and door lock/
unlock
switch RH connector
Terminal
D105
10
Ground
Battery voltage
ALKIA0301ZZ
BCM connector
Terminal
Power window and
door lock/unlock
switch RH connector
Terminal
Continuity
M20 (A)
69
D105 (B)
10
Yes
BCM connector
Terminal
Ground
Continuity
M20 (A)
69
No
LIIA2364E
Power window and door
lock/unlock switch RH
Terminal
Ground
Continuity
D105
11
Yes
ALKIA0303ZZ
![](/vehicles/zatt/vend/genn/wea.png)
POWER SUPPLY AND GROUND CIRCUIT
PWC-15
< COMPONENT DIAGNOSIS >
C
D
E
F
G
H
I
J
L
M
A
B
PWC
N
O
P
4.
CHECK BCM OUTPUT SIGNAL
1. Connect BCM.
2. Turn ignition switch ON.
3. Check voltage between BCM connector and ground.
Is the measurement value within the specification?
YES
>> Replace power window and door lock/unlock switch RH.
PWC-118, "Removal and Installation"
NO
>> Replace BCM. Refer to
BCS-59, "Removal and Installation"
REAR POWER WINDOW SWITCH
REAR POWER WINDOW SWITCH : Description
INFOID:0000000005147177
• BCM supplies power.
• Rear power window motor will be operated if rear power window switch is operated. Rear power window
switch.
REAR POWER WINDOW SWITCH : Component Function Check
INFOID:0000000005147178
Rear Power Window Switch
1.
CHECK REAR POWER WINDOW MOTOR FUNCTION
Does rear power window motor operate with rear power window switch operation?
Is the inspection result normal?
YES
>> Rear power window switch power supply and ground circuit are OK.
NO
>> Refer to
PWC-15, "REAR POWER WINDOW SWITCH : Diagnosis Procedure"
.
REAR POWER WINDOW SWITCH : Diagnosis Procedure
INFOID:0000000005147179
Regarding Wiring Diagram information, refer to
.
1.
CHECK POWER WINDOW POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power window switch LH or RH.
3. Turn ignition switch ON.
4. Check voltage between rear power window switch LH or RH
connector D203 (LH), D303 (RH) terminals 2, 3 and ground.
Is the inspection result normal?
YES
>> GO TO 2
NO
>> Repair or replace harness.
2.
CHECK POWER WINDOW GROUND CIRCUIT
Terminals
Voltage (V)
(Approx.)
(+)
(-)
BCM connector
Terminal
M20
69
Ground
Battery voltage
WIIA0508E
2 - Ground
: Battery voltage
3 - Ground
: Battery voltage
LIIA1348E
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