Infiniti QX56 (JA60). Manual - part 750

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 

PWC-53, "Wiring Diagram"

.

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

POWER SUPPLY AND GROUND CIRCUIT

PWC-13

< COMPONENT DIAGNOSIS >

C

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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

PWC-14

< COMPONENT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

FRONT POWER WINDOW SWITCH : Diagnosis Procedure

INFOID:0000000005147176

Regarding Wiring Diagram information, refer to 

PWC-68, "Wiring Diagram"

.

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.

Refer to 

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

POWER SUPPLY AND GROUND CIRCUIT

PWC-15

< COMPONENT DIAGNOSIS >

C

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E

F

G

H

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B

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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.

Refer to 

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 

PWC-53, "Wiring Diagram"

.

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