Power Supply and Ground Circuit Check [Rear Power Window Switch]

Power Supply and Ground Circuit Check [Rear Power Window Switch]

Description

- BCM supplies power.
- Rear power window motor will be operated if rear power window switch is operated.

Component Function Check

Rear Power Window Switch

1. CHECK REAR POWER WINDOW MOTOR FUNCTION

Check rear power window motor operation with rear power window switch.

Is the inspection result normal?
YES
Rear power window switch power supply and ground circuit are OK.
NO
Refer to "Diagnosis Procedure".

Diagnosis Procedure

Regarding Wiring Diagram information, refer to [Power Window System: Wiring Diagram [Crew Cab] Power Window System [Crew Cab] ].

1. CHECK POWER SUPPLY CIRCUIT

1 Turn ignition switch ON.





2 Check voltage between rear power window switch connector and ground.






Is the measurement value within the specification?
YES
GO TO 2 (Rear power window switch LH)
YES
GO TO 3 (Rear power window switch RH)
NO
ERROR! Unknown action!GO TO 4

2. CHECK HARNESS CONTINUITY (REAR POWER WINDOW SWITCH LH)

1 Turn ignition switch OFF.





2 Disconnect main power window and door lock/unlock switch and rear power window switch LH.
3 Check continuity between main power window and door lock/unlock switch connector (A) and rear power window switch LH connector (B).






4 Check continuity between main power window and door lock/unlock switch connector (A) and ground.






Is the inspection result normal?
YES
GO TO 5
NO
Repair or replace harness.

3. CHECK HARNESS CONTINUITY (REAR POWER WINDOW SWITCH RH)

1 Turn ignition switch OFF.





2 Disconnect main power window and door lock/unlock switch and rear power window switch RH.
3 Check continuity between main power window and door lock/unlock switch connector (A) and rear power window switch RH connector (B).






4 Check continuity between main power window and door lock/unlock switch connector (A) and ground.






Is the inspection result normal?
YES
GO TO 5
NO
Repair or replace harness.

4. CHECK HARNESS CONTINUITY

1 Disconnect BCM and rear power window switch.





2 Check continuity between BCM connector (A) and rear power window switch connector (B).






3 Check continuity between BCM connector (A) and ground.






Is the inspection result normal?
YES
Replace BCM. Refer to [BCM: Removal and Installation] Removal and Replacement.
NO
Repair or replace harness.

5. CHECK REAR POWER WINDOW SWITCH

Check rear power window switch.

Refer to "Component Inspection".

Is the inspection result normal?
YES
Check intermittent incident. Refer to [Service Information for Electrical Incident: Intermittent Incident] Service Information for Electrical Incident: Intermittent Incident.
NO
Replace rear power window switch. Refer to [Rear Power Window Switch: Removal and Installation - Rear Door Switch (If Equipped)] Rear Power Window Switch - Rear Door Switch (If Equipped).

Component Inspection

Component Inspection

1. CHECK REAR POWER WINDOW SWITCH

Check rear power window switch.






Is the inspection result normal?
YES
Rear power window switch is OK.
NO
Replace rear power window switch. Refer to [Rear Power Window Switch: Removal and Installation - Rear Door Switch (If Equipped)] Rear Power Window Switch - Rear Door Switch (If Equipped).