Diagnosis Procedure

POWER SUPPLY AND GROUND CIRCUIT


POWER WINDOW MAIN SWITCH : Description

- 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 SUPPLY AND GROUND CIRCUIT


POWER WINDOW MAIN SWITCH : Diagnosis Procedure

Regarding Wiring Diagram information, Power Window Main Switch.
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 window and door lock/unlock switch connectors.





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. Power Window Main Switch.
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. Service and Repair.
NO - Repair or replace harness.