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


Main Power Window And Door Lock/Unlock Switch Power Supply Circuit Check
1. CHECK POWER SUPPLY CIRCUIT





1. Turn ignition switch ON.
2. Check voltage between main power window and door lock/unlock switch connector D7 terminal 5 and ground.

5 - Ground : Battery voltage

Is the measurement value within the specification?
YES - GO TO 2
NO - GO TO 3
2. 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 D7 terminal 14 and ground.





Is the inspection result normal?
YES - GO TO 4
NO - Repair or replace harness.
3. CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH POWER SUPPLY CIRCUIT





1. Turn ignition switch OFF.
2. Disconnect BCM and main power window and door lock/unlock switch.
3. Check continuity between BCM and main power window and door lock/unlock switch.





4. Check continuity between BCM and ground.





Is the inspection result normal?
YES - Replace main power window and door lock/unlock switch. Refer to 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 M20 terminal 68 and ground.

68 - Ground : Battery voltage

Is the measurement value within the specification?
YES - Check main power window and door lock/unlock switch output signal (rear power window switch LH) GO TO 5
YES - Check main power window and door lock/unlock switch output signal (rear power window switch RH) GO TO 6
NO - Replace BCM. Refer to Service and Repair.
5. CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH OUTPUT SIGNAL (REAR POWER WINDOW SWITCH LH)





1. Turn ignition switch ON.
2. Check voltage between main power window and door lock/unlock switch connector and ground.





Is the measurement value within the specification?
YES - GO TO 7
NO - Replace main power window and door lock/unlock switch. Refer to Power Window Main Switch.
6. CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH OUTPUT SIGNAL (REAR POWER WINDOW SWITCH RH)





1. Turn ignition switch ON.
2. Check voltage between main power window and door lock/unlock switch connector and ground.





Is the measurement value within the specification?
YES - GO TO 8
NO - Replace main power window and door lock/unlock switch. Refer to Power Window Main Switch.
7. CHECK HARNESS CONTINUITY (REAR POWER WINDOW SWITCH LH)





1. Turn ignition switch OFF.
2. Disconnect rear power window switch LH.
3. Check continuity between main power window and door lock/unlock switch connector and rear power window switch LH connector.





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





Is the inspection result normal?
YES - GO TO 9
NO - Repair or replace harness.
8. CHECK HARNESS CONTINUITY (REAR POWER WINDOW SWITCH RH)





1. Turn ignition switch OFF.
2. Disconnect rear power window switch RH.
3. Check continuity between main power window and door lock/unlock switch connector and rear power window switch RH connector.





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





Is the inspection result normal?
YES - GO TO 9
NO - Repair or replace harness.
9. CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH
Check main power window and door lock/unlock switch. Refer to Component Inspection.
Is the inspection result normal?
YES - Check intermittent incident. Refer to Intermittent Incident.
NO - Replace main power window and door lock/unlock switch. Refer to Power Window Main Switch.