Power Window Main Switch

POWER SUPPLY AND GROUND CIRCUIT CHECK (CREW CAB):_: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.




Component Function Check

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 - SEE Diagnosis Procedure.




Diagnosis Procedure
Regarding Wiring Diagram information, Crew Cab.
1. CHECK POWER SUPPLY CIRCUIT





1. Turn ignition switch ON.
2. Check voltage between main power window and door lock/unlock switch connectors (A and B) 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 (A) and main power window and door lock/unlock switch connectors (B and C).






4. Check continuity between BCM connector (A) 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 - 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. Service and Repair.
5. CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH OUTPUT SIGNAL (REAR POWER WINDOW SWITCH LH)





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. Power Window Main Switch.
6. CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH OUTPUT SIGNAL (REAR POWER WINDOW SWITCH RH)





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. 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. SEE Component Inspection.
Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - Replace main power window and door lock/unlock switch. Power Window Main Switch.




Component Inspection
1. CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH





1. Check main power window and door lock/unlock switch.










2. Check continuity between main power window and door lock/unlock switch (power window lock switch). (Lock operation).










3. Check continuity between main power window and door lock/unlock switch (power window lock switch). (Unlock operation).






Is the inspection result normal?
YES - Main power window and door lock/unlock switch is OK.
NO - Replace main power window and door lock/unlock switch. Power Window Main Switch.