Encoder Circuit Inspection

POWER WINDOW SYSTEM


Encoder Circuit Inspection

1.CHECK FRONT POWER WINDOW MOTOR LH POWER SUPPLY





1. Turn ignition switch OFF.
2. Disconnect front power window motor LH.
3. Turn ignition switch ON.
4. Check voltage between front power window motor LH connector
D9 terminal 1 and ground.





OK or NG
OK - GO TO 3.
NG - GO TO 2.
2.CHECK HARNESS CONTINUITY





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






4. Check continuity between front power window motor LH connector and ground.





OK or NG
OK - Replace main power window and door lock/unlock switch. Service and Repair .
NG - Repair or replace harness.
3.CHECK ENCODER GROUND





1. Turn ignition switch OFF.
2. Check continuity between front power window motor LH connector D9 terminal 6 and ground.





OK or NG
OK - GO TO 5.
NG - GO TO 4.
4.CHECK ENCODER GROUND CIRCUIT





1. Disconnect main power window and door lock/unlock switch.
2. Check continuity between front power window motor LH connector D9 terminal 6 and main power window and door lock/unlock switch connector D7 terminal 2.





OK or NG
OK - Replace main power window and door lock/unlock switch. Service and Repair .
NG - Repair or replace harness.
5.CHECK ENCODER PULSE A SIGNAL





1. Connect front power window motor LH.
2. Turn ignition switch ON.
3. Check the signal between main power window and door lock/unlock switch connector and ground with oscilloscope.






OK or NG
OK - Replace main power window and door lock/unlock switch. Service and Repair .
NG - GO TO 6.
6.CHECK ENCODER PULSE B SIGNAL





Check the signal between main power window and door lock/unlock switch connector and ground with oscilloscope.





OK or NG
OK - Replace main power window and door lock/unlock switch. Service and Repair .
NG - GO TO 7.
7.CHECK ENCODER CIRCUIT





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






4. Check continuity between front power window motor LH connector and ground.





OK or NG
OK - Replace front power window motor LH. Removal and Installation .
NG - Repair or replace harness.