Diagnosis Procedure
- CHECK ENCODER SIGNAL
- Turn ignition switch ON.
- Check signal between power window main switch harness connector and ground with oscilloscope.
(+)
(-)
Signal
(Reference value)
Power window main switch
Connector
Terminal
D9
4
Ground
Refer to following signal
5
Is the inspection result normal?
YES
Replace power window main switch. Refer to POWER WINDOW MAIN SWITCH : Removal & Installation .
NO
GO TO 2.
- CHECK ENCODER SIGNAL CIRCUIT
- Turn ignition switch OFF.
- Disconnect power window main switch connector and front power window motor (driver side) connector.
- Check continuity between power window main switch harness connector and front power window motor (driver side) harness connector.
Power window main switch
Front power window motor (driver side)
Continuity
Connector
Terminal
Connector
Terminal
D9
4
D8
3
Existed
5
5
- Check continuity between power window main switch harness connector and ground.
Power window main switch
--
Continuity
Connector
Terminal
D9
4
Ground
Not existed
5
Is the inspection result normal?
YES
GO TO 3.
NO
Repair or replace harness.
- CHECK ENCODER POWER SUPPLY
- Connect power window main switch connector.
- Turn ignition switch ON.
- Check voltage between front power window motor (driver side) harness connector and ground.
(+)
(-)
Voltage
Front power window motor (driver side)
Connector
Terminal
D8
4
Ground
9 - 16 V
Is the inspection result normal?
YES
GO TO 5.
NO
GO TO 4.
- CHECK ENCODER POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect power window main switch connector.
- Check continuity between power window main switch harness connector and front power window motor (driver side) harness connector.
Power window main switch
Front power window motor (driver side)
Continuity
Connector
Terminal
Connector
Terminal
D9
14
D8
4
Existed
- Check continuity between power window main switch harness connector and ground.
Power window main switch
--
Continuity
Connector
Terminal
D9
14
Ground
Not existed
Is the inspection result normal?
YES
Replace power window main switch. Refer to POWER WINDOW MAIN SWITCH : Removal & Installation .
NO
Repair or replace harness.
- CHECK ENCODER GROUND CIRCUIT 1
- Turn ignition switch OFF.
- Disconnect power window main switch connector.
- Check continuity between power window main switch harness connector and front power window motor (driver side) harness connector.
Power window main switch
Front power window motor (driver side)
Continuity
Connector
Terminal
Connector
Terminal
D9
12
D8
6
Existed
Is the inspection result normal?
YES
GO TO 6.
NO
Repair or replace harness.
- CHECK ENCODER GROUND CIRCUIT 2
- Connect power window main switch connector.
- Check continuity between power window main switch connector and ground.
Power window main switch
--
Continuity
Connector
Terminal
D9
12
Ground
Existed
Is the inspection result normal?
YES
Replace front power window motor (driver side). Refer to FRONT DOOR REGULATOR : Removal & Installation .
NO
Replace power window main switch. Refer to POWER WINDOW MAIN SWITCH : Removal & Installation .