Diagnosis Procedure
- CHECK ENCODER SIGNAL
- Turn ignition switch ON.
- Check signal between main power window and door lock/unlock switch harness connector and ground with oscilloscope.
Signal name
(+)
(-)
Signal
(Reference value)
Main power window and door lock/unlock switch
Connector
Terminal
Encoder signal 1
D7
5
Ground
Refer to following signals
Encoder signal 2
4
Is the inspection result normal?
YES
Replace main power window and door lock/unlock switch. Refer to Removal and Installation .
NO
GO TO 2.
- CHECK ENCODER SIGNAL CIRCUIT
- Turn ignition switch OFF.
- Disconnect main power window and door lock/unlock switch connector and front power window motor LH connector.
- Check continuity between main power window and door lock/unlock switch harness connector and front power window motor LH harness connector.
Main power window and door lock/unlock switch
Front power window motor LH
Continuity
Connector
Terminal
Connector
Terminal
D7
4
D9
5
Yes
5
3
- Check continuity between main power window and door lock/unlock switch harness connector and ground.
Main power window and door lock/unlock switch
Ground
Continuity
Connector
Terminal
D7
4
No
5
Is the inspection result normal?
YES
GO TO 3.
NO
Repair or replace harness.
- CHECK ENCODER POWER SUPPLY
- Connect main power window and door lock/unlock switch connector.
- Turn ignition switch ON.
- Check voltage between front power window motor LH harness connector and ground.
(+)
(-)
Voltage
(Approx.)
Front power window motor LH
Connector
Terminal
D9
4
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 5.
NO
GO TO 4.
- CHECK ENCODER POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect main power window and door lock/unlock switch connector.
- Check continuity between main power window and door lock/unlock switch harness connector and front power window motor LH harness connector.
Main power window and door lock/unlock switch
Front power window motor LH
Continuity
Connector
Terminal
Connector
Terminal
D7
14
D9
4
Yes
- Check continuity between main power window and door lock/unlock switch harness connector and ground.
Main power window and door lock/unlock switch
Ground
Continuity
Connector
Terminal
D7
14
No
Is the inspection result normal?
YES
Replace main power window and door lock/unlock switch. Refer to Removal and Installation .
NO
Repair or replace harness.
- CHECK GROUND CIRCUIT 1
- Turn ignition switch OFF.
- Check continuity between front power window motor LH harness connector and ground.
Front power window motor LH
Ground
Continuity
Connector
Terminal
D9
6
Yes
Is the inspection result normal?
YES
Replace front power window motor LH. Refer to Removal and Installation .
NO
GO TO 6.
- CHECK GROUND CIRCUIT 2
- Disconnect main power window and door lock/unlock switch connector.
- Check continuity between main power window and door lock/unlock switch harness connector and front power window motor LH harness connector.
Main power window and door lock/unlock switch
Front power window motor LH
Continuity
Connector
Terminal
Connector
Terminal
D7
12
D9
6
Yes
- Check continuity between main power window and door lock/unlock switch harness connector and ground.
Main power window and door lock/unlock switch
Ground
Continuity
Connector
Terminal
D7
12
No
Is the inspection result normal?
YES
Replace main power window and door lock/unlock switch. Refer to Removal and Installation .
NO
Repair or replace harness.