Diagnosis Procedure

POWER WINDOW SERIAL LINK

POWER WINDOW MAIN SWITCH : Diagnosis Procedure


1. CHECK POWER WINDOW SWITCH INPUT SIGNAL

1.Turn ignition switch OFF.
2.Disconnect power window main switch connector.
3.Check signal between power window main switch harness connector and ground with oscilloscope when door lock and unlock switch (driver side and passenger side) is turned to "LOCK" or "UNLOCK".
4.Check that signals which are shown in the figure below can be detected during 10 seconds just after door lock and unlock switch (driver side and passenger side) is turned to "LOCK" or "UNLOCK".





Is the inspection result normal?
YES- Replace power window main switch. Power Window Main Switch.
NO- GO TO 2.

2. CHECK POWER WINDOW SERIAL LINK CIRCUIT

1.Disconnect BCM connector.
2.Check continuity between BCM harness connector and power window main switch harness connector.





3.Check continuity between BCM harness connector and ground.





Is the inspection result normal?
YES- Replace BCM. Exploded View.
NO- Repair or replace harness.