Diagnosis Procedure

POWER WINDOW SERIAL LINK

FRONT POWER WINDOW SWITCH : Diagnosis Procedure

Regarding Wiring Diagram information, [1][2]Electrical Diagrams.

1. CHECK POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH RH






1.Remove Intelligent Key, and close the front door LH and RH.
2.Check signal between BCM connector M18 terminal 40 and ground with oscilloscope when door lock and unlock switch (key cylinder switch) is turned to "LOCK" or "UNLOCK".
3.Check that signals which are shown in the figure below can be detected during 10 seconds just after door lock and unlock switch (key cylinder switch) is turned to "LOCK" or "UNLOCK".





Is the inspection result normal?
YES- Power window serial link is OK.
NO- GO TO 2

2. CHECK POWER WINDOW SERIAL LINK CIRCUIT






1.Turn ignition switch OFF.
2.Disconnect BCM connector M18 and power window and door lock/unlock switch RH connector.
3.Check continuity between BCM connector M18 (A) terminal 40
and power window and door lock/unlock switch RH connector
D105 (B) terminal 16.





4.Check continuity between BCM connector M18 (A) terminal 40 and ground.





Is the inspection result normal?
YES- Replace main power window and door lock/unlock switch. Main Power Window And Door Lock/Unlock Switch.
NO- Repair or replace harness or connectors.