Diagnosis Procedure

POWER WINDOW SERIAL LINK

POWER WINDOW MAIN SWITCH : Diagnosis Procedure

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

1. CHECK POWER WINDOW SWITCH OUTPUT SIGNAL






1.Remove Intelligent Key, and close 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 main power window and door lock/unlock switch connector D7.
3.Check continuity between BCM connector M18 (A) terminal 40
and main power window and door lock/unlock switch connector
D7 (B) terminal 14.





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.