Diagnosis Procedure

POWER WINDOW SERIAL LINK


FRONT POWER WINDOW SWITCH : Description

Main power window and door lock/unlock switch, power window and door lock/unlock switch RH and BCM transmit and receive the signal by power window serial link.
The signal mentioned below is transmitted from BCM to main power window and door lock/unlock switch and power window and door lock/unlock switch RH
- Keyless power window down signal
The signal mentioned below is transmitted from main power window and door lock/unlock switch to power window and door lock/unlock switch RH
- Front door window RH operation signal
- Power window control by key cylinder switch signal
- Retained power operation signal
- Power window lock switch signal




POWER WINDOW SERIAL LINK


FRONT POWER WINDOW SWITCH : Diagnosis Procedure

Regarding Wiring Diagram information, Front Power Window Switch.
1. CHECK POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH RH





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





4. Check continuity between BCM connector and ground.





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