Diagnosis Procedure

POWER WINDOW SERIAL LINK


POWER WINDOW SUB-SWITCH POWER WINDOW SUB-SWITCH : Description

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




POWER WINDOW SERIAL LINK


POWER WINDOW SUB-SWITCH : Diagnosis Procedure

1.CHECK POWER WINDOW SWITCH OUTPUT SIGNAL
1. Turn ignition switch ON.
2. Check signal between power window sub-switch harness connector and ground.





Is the inspection result normal?
YES - Replace power window sub-switch. Refer to Service and Repair.
NO - GO TO 2.
2.CHECK POWER WINDOW SERIAL LINK SIGNAL
1. Turn ignition switch OFF.
2. Disconnect power window sub-switch connector.
3. Turn ignition switch ON.
4. Check voltage between power window sub-switch harness connector and ground.





Is the inspection result normal?
YES - Replace power window main switch. Refer to Service and Repair.
NO - GO TO 3.
3.CHECK POWER WINDOW SERIAL LINK CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and power window sub-switch connector.
3. Check continuity between BCM connector and power window sub-switch connector.





4. Check continuity between BCM connector and ground.





Is the inspection result normal?
YES - Replace BCM. Refer to Removal And Installation.
NO - Repair or replace harness.