Diagnosis Procedure

POWER WINDOW SERIAL LINK


POWER WINDOW MAIN 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 MAIN SWITCH : Diagnosis Procedure

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





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





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





4. Check continuity between BCM connector and ground.





Is the inspection result normal?
YES - Replace BCM. Removal And Installation.
NO - Repair or replace harness.
4.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
- INSPECTION END