Diagnosis Procedure

REAR WINDOW DEFOGGER SWITCH


WITHOUT NAVIGATION : Description

- The rear window defogger is operated by turning the rear window defogger switch ON.
- The indicator lamp in the rear window defogger illuminates when the rear window defogger is operating.




REAR WINDOW DEFOGGER SWITCH


WITHOUT NAVIGATION : Diagnosis Procedure

1.CHECK A/C CONTROLLER (REAR WINDOW DEFOGGER SWITCH)
Check A/C control system. Refer to Without 7 Inch Display.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace the malfunctioning parts.
2.CHECK BCM OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Turn ignition switch ON.
4. Check signal between A/C auto amp. harness connector and ground with oscilloscope.





Is the inspection result normal?
YES - Replace A/C auto amp. Refer to Removal And Installation.
NO - GO TO 3.
3.CHECK REAR WINDOW DEFOGGER SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between BCM harness connector and A/C auto amp. connector.





4. Check continuity between BCM harness connector and ground.





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