Diagnosis Procedure

REAR WINDOW DEFOGGER RELAY


Description

Power is supplied to the rear window defogger with BCM control.




REAR WINDOW DEFOGGER RELAY


Diagnosis Procedure

1. CHECK REAR WINDOW DEFOGGER RELAY GROUND CIRCUIT





1. Turn ignition switch ON.
2. Check voltage between BCM connector and ground.





Is the inspection result normal?
YES - Rear window defogger power supply circuit is OK.
NO - GO TO 2
2. CHECK HARNESS CONTINUITY





1. Turn ignition switch OFF.
2. Disconnect BCM and fuse block (J/B).
3. Check continuity between BCM connector (A) and fuse block (J/B) connector (B).





Is the inspection result normal?
YES - GO TO 3
NO - Repair or replace harness.
3. CHECK REAR WINDOW DEFOGGER RELAY
Check rear window defogger relay. Refer to Component Inspection.
Is the inspection result normal?
YES - GO TO 4
NO - Replace rear window defogger relay.
4. CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to Intermittent Incident.
Is the inspection result normal?
YES - Check the following.
- Battery power supply circuit.
- Fuse block (J/B).
NO - Repair or replace the malfunctioning parts.