Diagnosis Procedure

REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT


Description

Heats the heating wire with the power supply from the rear window defogger relay to prevent the rear window from fogging up.




REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT


Diagnosis Procedure

Regarding Wiring Diagram information, Electrical Diagrams.
1. CHECK POWER SUPPLY CIRCUIT





1. Turn ignition switch ON.
2. Check voltage between rear window defogger connector and ground.





Is the inspection result normal?
YES - GO TO 2
NO - GO TO 3
2. CHECK GROUND CIRCUIT





1. Turn ignition switch OFF.
2. Disconnect rear window defogger.
3. Check continuity between rear window defogger connector and ground.





Is the inspection result normal?
YES - GO TO 4
NO - Repair or replace harness.
3. CHECK HARNESS CONTINUITY





1. Disconnect IPDM E/R.
2. Check continuity between rear window defogger connector (A) and IPDM E/R connector (B).





3. Check continuity between rear window defogger connector (A) and ground.





Is the inspection result normal?
YES - GO TO 5
NO - Replace or repair harness.
4. CHECK FILAMENT
Check filament. Filament Check.
Is the inspection result normal?
YES - Intermittent Incident.
NO - Repair filament. Service and Repair.
5. CHECK INTERMITTENT INCIDENT
Check intermittent incident. Intermittent Incident.
Is the inspection result normal?
YES - Check the following.
- Battery power supply circuit.
- IPDM E/R.
NO - Repair or replace the malfunctioning parts.