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, refer to Coupe or Sedan.
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 5
NO - Repair or replace harness.
3. CHECK HARNESS CONTINUITY 1





1. Turn ignition switch OFF.
2. Disconnect condenser and rear window defogger.
3. Check continuity between condenser connector (A) and rear window defogger connector (B).





Is the inspection result normal?
YES - GO TO 4
NO - Replace condenser. Refer to Removal and Installation - Coupe or Removal and Installation - Sedan.
4. CHECK HARNESS CONTINUITY 2





1. Disconnect fuse block (J/B).
2. Check continuity between fuse block (J/B) connector (A) and condenser connector (B).





Is the inspection result normal?
YES - GO TO 6
NO - Replace or repair harness.
5. CHECK FILAMENT
Check filament. Refer to Component Inspection.
Is the inspection result normal?
YES - Refer to Intermittent Incident.
NO - Repair filament. Refer to Filament.
6. 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.