Diagnosis Procedure

REAR WINDOW DEFOGGER


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


Diagnosis Procedure

1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check the following.
- 20A fuse [No.14, located in fuse block (J/B)]
- 20A fuse [No.15, located in fuse block (J/B)]
Is the inspection result normal?
YES - GO TO 2.
NO - Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between rear window defogger harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 4.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear window defogger connector.
3. Check continuity between rear window defogger harness connector and ground.





Is the inspection result normal?
YES - GO TO 9.
NO - Repair or replace harness between rear window defogger and ground.
4.CHECK REAR WINDOW DEFOGGER CIRCUIT 1
1. Turn ignition switch OFF.
2. Disconnect condenser connector.
3. Check continuity between condenser harness connector and rear window defogger harness connector.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace harness between condenser and rear window defogger.
5.CHECK REAR WINDOW DEFOGGER CIRCUIT 2
1. Disconnect fuse block (J/B) connector.
2. Check continuity between fuse block (J/B) harness connector and condenser harness connector.





Is the inspection result normal?
YES - GO TO 6.
NO - Repair or replace harness between fuse block (J/B) and condenser.
6.CHECK FUSE BLOCK (J/B)
1. Turn ignition switch ON.
2. Check voltage between fuse block (J/B) (fuse block side) and ground.





Is the inspection result normal?
YES - GO TO 7.
NO - GO TO 8.
7.CHECK CONDENSER
Check condenser. Refer to Component Inspection
Is the inspection result normal?
YES - GO TO 10.
NO - Replace condenser.
8.CHECK REAR WINDOW DEFOGGER RELAY
Check rear window defogger relay. Refer to Component Inspection
Is the inspection result normal?
YES - Replace fuse block (J/B)
NO - Replace rear window defogger relay.
9.CHECK FILAMENT
Check the filament for damage or blown. Refer to Filament
Is the inspection result normal?
YES - GO TO 10.
NO - Repair filament.
10.CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to Intermittent Incident
- INSPECTION END