Rear Window Defogger

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.




Component Function Check
1.CHECK REAR WINDOW DEFOGGER
1. Perform Active Test ("REAR DEFOGGER") with CONSULT-III.
2. Touch "ON".
3. Check that the rear window heating wire is getting warmer.
Is the inspection result normal?
YES - Rear window defogger is OK.
NO - SEE Diagnosis Procedure




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 7.
NO - Repair or replace harness between rear window defogger and ground.
4.CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuse block (J/B) connector and rear window defogger connector.
3. Check continuity between fuse block (J/B) harness connector and rear window defogger harness connector.





4. Check continuity between fuse block (J/B) harness connector and ground.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace harness.
5.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 8.
NO - GO TO 6.
6.CHECK REAR WINDOW DEFOGGER RELAY
Check rear window defogger relay. Rear Window Defogger Relay
Is the inspection result normal?
YES - Replace fuse block (J/B)
NO - Replace rear window defogger relay.
7.CHECK FILAMENT
Check the filament for damage or blown. Filament.
Is the inspection result normal?
YES - GO TO 8.
NO - Repair filament.
8.CHECK INTERMITTENT INCIDENT
Intermittent Incident
- INSPECTION END