Check Rear Window Defogger Power Supply Circuit

REAR WINDOW DEFOGGER


Check Rear Window Defogger Power Supply Circuit

1.CHECK FUSE
- Check 10A fuse [No.12, located in the fuse block (J/B)]
- Check 20A fuse (No.75, located in the IPDM E/R)
- Check 20A fuse (No.80, located in the IPDM E/R)

NOTE:
Refer to Locations.
OK or NG
OK - GO TO 2.
NG - If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse, refer to PG-4.
2.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Remove rear window defogger relay.
3. Turn ignition switch ON.
4. Check voltage between rear window defogger relay connector and ground.










OK or NG
OK - GO TO 3.
NG - Repair or replace harness between fuse block (J/B) and rear window defogger relay.
3.CHECK REAR WINDOW DEFOGGER RELAY
Check rear window defogger relay.










OK or NG
OK - GO TO 4.
NG - Replace rear window defogger relay.
4.CHECK REAR WINDOW DEFOGGER RELAY GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Install rear window defogger relay.
3. Turn ignition switch ON.
4. Check voltage between IPDM E/R connector and ground.










OK or NG
OK - Rear window defogger power supply circuit is OK.
NG - GO TO 5.
5.CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and rear window defogger relay.
3. Check continuity between IPDM E/R connector and rear window defogger relay connector.










OK or NG
OK - GO TO 6.
NG - Repair or replace harness.
6.CHECK REAR WINDOW DEFOGGER RELAY OUTPUT SIGNAL
1. Connect IPDM E/R connector and rear window defogger relay.
2. Turn ignition switch ON.
3. Check voltage between IPDM E/R connector and ground.










OK or NG
OK - Check condition of harness and connector.
NG - Replace IPDM E/R.