Interior Room Lamp Power Supply Circuit

INTERIOR ROOM LAMP POWER SUPPLY CIRCUIT


Diagnosis Procedure

1.CHECK INTERIOR ROOM LAMP POWER SUPPLY OUTPUT
CONSULT-III ACTIVE TEST
1. Turn ignition switch ON.
2. Select "BATTERY SAVER" of BCM (BATTERY SAVER) active test item.
3. While operating the test item, check voltage between BCM harness connector and ground.





Is the measurement value normal?
YES - GO TO 2.
NO - GO TO 3.
2.CHECK INTERIOR ROOM LAMP POWER SUPPLY CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect the following connectors.
- BCM
- Total illumination control unit
- Step lamp (Driver side)
- Step lamp (Passenger side)
- Step lamp (Rear LH)
- Step lamp (Rear RH)
- Luggage room lamp (Luggage side)
- Luggage room lamp (Back door side)
3. Check continuity between BCM harness connector and each interior room lamp harness connector.





Does continuity exist?
YES - Interior room lamp power supply circuit is normal.
NO - Repair the harnesses or connectors.
3.CHECK INTERIOR ROOM LAMP POWER SUPPLY CIRCUIT FOR SHORT
1. Turn ignition switch OFF.
2. Disconnect the following connectors.
- BCM
- Total illumination control unit
- Step lamp (Driver side)
- Step lamp (Passenger side)
- Step lamp (Rear LH)
- Step lamp (Rear RH)
- Luggage room lamp (Luggage side)
- Luggage room lamp (Back door side)
3. Check continuity between BCM harness connector and ground.





Does continuity exist?
YES - Repair the harnesses or connectors.
NO - Replace BCM.