Interior Room Lamp Power Supply Circuit

INTERIOR ROOM LAMP POWER SUPPLY CIRCUIT





Description
Provides the interior room lamp power supply. Also cuts the power supply when the interior room lamp battery saver activating.




Component Function Check
1.CHECK INTERIOR ROOM LAMP POWER SUPPLY FUNCTION
CONSULT-III ACTIVE TEST
1. Turn the ignition switch ON.
2. Turn each interior room lamp ON.
- Map lamp
- Step lamp
- Vanity mirror lamp
- Trunk room lamp
3. Select "BATTERY SAVER" of BCM (BATTERY SAVER) active test item.
4. With operating the test items, check that each interior room lamp turns ON/OFF.

Off : Interior room lamp OFF
On : Interior room lamp ON

Does the interior room lamp turn ON/OFF?
YES - Interior room lamp power supply circuit is normal.
NO - SEE Diagnosis Procedure.




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





Is the measurement value normal?
YES - GO TO 2.
NO - Replace BCM.
2.CHECK INTERIOR ROOM LAMP POWER SUPPLY OPEN CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the following connectors.
- Map lamp
- Vanity mirror lamp (LH)
- Vanity mirror lamp (RH)
- Trunk room lamp
- Step lamp (driver side)
- Step lamp (passenger side)
3. Check continuity between BCM harness connector and each interior room lamp harness connector.





Does continuity exist?
YES - GO TO 3.
NO - Repair the harnesses or connectors.
3.CHECK INTERIOR ROOM LAMP POWER SUPPLY SHORT CIRCUIT
Check continuity between BCM harness connector and the ground.





Does continuity exist?
YES - Repair the harnesses or connectors.
NO - Check that each interior room lamp has no internal short circuit.