Roadster

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.





INTERIOR ROOM LAMP POWER SUPPLY CIRCUIT


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
- Cargo area courtesy light
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.