Battery Saver Output/Power Supply Circuit

BATTERY SAVER OUTPUT/POWER SUPPLY CIRCUIT

Description

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


Component Function Check


1. CHECK BATTERY SAVER OUTPUT/POWER SUPPLY FUNCTION

CONSULT
1.Turn ignition switch ON.
2.Turn each interior room lamp ON.
-Front room/map lamps
-Personal lamps rear
-Front step lamps
-Vanity mirror lamps (if equipped)
-Trunk room lamp
3.Open the driver door to turn ON the front step lamps.
4.Select BATTERY SAVER of BCM (BATTERY SAVER) active test item.
5. While operating the test item, check that each interior room lamp turn ON/OFF.

OFF: Interior room lamp OFF
ON: Interior room lamp ON

Is the inspection result normal?
YES- Interior room lamp power supply circuit is normal.
NO- Refer to "Diagnosis Procedure" .


Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" Interior Room Lamp.

1. CHECK BATTERY SAVER OUTPUT/POWER SUPPLY OUTPUT

CONSULT
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 connector M21 terminal 129 and ground.





Is the inspection result normal?
YES- GO TO 2.
NO- Replace BCM after making sure battery saver output/power supply circuit is not shorted to voltage. Refer to "Removal and Installation" Service and Repair.

2. CHECK BATTERY SAVER OUTPUT/POWER SUPPLY OPEN CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect the following connectors.
- BCM M21
-Front step lamp LH D11
-Front step lamp RH D109
-Front room/map lamp assembly R51
-Vanity mirror lamp LH (if equipped) R3
-Vanity mirror lamp RH (if equipped) R9
-Trunk room lamp B36
-Personal lamp rear R50
3.Check continuity between BCM connector M21 terminal 129 and each interior room lamp connector.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace harness or connectors.

3. CHECK BATTERY SAVER OUTPUT/POWER SUPPLY SHORT CIRCUIT

Check continuity between BCM connector M21 terminal 129 and ground.





Is the inspection result normal?
YES- Check that each interior room lamp has no internal short circuit.
NO- Repair or replace harness or connectors.