Diagnosis Procedure

Provides the battery saver output/power supply. Cuts the power supply when the interior room lamp battery saver is activating.

1. CHECK BATTERY SAVER OUTPUT/POWER SUPPLY OUTPUT 

   CONSULT

   1. Turn ignition switch ON.
   2. Select "Battery Saver" in "Active Test" mode of "BCM".
   3. While operating the test item, check voltage between BCM connector M81 terminal 129 and ground.

   BCM		(-)	Test item		Voltage (Approx.)
   (+)
   Connector	Terminal
   M81	129	Ground	BATTERY SAVER	Off	Battery voltage
   				On	0V

   Is the inspection result normal?

   YES

   GO TO 2 .

   NO

   Replace BCM after making sure the battery saver output/power supply circuit is not shorted to voltage. Refer to Removal and Installation .

2. CHECK BATTERY SAVER OUTPUT/POWER SUPPLY OPEN CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect the following connectors.
      • BCM M81
      • Door mirror LH (with puddle lamps) (if equipped) D4
      • Door mirror RH (with puddle lamps) (if equipped) D107
      • Front room/map lamp assembly (with front roof console) (if equipped) R13
      • Front room/map lamp assembly (without front roof console) (if equipped) R14
      • Vanity lamp LH (if equipped) R3
      • Vanity lamp RH (if equipped) R8
      • Front foot lamp LH (if equipped) M93
      • Front foot lamp RH (if equipped) M92
      • Personal lamp R11
   3. Check continuity between BCM connector M81 terminal 129 and each interior room lamp connector.

   BCM		Each interior room lamp			Continuity
   Connector	Terminal	Connector		Terminal
   M81	129	Door mirror LH (with puddle lamps) (if equipped)	D4	21	Yes
   		Door mirror RH (with puddle lamps) (if equipped)	D107	21
   		Front room/map lamp assembly (with front roof console) (if equipped)	R13	1
   		Front room/map lamp assembly (without front roof console) (if equipped)	R14	1
   		Vanity lamp LH (if equipped)	R3	1
   		Vanity lamp RH (if equipped)	R8	1
   		Front foot lamp LH (if equipped)	M93	1
   		Front foot lamp RH (if equipped)	M92	1
   		Personal lamp	R11	1

   Is the inspection result normal?

   YES

   GO TO 3 .

   NO

   Repair the harness or connectors.

3. CHECK BATTERY SAVER OUTPUT/POWER SUPPLY SHORT CIRCUIT 

   Check continuity between BCM connector M81 terminal 129 and ground.

   BCM		(-)	Continuity
   Connector	Terminal
   M81	129	Ground	No

   Is the inspection result normal?

   YES

   Check that each interior room lamp has no internal short circuit.

   NO

   Repair the harness or connectors.