DTC Diagnosis Procedure

Controls the following interior room lamps (ground side) by PWM signal.

• Front room/map lamp assembly
• Front and center cargo lamp (if equipped)
• Rear cargo lamp

1. CHECK INTERIOR ROOM LAMP CONTROL OUTPUT 

   CONSULT

   1. Place each room lamp switch into the DOOR position on an individual basis. Test each of the following switches individually.
      • Front room/map lamp
      • Front cargo lamp (if equipped)
      • Center cargo lamp (if equipped)
      • Rear cargo lamp
   2. Turn ignition switch ON.
   3. Select "INT LAMP" of BCM (INT LAMP) active test item.
   4. While operating the test item, check voltage between BCM connector M20 terminal 63 and ground.

   (+)		(-)	INT LAMP	Voltage
   Connector	Terminal
   M20	63	Ground	ON	0 V
   			OFF	Battery voltage

   Is the inspection result normal?

   YES

   Interior room lamp control circuit is operating normally.

   Fixed ON

   GO TO 3

   Fixed OFF

   GO TO 2

2. CHECK INTERIOR ROOM LAMP CONTROL OPEN CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect BCM harness connector M20 and interior room lamp harness connector in question.
   3. Check continuity between BCM harness connector M20 terminal 63 and interior room harness connector terminal in question.

      BCM		Interior room lamp			Continuity
      Connector	Terminal	Component	Connector	Terminal
      M20	63	Front room/map lamp	R25	3	Yes
      		Front cargo lamp	R26	2
      		Center cargo lamp	R27	2
      		Rear cargo lamp	R28	2

   Is the inspection result normal?

   YES

   Check interior room lamps for an open. If NG, replace lamp in question. Refer to Removal and Installation (Front Room/Map Lamp), Removal and Installation - Front, Center or Rear (Cargo Lamp). If OK, replace BCM. Refer to Removal and Installation .

   NO

   Repair the harness or connectors.

3. CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect BCM harness connector M20.
   3. Check continuity between BCM harness connector M20 terminal 63 and ground.

   Connector	Terminal	--	Continuity
   M20	63	Ground	No

   Is the inspection result normal?

   YES

   Check interior room lamps for a short circuit. If NG, replace lamp in question. Refer to Removal and Installation (Front Room/Map Lamp), Removal and Installation - Front, Center or Rear (Cargo Lamp). If OK, replace BCM. Refer to Removal and Installation .

   NO

   Repair the harness or connectors.