Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check that the following fuse is not blown.

   Signal name	Fuse No.
   Battery power supply	20

Is the fuse fusing?

YES 

GO TO STEP 3. 

NO 

GO TO STEP 2. 

1. Disconnect BCM connectors.
2. Check voltage between BCM harness connector and ground.

   (+)		(-)	Voltage
   BCM
   Connector	Terminal
   M17	131	Ground	9 - 16 V

Is the measurement value normal?

YES 

Check intermittent incident. Refer to INTERMITTENT INCIDENT .

NO 

Repair harness or connector.

1. Disconnect BCM connectors.
2. Check continuity between BCM harness connector and ground.

   BCM		Ground	Continuity
   Connector	Terminal
   M17	131		Not existed

Does continuity exist?

YES 

Repair harness or connector.

NO 

GO TO STEP 4. 

1. Disconnect following connectors.
   • Map lamp
   • Personal lamp
   • Vanity mirror lamp (both sides)
   • Outside handle lamp (both sides)
   • Step lamp (ALL)
   • Trunk room lamp
2. Check continuity between BCM harness connector and ground.

   BCM		Ground	Continuity
   Connector	Terminal
   M17	129		Not existed

Does continuity exist?

YES 

Repair harness or connector.

NO 

Check interior room lamp. If result is normal, replace BCM. Refer to REMOVAL AND INSTALLATION .