Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect trunk lid lock assembly connector.
3. Check signal between trunk lid lock assembly harness connector and ground using oscilloscope.
   TRUNK ROOM LAMP SWITCH INPUT SIGNAL REFERENCE CHART
   
   

   (+)		(-)	Signal (Reference value)
   Trunk lid lock assembly
   Connector	Terminal
   B303	1	Ground

   Is the inspection result normal? 

   YES: GO TO  3.

   NO: GO TO 2.

1. Disconnect BCM connector.
2. Check continuity between BCM harness connector and trunk lid lock assembly harness connector.
   TERMINALS CONTINUITY REFERENCE CHART
   
   

   BCM		Trunk lid lock assembly		Continuity
   Connector	Terminal	Connector	Terminal
   M121	50	B303	1	Existed

3. Check continuity between BCM harness connector and ground.
   TERMINALS CONTINUITY REFERENCE CHART
   
   

   BCM		Ground	Continuity
   Connector	Terminal
   M121	50		Not existed

   Is the inspection result normal? 

   YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

   NO: Repair harness or connector.

Check continuity between trunk lid lock assembly harness connector and ground.

Is the inspection result normal? 

YES: GO TO 4.

NO: Repair or replace harness.

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 5.

NO: Replace trunk lid lock assembly. Refer to "TRUNK LID ASSEMBLY : REMOVAL AND INSTALLATION ".

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END