1.CHECK TRUNK ROOM LAMP SWITCH INPUT SIGNAL

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.

   (+) | (–) | Condition | Signal (Reference value)
   Trunk lid lock assembly
   Connector | Terminal
   B352 | 1 | Ground | Trunk lid | Open | 0
   Close |

Is the inspection result normal?
YES>>GO TO 3.
NO>>GO TO 2.
2.CHECK TRUNK ROOM LAMP SWITCH CIRCUIT

1. Disconnect BCM connector.
2. Check continuity between BCM harness connector and trunk lid lock assembly harness connector.

   BCM | Trunk lid lock assembly | Continuity
   Connector | Terminal | Connector | Terminal
   M121 | 50 | B352 | 1 | Existed

3. Check continuity between BCM harness connector and ground.

   BCM | Ground | Continuity
   Connector | Terminal
   M121 | 50 | Not existed

Is the inspection result normal?
YES>>Replace BCM. Refer to Removal and Installation.
NO>>Repair or replace harness.
3.CHECK TRUNK ROOM LAMP SWITCH GROUND CIRCUIT
Check continuity between trunk lid lock assembly connector and ground.

Trunk lid lock assembly | Ground | Continuity
Connector | Terminal
B352 | 2 | Existed

Is the inspection result normal?
YES>>GO TO 4.
NO>>Repair or replace harness.
4.CHECK TRUNK ROOM LAMP SWITCH
Refer to Component Inspection.
Is the inspection result normal?
YES>>GO TO 5.
NO>>Replace trunk lid lock assembly. Refer to Removal and Installation.
5.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
>>INSPECTION END.