Test C: The Interior Lamps Stay On Continuously

PINPOINT TEST C: THE INTERIOR LAMPS STAY ON CONTINUOUSLY.

C1-C4:

C5-C10:

C10-C13:

Normal Operation
The driver door module (DDM) monitors the door ajar switch status for each door. When a door is open, the DDM signals the lighting control module (LCM) to supply power to the interior lamps. The interior lamps are powered through circuit 53 (BK/LB). The LCM also monitors the dome lamp switch status from the instrument panel dimmer switch through circuit 1034 (BK/WH). When the LCM recognizes that the dome lamps have been requested, the LCM supplies power to the interior lamps on circuit 53 (BK/LB).

DTC B1322 - sets when the DDM senses a short to ground on the driver door ajar input, circuit 867 (DB).

DTC B1566 - sets when the DDM senses a short to ground on any of the passenger door ajar inputs, circuit 627 (BK/OG).

DTC B1688 - sets when the LCM senses a short to ground on the dome lamp switch input, circuit 1034 (BK/WH).

Possible Causes
- Circuit 53 (BK/LB) short to voltage
- Circuit 627 (BK/OG) short to ground
- Circuit 867 (DB) short to ground
- Circuit 1034 (BK/WH) short to ground
- Door ajar switch(es)
- Instrument panel dimmer switch
- DDM
- LCM