Test C: The Courtesy Lamps Stay On Continuously

PINPOINT TEST C: THE COURTESY LAMPS STAY ON CONTINUOUSLY

C1-C3:

C3-C8:

C8-C10:

C10-C13:

C13-C15:

Normal Operation
When any door or the liftgate is opened, the ajar switch or the power liftgate module opens the circuit to the smart junction box (SJB). The SJB monitors the ajar circuits, and based on the ajar status, the SJB supplies voltage to the courtesy lamps on circuit VLN33 (GY/VT).

DTC B1320 - is an on-demand DTC that sets when the SJB detects an open from the LH front door ajar circuit.

DTC B1328 - is an on-demand DTC that sets when the SJB detects an open from the RH front door ajar circuit.

DTC B1336 - is an on-demand DTC that sets when the SJB detects an open from the RH rear door ajar circuit.

DTC B1572 - is an on-demand DTC that sets when the SJB detects an open from the LH rear door ajar circuit.

DTC B1688 - is an on-demand DTC that sets when the SJB detects a short to ground from the dimmer switch circuit.

DTC B2077 - is an on-demand DTC that sets when the SJB detects an open from the liftgate ajar circuit.

DTC B2A35 - is an on-demand DTC that sets when the SJB detects a short to voltage from the courtesy lamp output circuit.

DTC B2718 - is a continuous and on-demand DTC that sets when the power liftgate module detects a short to voltage from the liftgate ajar input circuit to the SJB.

DTC B2721 - is a continuous and on-demand DTC that sets when the power liftgate module detects an open from the liftgate ajar input circuit to the SJB.

Possible Causes
- Circuitry
- Ajar switch
- Liftgate ajar switch
- Dimmer switch
- Power liftgate module
- SJB