Test C: The Courtesy Lamps Stay On Continuously

PINPOINT TEST C: THE COURTESY LAMPS STAY ON CONTINUOUSLY

C1-C4:

C4-C8:

C8-C10:

C10-C12:

C12-C15:

C15-C17:

C18-C20:

Normal Operation
When any door, liftgate, or liftgate glass 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 driver door ajar circuit.

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

DTC B1331 - is an on-demand DTC that sets when the SJB detects an open from the liftgate or the liftgate glass ajar circuit.

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

DTC B1572 - is an on-demand DTC that sets when the SJB detects an open from the LR 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 glass or the liftgate ajar circuit.

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

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

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

DTC B2723 - is an on-demand DTC that sets when the power liftgate module detects an open from the liftgate glass ajar circuit.

Possible Causes
- Circuit CPL10 (GN/WH) open
- Circuit CPL26 (GN/VT) open
- Circuit CLN28 (GN/BU) short to ground
- Circuit CPL31 (WH) open
- Circuit CPL36 (GN) open
- Circuit CPL39 (YE) open
- Circuit CPL58 (GY/OG) open
- Circuit GD138 (BK/WH) open
- Circuit GD143 (BK/VT) open
- Circuit GD150 (BK/WH) open
- Circuit VLN33 (GY/VT) short to voltage
- Dimmer switch
- Ajar switch
- Liftgate ajar switch
- Liftgate glass ajar switch
- Power liftgate module
- SJB