Test D: The Courtesy Lamps Stay On Continuously

PINPOINT TEST D: THE COURTESY LAMPS STAY ON CONTINUOUSLY

D1-D2:

D3-D4:

D5-D6:

D6-D10:

D10-D11:

Normal Operation
When a door is opened, the door ajar input from circuit 1312 (LG/BK) or circuit 1314 (YE/GN) to the smart junction box (SJB) open. When the SJB identifies that the circuit is open, the SJB provides voltage to the courtesy lamps through circuit 53 (BK/LB). The door ajar switches are grounded through circuit 1205 (BK). When the dimmer switch is rotated to the interior lamps ON position, the SJB receives a signal through circuit 2085 (VT/YE), requesting the courtesy lamps.

DTC B1319 - sets when the SJB detects an open on the driver door ajar switch circuit.

DTC B1327 - sets when the SJB detects an open on the passenger door ajar switch circuit.

DTC B2554 - sets when the SJB detects a short to voltage on the dome lamp output supply circuit.

Possible Causes
- Circuit 53 (BK/LB) short to voltage
- Circuit 54 (LG/YE) short to ground
- Circuit 1205 (BK) open
- Circuit 1312 (LG/BK) open
- Circuit 1314 (YE/LG) open
- Circuit 2085 (VT/YE) short to ground
- Door ajar switch
- Dimmer switch
- SJB