Test K: The Courtesy Lamps Are Inoperative -From the Dimmer Control Switch

PINPOINT TEST K: THE COURTESY LAMPS ARE INOPERATIVE FROM THE DIMMER CONTROL SWITCH

K1-K4:

K4-K6:

Normal Operation
The smart junction box (SJB) monitors the dimmer control switch status on circuit CLN28 (GN/BU) to determine if the courtesy lamps are requested. Based on the dimmer control switch status, the SJB supplies voltage to the courtesy lamps through circuit CLN03 (YE/GY).

DTC B1687 - sets when the SJB detects a short to voltage on the dome defeat input circuit.

DTC B1688 - sets when the SJB detects a short to ground on the dome defeat input circuit.

DTC B2121 - sets when the SJB detects a short to voltage on the illumination switch circuit.

DTC B2132 - sets when the SJB detects a short to ground on the dimmer switch circuit.

Possible Causes
- Circuit CLN28 (GN/BU) open
- Dimmer control switch
- SJB