SC9K-5 Courtesy Lamps Inoperative When Unlock Function Is Used
COURTESY LAMPS DO NOT TURN "ON" WHEN UNLOCK FUNCTION IS OPERATED (COURTESY LAMPS TURN "ON" WHEN ANY DOOR IS OPEN) UNLOCK FUNCTION OPERATES NORMALLYSC9K-5:
Circuit Description
When the unlock button on the transmitter is pressed, the keyless entry receiver grounds CKT 156 to activate courtesy lamps and start an internal timer. If the internal timer reaches 30 seconds or the ignition switch is turned to "RUN," the keyless entry receiver removes the ground on CKT 156. The keyless entry receiver senses voltage from Fuse 17 on CKT 39 when the ignition switch is turned to "RUN" to reset the internal timer.
Test Description
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Check for a false ignition "ON" signal to the keyless entry receiver.
2. Check CKT 156, courtesy lamp circuit, to the keyless entry receiver.