|
|
Symptom: HEADLAMP SWITCH INPUT OPEN-BCM POSSIBLE CAUSES HEADLAMP SWITCH MUX CIRCUIT OPEN HEADLAMP SWITCH MUX RETURN CIRCUIT OPEN HEADLAMP SWITCH OPEN INTERMITTENT WIRING AND CONNECTORS BODY CONTROL MODULE TEST ACTION APPLICABILITY 1 Turn the ignition on. t, clear all BCM DTC’s. Turn the headlamps to the ON position. t, read DTCs. Does the DRBIII t display HEADLAMP SWITCH INPUT OPEN? All Yes → Go To 2 No → Go To 5 2 Turn the ignition off. t, select Body, Body Controller and read the Headlamp Switch volts. Does the DRBIII t Headlamp Switch Sensor voltage read less than 0.5 Volts? All Yes → Replace the Headlamp Switch in accordance with the Service Information. No → Go To 3 3 Turn the ignition off to the lock position. All Yes → Repair the Headlamp Switch MUX circuit for an open. Perform BODY VERIFICATION TEST - VER 1. No → Go To 4 457 EXTERIOR LIGHTING |