Diagnostic Aids
WARNING: This page is about a different car, the 2000 Chevrolet Corvette and 1999 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
An intermittent short to voltage or short to ground in the following left door switch illumination or indicator control circuits between LDCM and left door switch may cause an intermittent malfunction:
- Left door switch illumination control circuit (Gray wire).
- Memory 1 switch illumination control circuit (Dark Blue wire).
- Memory 2 switch illumination control circuit (Dark Blue/White wire).
- Left mirror switch illumination control circuit (Dark Blue wire).
- Right mirror switch illumination control circuit (Light Blue wire).
- If left door switch indicator light itself is shorted.
Using scan tool, select LDCM data and monitor DOOR SWITCH PAD ILLUMINATION while rotating interior light dimming switch. Switch illumination level varies from 0-100 percent based upon dimming level information LDCM receives on the serial data line. This checks if LDCM is able to receive correct dimming information from serial data line.