Diagnostic Starting Point - Lighting Systems
WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
Begin the system diagnosis with the DIAGNOSTIC SYSTEM CHECK - VEHICLE . The Vehicle System Check will provide the following information:
- The identification of the control modules which commands the system
- The ability of the control modules to communicate through the serial data circuit
- The identification of any stored diagnostic trouble codes (DTCs) and their status
The use of Vehicle System Check will identify the correct procedure for diagnosing the system and where the procedure is located.