Diagnostic Starting Point - Engine Controls
WARNING: This page is about a different car, the 2006 Saturn Ion 3 and 2006 Saturn Ion 2. However, it is still accessible from the selected car via links, so may be relevant.
Begin the system diagnosis with Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check-Vehicle will provide the following information:
- The identification of the control modules which command 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 the codes' statuses
The use of the Diagnostic System Check-Vehicle will identify the correct procedure for diagnosing the system and where the procedure is located.