Diagnostic Starting Point

Begin the system diagnosis with DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS . The Diagnostic System Check - Engine Controls will provide the following information:

1. The identification of the control modules which command the system.
2. The ability of the control modules to communicate through the serial data circuit.
3. The identification of any stored Diagnostic Trouble Codes (DTCs) and the codes' statuses.

The use of the Diagnostic System Check - Engine Controls will identify the correct procedure for diagnosing the system and where the procedure is located.