Diagnostic Starting Point
Begin the system diagnosis with Diagnostic System Check - Engine Controls.Initial Inspection and Diagnostic OverviewThe Diagnostic System Check-Engine Controls 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-Engine Controls will identify the correct procedure for diagnosing the system and where the procedure is located.