For 1990-2009 cars

Begin the instrument panel (I/P) system diagnosis with the appropriate Diagnostic System Check - Vehicle. Refer to 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 DTCs and their status

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