Diagnostic Starting Point

Begin the IP system diagnosis with the appropriate Diagnostic System Check:
^ Diagnostic System Check - Instrument Cluster
^ Diagnostic System Check - Audible Warnings.

The Diagnostic System Check will provide the following information:
^ The identification of the control module(s) which command the system.
^ The ability of the control module(s) to communicate through the serial data circuit.
^ The identification of any stored diagnostic trouble codes (DTCs) and their status.

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

Begin the Driver Information Center (DIC) or night vision diagnosis by reviewing the system operation. Reviewing the operation information will help you determine the correct symptom diagnostic procedure when an DIC or night vision malfunction exists. Reviewing the operation information will also help you determine if the condition described by the customer is normal operation. Refer to Symptoms - Instrument Panel, Gages and Console in order to identify the correct procedure for diagnosing the DIC or night vision system and where the procedure is located. Symptom Related Diagnostic Procedures