Begin the Instrument Panel (I/P) System diagnosis with the appropriate Diagnostic System Check. Refer to Diagnostic System Check - Vehicle in Vehicle DTC Information.
The Diagnostic System Check 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 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 night vision diagnosis by reviewing the system operation. Reviewing the operation information will help you determine the correct symptom diagnostic procedure when a 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 night vision system and where the procedure is located.
