For 1990-2009 cars only
Important: The following steps must be completed before using the symptom tables.
- Review the system operation in order to familiarize yourself with the system functions. Refer to Navigation System Description and Operation .
- Perform the Diagnostic System Check - Vehicle in Vehicle DTC Information before using the Symptom Tables in order to verify that all of the following are true:
- Review the Navigation Diagnostic Self-Test Features before using the Symptoms Tables in order to verify the navigation system is receiving all the necessary inputs from the vehicle sensors.
| • | There are no codes set. |
| • | The navigation radio can communicate with the global positioning system (GPS) antenna. |
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation of the navigation system. Refer to Checking Aftermarket Accessories in Wiring Systems. |
| • | Inspect the system components for obvious damage or conditions which could cause the symptom. |
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
| • | Navigation radio buttons do not function properly. Refer to Navigation Diagnostic Self-Test Features . |
| • | Navigation radio does not read the map disc. Refer to Diagnostic Trouble Code (DTC) List . |
| • | The display is inoperative, discolored, or not clear. Refer to Navigation System Display Inoperative . |
