For 1990-2009 cars only
Important: The following steps must be completed before using the symptom tables.
- Perform the Diagnostic System Check - Vehicle before using the Symptom Tables in order to verify that all of the following are true:
- Review the system operation in order to familiarize yourself with the system functions. Refer to Radio/Audio System Description and Operation .
| • | No DTCs are set. |
| • | The ability of the control module to communicate through serial data circuit |
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation of the radio. Refer to Checking Aftermarket Accessories . |
| • | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. |
Intermittent Conditions
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
For navigation related symptoms, refer to Symptoms - Navigation Systems .
