For 1990-2009 cars

Important: The following steps must be completed before using the symptom table.

• | Perform the Diagnostic System Check - Vehicle before using the symptom tables in order to verify that all of the following are true:

- | No DTCs are set.

- | The ability of the control module to communicate through serial data circuit

• | Review Navigation System Description and Operation in order to familiarize yourself with the system functions.

### Visual/Physical Inspection

• | Inspect for aftermarket devices which could affect the operation of the navigation system components. 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 the following list for diagnosis procedures in order to diagnose the symptom.

• | No Global Positioning System (GPS) Reception

• | Auxiliary RCA Video Jacks - Audio Inoperative or Degraded Quality

• | Auxiliary RCA Video Jacks - Video Inoperative or Degraded Quality

• | Navigation System - Voice Recognition Inoperative

• | For radio/audio related symptoms, refer to Symptoms - Entertainment.