A Symptom Diagnosis - Navigation Systems

IMPORTANT:
1. Perform the A Diagnostic System Check - Navigation System before using the Symptom Tables in order to verify that all of the following are true:
^ There are no DTCs set.
^ The control module(s) can communicate via the serial data link.
2. Review the system 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 in Diagrams.
^ Inspect the easily accessible or visible 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 and Poor Connections in Diagrams.

SYMPTOM LIST
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
^ Navigation System Display Inoperative
^ Navigation System - Poor or Inoperative TV Reception
^ Navigation System - Poor Audio Prompt Quality
^ Aux RCA Video Jacks - Audio Inoperative or Degraded Quality
^ Aux RCA Video Jacks - Video Inoperative or Degraded Quality
^ Navigation System - Voice Guidance Inoperative or Degraded Quality