Navigation System Symptom Troubleshooting

Symptom | Diagnostic procedure | Also check for
--- | --- | ---
Navigation system stays on the GPS initialization screen | System Initialization | Navigation unit Wrong colored disc installed GPS antenna/cable Harness/fuses/switches
No picture is displayed | Troubleshooting | Navigation unit Aftermarket accessories connected to the system Display unit Harness/fuses/switches
Address cannot be found or system gives poor routing | Verify proper operation using the owner's manual | Wrong colored disc installed
Vehicle position icon constantly leaves road or is very far from actual position | Troubleshooting | Navigation unit GPS antenna/cable PCM (speed pulse missing) Harness/fuses/switches
Picture is missing a color or tone | Troubleshooting | Navigation unit Wrong colored disc installed Harness/fuses/switches Aftermarket accessories connected to the system
Picture has lines/rolls/other issues | Troubleshooting | Navigation unit Display unit Harness/fuses/switches
Display unit buttons or touch screen buttons do not work or respond properly | Troubleshooting | Display unit Wrong colored disc installed Harness/fuses/switches
GPS icon is white or not shown | Troubleshooting | Navigation unit Aftermarket accessories connected to the system GPS antenna/cable Harness/fuses/switches
Voice guidance cannot be heard | Troubleshooting | Navigation unit Audio unit/amplifier Volume or Voice feedback settings (see Owner's manual for details) Harness/fuses/switches
Voice control does not work/respond | Troubleshooting | Navigation unit Volume or Voice feedback settings (see Owner's manual for details) Microphone/steering buttons Harness/fuses/switches
DVD screen error messages | Troubleshooting | Navigation unit Wrong colored disc installed Display unit Damaged DVD disc
Navigation cannot control A/C | Troubleshooting | Display unit Wrong colored disc installed Wrong unit (model code) Harness/fuses/switches
Display day/night mode does not work | Troubleshooting | Display unit Display brightness set to ‘‘High'' Gauge assembly (CAN) Harness/fuses/switches
System locks up constantly | Troubleshooting | Navigation unit Harness/fuses/switches Wrong colored disc installed Damaged DVD disc
Vehicle icon wanders across the map when driving (does not follow a displayed road) or spins when driving | Troubleshooting | Navigation unit Wrong colored disc installed Damaged DVD disc
Navigation drives by itself when parked | Troubleshooting |
Navigation stays on with ignition switch off | Troubleshooting | Harness/fuses/switches Aftermarket accessories connected to the system
Navigation cannot control audio/CD | Troubleshooting | Display unit Wrong colored disc installed Audio unit/amplifier
Audio-HVAC subdisplay does not work properly | Troubleshooting | Navigation unit Subdisplay unit Harness/fuses/switches
Time is not correct | Reset Time Adjustment in set-up |
Navigation frequently asks for code and needs GPS initialization | Troubleshooting | Navigation unit Low battery Harness/fuses/switches
Poor RDS-TMC Reception or Interference | Troubleshooting |
Some set-up and information functions of the navigation system do not work | Customer did not select ‘‘OK'' from Disclaimer screen. |
Previous Destinations button is dim and not selectable in the Enter destination by screen | The vehicle may be new, or the customer deleted the destination. Enter a destination, and allow the system to route to it. After the trip, the Previous Destinations button will be selectable. | Owner's manual for details
Today's Destinations button is dim and not selectable in the Enter destination by screen | The customer has not entered a group of locations for Today's Destinations. This is normal. The button is only selectable if the customer is using this function. | Owner's manual for details
The navigation system will not Map Match | Refer to troubleshooting for Vehicle icon wanders across the map when driving |