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Symptom Troubleshooting Index

SYMPTOM TROUBLESHOOTING CHART

Symptom Diagnostic procedure Also check for
Navigation system stays on the GPS initialization screen System Initialization (see SYSTEM INITIALIZATION  )
  • Navigation unit
  • GPS antenna/cable
  • Harness/fuses/switches
Address cannot be found or system gives poor routing Verify proper operation using the owner's manual  
Some set-up and information functions of the navigation system do not work Customer did not select "OK" from Disclaimer screen. Refer to the System Function Diagram (see SYSTEM FUNCTION DIAGRAM  )  
Previous Destinations button is dim and not selectable in the Enter destination by screen The vehicle may be new, or the customer deleted them. Enter a destination, and allow the system to route to it. After the trip, the Previous Destinations button will be selectable  
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  
Vehicle position icon constantly leaves road, moves erratically, is very far from actual position, or spins when parked on land Troubleshooting (see VEHICLE POSITION ICON CONSTANTLY LEAVES ROAD, MOVES ERRATICALLY, IS VERY FAR FROM ACTUAL POSITION, OR SPINS WHEN PARKED ON LAND )
  • Navigation unit
  • GPS antenna/cable
  • ECM/PCM (speed and fuel pulses)
  • Harness/fuses/switches
No picture is displayed Troubleshooting (see NO PICTURE IS DISPLAYED )
  • Navigation unit
  • Display panel control unit
  • Harness/fuses/switches
Picture is missing a color or tone Troubleshooting (see PICTURE IS MISSING A COLOR OR TONE )
  • Navigation unit
  • Display panel control unit
  • Harness/fuses/switches
Picture has lines/rolls/other issues or is an odd color Troubleshooting (see PICTURE HAS LINES/ROLLS/OTHER ISSUES OR IS AN ODD COLOR )
  • Navigation unit
  • Display panel control unit
  • Harness/fuses/switches
Display panel control unit buttons or touch screen buttons do not work or respond properly Troubleshooting (see DISPLAY PANEL CONTROL UNIT BUTTONS OR TOUCH SCREEN BUTTONS DO NOT WORK OR RESPOND PROPERLY )
  • Navigation unit
  • Display panel control unit
  • Harness/fuses/switches
GPS icon is white or not shown Troubleshooting (see GPS ICON IS WHITE OR NOT SHOWN )
  • Navigation unit
  • GPS antenna/cable
  • Harness/fuses/switches
Voice guidance cannot be heard Troubleshooting (see GPS ICON IS WHITE OR NOT SHOWN )
  • Navigation unit
  • Audio unit/amplifier
  • Harness/fuses/switches
Voice control does not work/respond Troubleshooting (see VOICE CONTROL DOES NOT WORK/RESPOND )
  • Navigation unit
  • Microphone/voice control switch
  • Harness/fuses/switches
DVD screen error messages Troubleshooting (see VEHICLE POSITION ICON CONSTANTLY LEAVES ROAD, MOVES ERRATICALLY, IS VERY FAR FROM ACTUAL POSITION, OR SPINS WHEN PARKED ON LAND )
  • Navigation unit
  • Display panel control unit
  • DVD
Navigation cannot control A/C by voice Troubleshooting (see NAVIGATION CANNOT CONTROL A/C BY VICE )
  • Display panel control unit
  • Harness/fuses/switches
Display day/night mode does not work Troubleshooting (see NAVIGATION CANNOT CONTROL A/C BY VICE )
  • Display panel control unit
  • Gauge control module (CAN)
  • Harness/fuses/switches
System locks up constantly Troubleshooting (see SYSTEM LOCKS UP CONSTANTLY )
  • Navigation unit
  • Harness/fuses/switches
  • DVD
Vehicle icon wanders across the map when driving (does not follow a displayed road) or map or vehicle ICON spins Troubleshooting (see SYSTEM LOCKS UP CONSTANTLY )
  • Navigation unit
  • GPS antenna/cable
  • ECM/PCM
Navigation drives by itself when parked Troubleshooting (see NAVIGATION DRIVES BY ITSELF WHEN PARKED )  
Navigation stays on with ignition switch off Troubleshooting (see NAVIGATION DRIVES BY ITSELF WHEN PARKED )  
Navigation cannot control audio/disc Troubleshooting (see NAVIGATION CANNOT CONTROL AUDIO/DISC )  
Audio-HVAC subdisplay unit does not work properly Troubleshooting (see NAVIGATION CANNOT CONTROL AUDIO/DISC )
  • Navigation unit
  • Audio-HVAC subdisplay unit
  • Harness/fuses/switches
Audio-HVAC subdisplay does not match time in set-up Make sure HU time send is ON (see TIRE CALIBRATE )  
Time is not correct Reset Time Adjustment in set-up  
Navigation does not call using the HFL Troubleshooting (see NAVIGATION DOES NOT CALL USING THE HFL )  
Navigation cannot control XM radio Troubleshooting (see NAVIGATION CANNOT CONTROL XM RADIO )  
Navigation frequently asks for code and needs GPS initialization Troubleshooting (see NAVIGATION CANNOT CONTROL XM RADIO )
  • Navigation unit
  • Harness/fuses/switches