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Symptom
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Diagnostic procedure
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Also check for
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Navigation system stays on the GPS initialization screen
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Vehicle position icon constantly leaves road, moves erratically, or is very far from actual position
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System always comes up in in-line diagnostic mode
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Navigation frequently asks for anti-theft code and/or needs GPS initialization
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GPS icon is white or not shown
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Vehicle icon wanders across the map when driving (does not follow a displayed road) or map or vehicle ICON spins
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No picture is displayed
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Picture has lines/rolls/other issues or is an odd color
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Picture is missing a color or tone or is an odd color
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Display day/night mode does not work or does not work properly
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System locks up or freezes constantly
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Voice guidance cannot be heard, is broken up, or there is static
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Voice control does not work/respond
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Navigation unit microphone harness/switches Hands Free Telephone control unit
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Navigation cannot control HVAC by voice command
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Navigation cannot control audio system
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Interface dial and/or buttons do not work
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Today's Destinations button is dim and not selectable in the Enter destination by screen (grayed-out)
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The client 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.
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See Owner's Manual
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Previous Destinations button is dim and not selectable in the Enter destination by screen (grayed-out)
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The vehicle may be new, or the customer deleted the destination. Without a stored previous destination, the system can't route to a previous destination. Enter a destination, and allow the system to route to it. After the trip, the Previous Destinations button will be selectable.
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Address cannot be found or system gives poor routing
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Navigation display stays on with ignition switch in LOCK (0)
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DVD screen error messages
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Navigation system will not go beyond the disclaimer screen and displays the OK button
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See navigation display buttons do not work or respond properly
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The navigation anti-theft code card is lost or missing
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The vehicle icon lags behind when the vehicle turns
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Navigation screen is darker than normal or takes time to brighten when it is cold
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The navigation clock is off by 1 to 3 hours after replacing the navigation unit
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Navigation time is not correct
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Reset Time Adjustment in set-up
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The DVD is scratched or dirty
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Navigation unit
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The wrong DVD was installed and now the system does not function properly
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An In Line Diagnosis screen appears every time vehicle is started
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Navigation unit will not eject or accept the navigation DVD
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Poor RDS-TMC reception or interference
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