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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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No picture is displayed
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Address cannot be found or system gives poor routing
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Verify proper operation using the owner's manual
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Compare to another like vehicle
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Vehicle position icon constantly leaves road, is erratic, or is very far from actual position
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Picture is missing a color or tone
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Picture has lines/other issues
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Interface dial buttons do not work
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GPS icon does not indicate
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Voice guidance cannot be heard
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Voice control does not work/respond
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DVD screen error messages
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Voice control cannot control A/C
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Display day/night mode does not work
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System locks up constantly
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An In Line Diag screen appears everytime the vehicle is started
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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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Navigation stays on with ignition switch off
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Navigation cannot control audio/disc
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Navigation frequently asks for code and needs GPS initialization
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Poor RDS-TMC reception or interference
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