FixVault

Symptom Troubleshooting Index

NOTE: Also see the "symptom column" for the Navigation unit inputs and outputs for connector A, B, C, D, and E for additional symptom (see NAVIGATION UNIT INPUTS AND OUTPUTS FOR CONNECTOR A (20P) ).
SYMPTOM TROUBLESHOOTING INDEX

Symptom Diagnostic procedure Also check for
Navigation system stays on the GPS initialization screen System Initialization (see SYSTEM INITIALIZATION )
  • Navigation unit
  • Wrong color DVD installed or DVD is dirty or damaged
  • Display unit
  • GPS antenna or cable
  • Harness/fuses/switches
No picture is displayed Troubleshooting (see NO PICTURE IS DISPLAYED )
  • Navigation unit
  • Wrong color DVD installed or DVD is dirty or damaged
  • GPS antenna or cable
  • Display unit
  • Harness/fuses/switches
Picture is missing a color or tone (in all gear positions) Troubleshooting (see PICTURE IS MISSING A COLOR OR TONE (IN ALL GEAR POSITIONS)  )
  • Wrong color DVD installed or DVD is dirty or damaged
  • Contrast and brightness settings
  • Navigation unit
  • Harness/fuses/switches
Picture has lines/rolls/other issues Troubleshooting (see PICTURE HAS LINES/ROLLS/OTHER ISSUES )
  • Navigation unit
  • Wrong color DVD installed or DVD is dirty or damaged
  • Display unit
  • Harness/fuses/switches
Display unit buttons or touch screen buttons do not work or respond properly Troubleshooting (see DISPLAY UNIT BUTTONS OR TOUCH SCREEN BUTTONS DO NOT WORK OR RESPOND PROPERLY )
  • Display unit
  • Navigation 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 VOICE GUIDANCE CANNOT BE HEARD )
  • Navigation unit
  • Wrong color DVD installed or DVD is dirty or damaged
  • Navigation set-up settings
  • Audio unit/amplifier
  • Harness/fuses/switches
Voice control does not work/respond Troubleshooting (see VOICE CONTROL DOES NOT WORK/RESPOND )
  • Navigation unit
  • Wrong color DVD installed or DVD is dirty or damaged
  • Navigation set-up settings
  • Microphone/steering buttons
  • Harness/fuses/switches
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 OR ICON WILL NOT MOVE WHEN DRIVING )
  • Navigation unit
  • Aftermarket electronic devices near GPS antenna or Navigation unit
  • GPS antenna/cable
  • PCM (no VSP signal)
  • Harness/fuses/switches
DVD screen error messages Troubleshooting (see DVD SCREEN ERROR MESSAGES )
  • Navigation unit
  • Display unit
  • Wrong color DVD installed or DVD is dirty or damaged
No rearview camera picture is displayed or screen goes black when placed in reverse Troubleshooting (see NO REARVIEW CAMERA PICTURE IS DISPLAYED OR SCREEN GOES BLACK WHEN PLACED IN REVERSE )
  • Navigation unit
  • Rearview camera brightness settings
  • Harness/connections
  • Rearview camera control unit
  • No reverse signal
  • Rearview camera
The rearview camera picture is missing a color or tone, or picture rolls Troubleshooting (see THE REARVIEW CAMERA PICTURE IS MISSING A COLOR OR TONE, OR PICTURE ROLLS )
  • Navigation unit
  • Harness/connections
  • Rearview camera control unit
  • Rearview camera
Trip computer-no distance Troubleshooting (see TRIP COMPUTER-NO DISTANCE )
  • PCM (speed, fuel level, and fuel pulses)
  • Harness/fuses/switches
Trip computer-no fuel information Troubleshooting (see TRIP COMPUTER-NO FUEL INFORMATION )
  • OK has not been pressed on the disclaimer screen
  • PCM (speed, fuel level, and fuel pulses)
  • Harness/fuses/switches
Trip computer distance to empty calibration is incorrect Troubleshooting (see TRIP COMPUTER DISTANCE TO EMPTY CALIBRATION IS INCORRECT )
  • Fuel gauge operation
  • Trip calibration
  • Characteristic/customer perception
  • F-CAN communication
Navigation cannot control A/C Troubleshooting (see NAVIGATION CANNOT CONTROL A/C )
  • Display unit
  • Non-navigation A/C control unit is installed
  • Harness/fuses/switches
Display day/night mode does not work Troubleshooting (see DISPLAY DAY/NIGHT MODE DOES NOT WORK )
  • Display unit
  • Gauge assembly (CAN)
  • Harness/fuses/switches
System locks up constantly Troubleshooting (see SYSTEM LOCKS UP CONSTANTLY )
  • Navigation unit
  • Wrong color DVD is installed or DVD is dirty or damaged
  • Harness/fuses/switches
  • DVD
Vehicle icon wanders across the map when driving (does not follow a displayed road) or spins when driving Troubleshooting (see VEHICLE ICON WANDERS ACROSS THE MAP (DOES NOT FOLLOW A DISPLAYED ROAD) OR SPINS WHEN DRIVING )
  • Navigation unit
  • GPS antenna/cable
  • PCM (no VSP signal)
Navigation drives by itself when parked Troubleshooting (see NAVIGATION DRIVES BY ITSELF WHEN PARKED )  
Navigation stays on with ignition switch off Troubleshooting (see NAVIGATION STAYS ON WITH IGNITION SWITCH OFF  )
  • Harness/fuses/switches
  • Non OEM assemblies
Navigation frequently asks for anti-theft code and needs GPS initialization Troubleshooting (see SYSTEM INITIALIZATION )
  • Navigation unit
  • Harness/fuses/switches
An In Line Diag screen appears every time the vehicle is started Troubleshooting (see FACTORY DIAGNOSTIC SCREEN "IN LINE DIAG" ) Software remedy, do not replace hardware, search ISIS for current ASB's
White dots tracked across the map See Navigation user's guide for "offroad" tracking (bread crumbs)
  • Non OEM assemblies
  • GPS/antenna/cable
Measurements are displayed in metric See Navigation user's guide for selecting English or metric units