Navigation System Symptom Troubleshooting - Vehicle position icon wanders across the map when driving (does not follow a displayed road) or map vehicle ICON spins
Vehicle position icon wanders across the map when driving (does not follow a displayed road) or map vehicle ICON spins
NOTE:
Check the vehicle battery condition first.
This is not the same condition as when driving off-road (or on a fire or logging road).
This condition is caused by a loss of map matching from a bad sensor input. Check for aftermarket or other objects that can block the GPS signal. Always do the Map Matching before proceeding with the troubleshooting.
Aftermarket metallic window tint or electronic devices located near the audio-navigation unit or GPS antenna can potentially interfere with the operation of the navigation system.
Check the connectors for poor connections or loose terminals.
1.
Problem verification:

Problem verification
?1.
Test-drive the vehicle in an open area, and check if the vehicle position icon displays the actual vehicle position.

Does the vehicle position icon wanders across the map?

     
YES
     
     
     
The failure is duplicated, go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time.?
2.
DTC check:

DTC check
?1.
Check for hard error codes.

Are there any navigation DTCs indicated?

     
YES
     
     
     
Go to indicated DTC's troubleshooting.?
     
NO
     
     
     
Go to step 3.
3.
Determine possible failure area (audio-navigation unit, BACK LT line):

Determine possible failure area (audio-navigation unit, BACK LT line)
?1.
Go into the System Diagnostic Mode, and use the Car Status diagnosis to check the BACK signal.

?2.
Move the shift lever to R.

Does the BACK signal change from [0] to [1] when the shift lever position is changed from P or N to R?

     
YES
     
     
     
     
NO
     
     
     
Go to step 4.
4.
Open wire check (BACK LT line):

Open wire check (BACK LT line)
?1.
Move the shift lever to P or N.

?2.
Press the engine start/stop button to select the OFF mode.

?3.
Disconnect the following connector.

?4.
Press the engine start/stop button to select the ON mode.

?5.
Move the shift lever to R.

?6.
Measure the voltage between test points 1 and 2.
Test condition
ON mode
 
Audio-navigation unit connector G (24P): disconnected
Test circuit
BACK LT
Test point 1
Audio-navigation unit connector G (24P) No. 24 (TAN)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
     
NO
     
     
     
Repair an open in the wire between the audio-navigation unit and the under-dash fuse/relay box.?