Vehicle position icon constantly leaves road, moves erratically, or is displayed very far from actual vehicle position

Vehicle position icon constantly leaves road, moves erratically, or is displayed very far from actual vehicle position

1. Check the GPS icon on the navigation picture.

Is the GPS icon on the map screen?

YES - Do the troubleshooting for GPS icon is white, or not shown.

NO - Go to step 2.

2. Go into the Diagnostic Menu and use the Yaw Rate test to check the yaw rate sensor.
3. Go into the Diagnostic Menu and use the Car Status test to check the vehicle speed pulse.

Are the yaw rate sensor and vehicle speed pulse OK?

YES - The problem may be normal. Check to see if the problem occurs in the same place. If it does, the problem could be in the database. Go to step 4.

NO - If the problem is the yaw rate sensor, replace the navigation unit. If the problem is the vehicle speed pulse, troubleshoot the vehicle speed signal circuit.

4. Substitute a known-good navigation unit and check to see if the problem occurs in the same place.

Does the problem occur in the same place?

YES - The problem is in the database. Report the problem according to the Navigation System Manual under Reporting Errors.

NO - Replace the navigation unit.