Navigation System Symptom Troubleshooting - Navigation drives by itself when parked

Navigation drives by itself when parked NOTE: Always check the connectors for poor connections or loose terminals. Before troubleshooting, get the navigation system anti-theft code. After troubleshooting, re-enter the anti-theft code, and re-initialize the navigation system. Start the engine. From the main menu, select places, then select any destination, and begin the trip. With the vehicle parked, watch the vehicle icon on the display. Does the vehicle position icon move by itself?
YES | - | Replace the navigation unit. ■
NO | - | The system is OK at this time.■