Navigation System

WARNING: This page is about a different car, the 2005 Lincoln Navigator and 2005 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

The navigation system is integral to the audio unit. The audio unit controls the operation and interface between the user, the vehicle subsystems, and the external components. A map compact disc (CD) stored in the audio unit visually guides the user through the maneuvers required to arrive at the destination entered.

In order to calculate initial vehicle position, a global positioning system (GPS) antenna is used to track several available satellites simultaneously. The GPS antenna only receives data; it does not communicate with the satellites. A hardwired reverse input from the digital transmission range (TR) sensor and a hardwired vehicle speed input from the anti-lock brake system (ABS) module are also used to improve the accuracy of the navigation system.