Principles of Operation

PRINCIPLES OF OPERATION

Navigation System
The navigation module is integrated in the audio unit and controls the operation and the interface between the user, the vehicle subsystems, and the external components. The navigation audio unit is on the medium speed controller area network (MS-CAN) and can be diagnosed with a scan tool.

The vehicle navigation system guides the user to a pre-entered destination. A map digital versatile disc (DVD) stored in the navigation audio unit is used for calculating the vehicle course. The audio unit display audibly and visually instructs the user of the maneuvers required to arrive at the destination entered.

A voice recognition system allows the user to interface with the system without using the touch screen. A microphone located in the rear view mirror provides a direct input to the navigation module.

In order to calculate initial vehicle position, the global positioning system (GPS) antenna is used to track several available satellites simultaneously.

The vehicle speed signal (VSS) and transmission gear selected signal are received by the navigation audio unit through the MS-CAN. These signals are used to increase the accuracy of the displayed course.