Navigation Unit

The navigation unit provides the following functions:

• Controls the display unit, generates graphics images, determines day/night display mode
• Receives input from the Touch screen, and the surrounding "hard buttons" like Menu, and Map/Guide
• Obtains and maintains current position from GPS, Yaw, and VSS signals
• Reads internal DVD, provides map display, and displays current location on map
• Provides turn-by-turn voice guidance to urban and rural destinations, and utilizes a text-to speech engine for reading lists, and other text on the screen. The audio unit provides voice output.
• Interfaces with microphone, steering wheel voice buttons, and audio unit to provide speech recognition control of navigation, Audio, Climate, RES and HFL systems
• Gathers fuel data from PCM for the trip computer feature
• Sets the vehicle clock in the Audio Display, and can automatically compensate for time changes caused by daylight savings or when driving across a time zone boundary (can be disabled in set up)