Controls | These Eliminate Divisions |
|---|---|
Band | Changes between AM/FM1/FM2/WX |
CD | Displays the CD control screen |
Tune/Seek | Allows the system to tune to the next preprogrammed station or to seek stations in the area |
Adjust | Displays the audio adjust screen |
Repeat | Press to repeat the last voice guidance |
Map | Press to enter map mode |
Route | Initiates the route planning routine |
Setup | Press to change system settings |
Tilt | Press and hold to access map DVD |
Navigation System Components
The navigation system contains the following components:
| • | The navigation radio |
| • | The global positioning system (GPS) antenna |
The export navigation system (UZD) contains the following additional components:
| • | The vehicle information communication system (VICS) microprocessor card |
| • | The VICS optical/microwave beacon antenna |
| • | The VICS FM antenna integrated into the rear declid |
Navigation Radio
This component acts as the operator interface for the navigation system, provides the data input from the operator to the navigation system and provides navigation information to the operator via the display screen. The navigation radio is located in the center of the instrument panel. The navigation radio provides the following:
| • | A display screen. All navigation and audio functions are displayed on this screen. |
| • | Soft key buttons on the display to allow selection from menus and to operate the navigation and audio systems. |
| • | The navigation system map with routing information displayed on the navigation radio screen. |
| • | Provides verbal guidance to the operator. |
| • | Receives vehicle speed input from the engine control module (ECM). |
Global Positioning System (GPS)
The global positioning system (GPS) system collects position information for GPS satellites in orbit around the earth. Initial vehicle position is determined by the comparison of the signals received from multiple GPS satellites. The GPS antenna must have a clear unobstructed view of the sky and receive signals from three or more GPS satellites to display accurate position information. Current position is displayed on the navigation display touch screen as a carat. The vehicle speed signal received from the body control module (BCM) and accelerometers in the navigation radio are used to continuously change the position of the vehicle as the vehicle is driven. The GPS system will continuously update ensure the correct position is shown.
Voice Recognition
The navigation system can utilize voice commands from the operator to control many functions of the radio. The voice recognition microphone is located above rear view mirror. In domestic vehicles this microphone is shared with the Onstar® system. The microphone signal is then routed to the Onstar® voice communication interface module (VCIM) then to the navigation radio where the signal is processed and the command is performed. In export vehicle the signal from the microphone is routed directly to the navigation radio. For a complete list of all available voice commands refer to the navigation supplement.
VICS Module - Export
The vehicle information communication system (VICS) card, an export only dealer-installed option, is installed inside the navigation radio. The VICS card uses signals from the optical/microwave beacon antenna and the right radio antenna module to convey routing information to the NAV. The NAV either revises planned routing or relays the VICS information to the operator through the screen of the navigation radio and the voice guidance system.
