Global Positioning System
The navigation system receives GPS information via the GPS antenna. The GPS signals are used by the navigation system to calculate the vehicle's position. Once the driver has input a desired destination, the navigation system can calculate a route, based on the driver's pre-determined preferences or the default settings in the navigation system
The navigation system is accessed from the Touch Screen (TS) home menu.
Navigation is initiated by the driver inputting a destination. This can be achieved by:
- Entering an address using the TS
- Entering a post code
- Choosing a previous destination
- Choosing a point of interest from the map disc database
- Choosing the home location
- Choosing a memory stored location.
The driver is then guided to the destination by a scrolling map display and voice guidance. The display can be varied by scale and display type.
Selection of 'Navigation' on the TS home menu and subsequent submenu selection sends a control request signal to the IAM for Rest Of World (ROW) markets or navigation computer (Japan only) on the Media Oriented Systems Transport (MOST) ring. In Asia markets the TS control request is passed to the navigation computer via the medium speed CAN bus. The requested control information is processed by the Integrated Audio Module (IAM) for ROW or navigation computer for Japan and Asia only.
On ROW vehicles, if voice guidance is operational, the voice signals are passed from the IAM to the AAM on the MOST ring for output on the speaker system.
On Japan vehicles, if voice guidance is operational, the voice signal information is relayed from the navigation computer on the MOST to the audio AAM for output on the speaker system.
On Asia vehicles, if voice guidance is operational, the voice signal information is relayed from the navigation computer, via an analogue audio signal to the IAM. The IAM converts the analogue signals which are then passed to the audio AAM on the MOST ring for output on the speaker system.
The navigation audio output is through the front speakers while the background audio, for example radio or CD (compact disc), is played at a reduced volume on the rear speakers. On Asia systems the radio or CD output is paused while navigation audio output is operating.
The GPS signal is available to the navigation system at all times when the vehicle ignition is switched on.
Navigation user voice commands are made using the Land RoverVoice system. The TS processes the analogue signal from the Land RoverVoice switch. This is passed from the TS onto the MOST system to the Land RoverVoice control software which is integral with the IAM (ROW) or navigation computer (Japan). Land Rover Voice control of the navigation system is not available on Asia specification vehicles.
For the Japan system, the analogue voice signals are relayed from the IAM via the MOST ring directly to the navigation computer (for processing). Navigation commands are handled internally within the navigation computer without the need for communicating with the TS for control.
Traffic data from the TMC or the VICS is processed by the IAM or navigation computer (Japan only), distributed to the TS with any supporting voice instruction relayed through the MOST ring to either the IAM or AAM, dependant on equipment level.