The Japanese version of the navigation system is used for route planning, route information (traffic jams, parking space information, etc.) and for monitoring the route.
GPS Navigation (Global Positioning System): The GPS navigation system pinpoints locations by means of the signals transmitted by satellites. The signals are received by the GPS aerial on the vehicle, processed by the GPS receiver and passed to the navigation computer as latitude and longitude data. The navigation computer uses these to calculate the vehicle position.
Correct operation of the GPS navigation system is only possible when there is an unbroken line of sight between the GPS aerial and at least two GPS satellites. In underground car parks, tunnels, etc. GPS function will be impaired or impossible.
Navigation computer with GPS receiver, hard drive and gyro sensor: The map data (3D map) is located in the hard drive of the navigation computer. The navigation computer combines the vehicle position calculated by the GPS with this map data. The current position is shown on the on-board monitor in the 3D or 2D map.
The driver can enter a destination. The navigation computer calculates a route from the current location to this destination based on selectable criteria (via motorway, no motorway, etc.). The calculated route is shown in the route display.
While the vehicle is being driven, the navigation computer uses the DSC DFAVL signal to calculate the distance driven (direct line from DSC and information in a message via MOST).
An angular velocity meter, known as the ”gyro sensor”, informs the navigation computer about rotary movements of the vehicle (e.g. when turning off etc.). This gyro sensor is fitted in the casing of the navigation computer.
The GPS aerial receives the signals from the satellite. The signals are passed to the navigation computer. The GPS aerial is fitted in the roof-mounted aerial.
The wheel-speed sensor sends signals (DFAVL from DSC) to the navigation computer from which it calculates the distance travelled.
All of the map data the navigation computer needs for route planning is stored on the hard drive. It is advisable to use the latest updated version in order to take account of any changes in the road system.
The picture signals are sent via RGB lines to the video module or directly to the CCC. They are then forwarded to the CID.
The MOST bus serves to transmit audio (sound), navigation signals.
VICS data (traffic jams, accidents, road works, availability of parking spaces, etc.) is received by the VICS receiver via the VICS aerial and FM aerial and transferred to the navigation computer.
The Electronic Toll Collector (ETC) is a control unit for billing road tolls. The ETC is fitted in the inside mirror and connected to the navigation system.