Control Module
The Multimedia module (MMM) has a hard disk and a DVD player integrated in the control module. The DVD player is used to upgrade the software in the Multimedia module (MMM) and transfer map information from the DVD to the hard disk. Using the hard disk obtains the map information quicker and makes storing more data possible. The map information is used for navigation.
The Multimedia module (MMM) has an integrated gyro that manages information about the vehicle's direction of travel.
The multimedia module (MMM) as inputs and outputs for:
- power supply
- ground
- GPS
- TMC
- RGB output to the screen
- MOST network
GPS
Information to the GPS unit consists of signals received from GPS satellites via the GPS antenna.
The navigation system requires at least three satellites to be able to calculate the vehicle's position.
Power is supplied to the GPS unit from the multimedia module (MMM). The GPS unit is integrated in the multimedia module (MMM).
If the GPS signal is diagnosed as missing, the signal should be checked outdoors in an open area as the signal could be blocked if the vehicle is indoors and surrounding buildings could interfere with reception of GPS signals. It can take up to 12 minutes until the GPS signal has been captured and the position has been determined.
TMC
The TMC signal is transmitted from the antenna amplifier and received by the TMC receiver. The TMC signal is managed in the Multimedia module (MMM) and the information is then presented on the display screen.
The TMC receiver is integrated in the multimedia module (MMM).
TMC is a standardized code system for traffic bulletins, such as information on road construction. TMC is only available on certain markets.