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On-Board Monitor and Navigation Systems
Information/body bus Interface
The navigation computer is integrated into the vehicle bus system as its main communica-
tion link with the vehicle.
Communication occurs with the following modules:
BMBT - Control inputs
Radio - Display data
GM - Door open
IKE/Kombi - On-board computer data
Telephone PSE Box - Monitor display data, mayday function
DISplus - Coding data
PSE = Portable Support Electronics
Video/Audio Signals
Board Monitor (Top Navigation)
The RGB video signal for all display functions of the board monitor are produced by the
navigation computer graphics stage via three output signals. The Red-Green-Blue signals
are direct inputs to the board monitor. The audio signals for navigation instructions to the
radio are sent via two separate lines.
MIR (Radio Navigation)
Since a color display is not used for the MIR, the navigation information for the display is
sent via a NAV bus. The NAV bus is a single dedicated line between the Mk-3 computer
and the MIR. Audio signals for navigation instructions are sent to the radio via two
separate lines.
Aux. Ventilation
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