4%20%20MK%203%20navigation%2010-30-00, BMW educational info, Dokumentacja

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Table of Contents
Mk-3 NAVIGATION SYSTEM
Subject
Page
Purpose of the System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
System Components
Navigation Computer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
GPS Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Gyro Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
GPS Antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Display Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Information/Body Bus Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Video/Audio Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Speed Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Reverse Gear input.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Principle of operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Workshop Hints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Review Questions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Initial Print Date:10/03/00
Revision Date:10/24/00
Mk-3 NAVIGATION SYSTEM
Models: E38, E39, E46, E52, E53
Production Date: E46 from 6/00, all others from 9/00
Objectives
After completing this module you should be able to:
• Recognize the changes to Mk-3 from the previous Mk-2 navigation system.
• Identify the components used in the system.
• Review the operating fundamentals of GPS navigation.
• Describe how to properly code and program the Mk-3 computer.
Mk-3 Navigation
Purpose of the System
The Mk-3 navigation system is a factory installed navigation system that replaces the
previous Mk-2 version. The purpose of the system remains the same as previous
navigation systems: To provide the driver with navigation instructions to an entered
destination based on the vehicles current position and the roads available selected from
a digitized road map.
The principle differences of the Mk-3 system over the previous Mk-2 are:
• GPS receiver is integrated into the MK-3 computer.
• Optimized memory and faster processor resulting in faster start-up and operation.
• New split screen and magnifying feature when equipped with wide screen monitor.
(software feature)
• Same navigation computer used for color board monitor or monochrome MIR display
units.
3
Mk-3 navigation
 System Components
Mk-3 Navigation Computer
The Mk-3 navigation computer is located in
the left side of the vehicles trunk or cargo area.
(In the case of the Z8 it is installed in the stor-
age box behind the passenger seat.)
The navigation computer housing contains:
• Map CD drive
• Hardware for navigation function
• GPS receiver
• Gyro sensor
• Output for audio interface
• Output for visual display
• Cooling fan for unit
There are two different hardware versions available dependent on the angle of installation
in the vehicle (horizontal or vertical). The Mk-3 is compatible with both board monitor or
MIR display units.
(See workshop hints for configuration instructions)
Identification of the Mk-3 computer over the previous versions is easy due to a change in
the face plate design and the elimination of the “CD-IN” LED.
Mk-3 Navigation
Computer
POWER
GPS
NAVIGATION SYSTEM
Mk-1 and Mk-2
Navigation Computer
ON
CD-IN
BMW
NAVIGATION SYSTEM
Mk-3 Navigation
  Mk-3 computer
GPS antenna
connection
18 pin ELO
connectors:
X1313: Violet
X1312: Blue
Integrated GPS receiver and Gyro (rotation) sensor
GPS (Global Positioning System) Receiver
The GPS receiver module of the previous Mk-2 system is integrated into the housing of the
Mk-3 computer, further reducing the complexity and the number of components used in
the system. The receiver is not serviceable.
The GPS receiver is responsible for receiving the satellite signals and providing the vehicle’s
position information to the navigation computer.
Information provided by the GPS receiver to the navigation computer can be displayed in
the service mode
(see workshop hints)
but is not typically used in diagnosis.
Gyro (Rotation) Sensor
The navigation computer contains the electronic (piezo) Gyro sensor that detects rotation
(yaw) of the vehicle as a confirmation that the vehicle is turning. The signal provided by the
gyro is a mili-voltage that changes as the vehicle rotates. The navigation computer uses
the input to track the vehicle along the digitized map and display the exact vehicle position.
The signal is available in the sensor test page of the service mode for diagnosis. The
sensor is not a separately serviceable item and does not require calibration.
5
Mk-3 navigation
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