sensor BMW X5 2003 E53 Mk3 Navigation System Manual

Initial Print Date:10/03/00Revision Date:10/24/00
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
Table of Contents
Mk-3 NAVIGATION SYSTEM

4
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
Mk-1 and Mk-2
Navigation Computer
POWERGPSNAVIGATION SYSTEM
ON
CD-INNAVIGATION SYSTEMBMW

5
Mk-3 navigation
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.
Mk-3 computer
GPS antenna
connection18 pin ELO
connectors:
X1313: Violet
X1312: Blue
Integrated GPS receiver and Gyro (rotation) sensor

14
Mk-3 Navigation
Service Mode
Just as Mk-2, Mk-3 provides an on-screen service mode for diagnosis. The service mode
provides five different test screens:
 On-board monitor
 Navigation/Graphic element
 GPS
 Sensor Check
 Telematics
To enter the Navigation Service Mode:
 Turn the ignition key to position 1 (KL R).
 From the Menu screen select “SET”.
 Once in the Set screen, press and hold the “MENU” button for 8 seconds.
 The Service Mode menu will appear on the display.
 Select from the Service Mode menu for navigation specific tests.
Diagnosis
Diagnosis is carried out using Test Modules in the Diagnosis Program as well as on-screen
in the Service mode.The Sensor Check display is intended to be used while test driving the
vehicle. The following pages contain charts with explanations of the Service Mode display.
11.13.2000Thursday10 : 17
INFO
1
4
25
36
FM AM
MODEMENU
TONE SELECT
Language
Distance
Consumpt.
Temp.
Clock
Date
Audio+OBCUSA
miles
mpg
F
12h
mm/dd
off E
km
1/100km km/l
C
24h set
dd.mm set
onSW 3-1/20 SET
11.13.2000Thursday10:17
INFO
1
4
25
36
FM AM
MODEMENU
TONE SELECT
On-board monitor
Video Module
GPS
Sensor check
TelematicsNAVIGATION/GRAPHIC ELEMENT
SERVICE MODE
Press and hold for 8 seconds after entering
the “Set” modeService Mode main menu display
BMWDISB
M
WD
IS
BMWDISB
M
WD
IS
11.13.2000Thursday10 : 17
Wheel sensor:
GPS satellites:
GPS status:
Gyro:
Direction: SENSOR CHECK
return
0
00
Satellite search
02485
Forward

16
Mk-3 Navigation
PDOP Position Dilution of Precision
HDOP Horizontal Dilution of Precision
VDOP Vertical Dilution of Precision
S/N Signal/noise relationship
Gyro Piezo gyro sensor (in navigation computer)
Dir Direction of travel
Menu Display Explanation
GPS/Status







GPS/Tracking
info G-speed
Heading
Rec status
Pos-src
PDOP
HDOP
VDOP

CH
PRN
S/N
Visible Sat


Almanac Relative speed over the ground
Direction of travel
Search/track/position receiver status
Number of satellites available for analysis
Accuracy of the calculated location
<8=sufficient determinations of location
<4=very good determinations of location

Channel
Satellite detection
Better reception as the value increases
Number of visible satellites, receivable
Signals, depending on time of
day/configuration
Satellite database, loaded automatically after
15 minutes
Telematics VIN
Color
GSM
BMW info
Emergency call out
Initialization
Logging off VIN (Automatically assigned during coding)
Color code or text
Telephone network/contract number
Customer specific info
On/off status
Telematics services on/off status
Logging off telematics services

17
Mk-3 navigation
Review Questions
1. List the most signoficant changes made to the Mk-3 navigation computer over the
previous Mk-2.
2. How can the signal provided by the gyro sensor to the navigation computer be
checked?
3. Describe how the display signals are transmitted from the navigation computer to the
MIR and board monitor.
4. What step is necessary before loading the navigation computer operating software CD
on a newly replaced navigation computer? Where can the software status be confirmed
after it has been loaded?
5. How is the VIN entered into the navigation computer?