10
Mk-3 Navigation
Principle of Operation
The Global Positioning System is a satellite based system developed by the US Department
of Defense that provides both military and civilian users accurate information about
location.
The GPS system uses 24 satellites in six
orbits 12,550 miles above the Earth mov-
ing at 1.7mi per second. Usually 7 to 10
satellites are in view over any one point on
the earth.
The GPS satellites are basically extremely
accurate clocks that broadcast a coded
signal representing time. The GPS receiver
determines it’s distance from the satellite
by measuring the time it takes between
satellite transmission of the signal and
reception to the receiver. The receiver
does this with at least 2 other satellites and
uses the information to determine the vehi-
cles latitude, longitude, and altitude. The
accuracy of the system for civilian use is
within 100m (300ft).
The vehicle must have an unobstructed view of the sky to receive the maximum amount of
satellite signals. Trees, large buildings and excessive cloud cover can block the reception
of the satellites’ transmissions.
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
