1999 LAND ROVER DISCOVERY navigation system

CONTENTS
28 CONTENTS
DRIVING AIDS .......................................................................................... 86-8-1
DESCRIPTION AND OPERATION
Park Distance Control – Component Location................................................................................ 86-8-1
Park Distance Control – Control Diagram....................................................................................... 86-8-2
Description ...................................................................................................................................... 86-8-4
Operation ........................................................................................................................................ 86-8-11
REPAIRS
Control unit (ECU) - park distance control (PDC) ........................................................................... 86-8-13
Sounder - parking aid rear ............................................................................................................. 86-8-14
Sensor - parking aid - rear - inner ................................................................................................... 86-8-15
Sensor - parking aid - rear - outer .................................................................................................. 86-8-16
NAVIGATION SYSTEM ............................................................................ 87-1
DESCRIPTION AND OPERATION
Harman/Becker Navigation System Component Location.............................................................. 87-1
Description ...................................................................................................................................... 87-2
DESCRIPTION AND OPERATION
CARiN III Navigation and Trafficmaster System Component Location........................................... 87-12
Description ...................................................................................................................................... 87-14
Operation ........................................................................................................................................ 87-20
REPAIRS
Interface electronic control unit (ECU) - remote control ................................................................. 87-29
Display unit .................................................................................................................................... 87-30
INSTRUMENTS ......................................................................................... 88-1
DESCRIPTION AND OPERATION
Instrument pack .............................................................................................................................. 88-1
Instrument component location - Engine compartment / underneath vehicle ................................. 88-2
Instrument component location - Passenger compartment ............................................................ 88-3
Instrument block diagram ............................................................................................................... 88-4
Description ...................................................................................................................................... 88-5
Interior rear view mirror with compass (where fitted) ..................................................................... 88-42
REPAIRS
Clock ............................................................................................................................................... 88-45
Instrument pack ............................................................................................................................ 88-45

IN CAR ENTERTAINMENT
DESCRIPTION AND OPERATION 86-6-27
Operation
DVD Player Functionality
The following defines the functionality of the unit. Further details of system operation can found in the DVD System
Owner's Manual, Publication Part No. LRL0482, supplied with the system.
DVD Region Selection
The DVD player is capable of playing discs from any region. The DVD can only be set to play discs of one region at
a time. A code is entered using the remote control handset to set the unit to the required region. The unit is set to the
correct region on production and therefore this will not be required by either the dealer or the customer.
If the unit region is required to be changed for any reason, Land Rover Special Vehicles must be contacted for the
required code and procedure.
NOTE: The unit can be re-configured for region up to five times. After the fifth attempt to re-configure the region, the
unit will be locked in the fifth region that was programmed. This will require the unit to be returned to the manufacturer
to be reset. The manufacturer will charge a fee for this service.
DVD Player CD Audio Function
The DVD player can play audio CD's through the vehicle audio system. This allows the user to play additional CD's
without having to remove the CD autochanger cartridge.
The overhead console LCD monitor must be open to play audio CD's.. Normal audio CD functionality such as repeat,
random and track select etc. can be accessed using the remote control handset.
The DVD player in the overhead console will also function independently of the vehicle audio system, and operate as
an additional CD player. The rear seat passengers can listen to audio CD's via the three headphone sockets on the
overhead console and via the two radio/headphone amplifier units (if fitted), while the front seat passengers
simultaneously listen to CD's played on the vehicle audio system and CD autochanger.
DVD/CD Output using the Vehicle Audio System
To play the DVD/CD audio output from the overhead console through the vehicle audio speakers, the speaker button
on the overhead console or remote control handset must be pressed. 'Speaker On' appears on the LCD monitor and
the head unit CD functionality is suspended. The audio output from the overhead console will now be played from the
vehicle speaker system. The head unit volume control, tone control, Navigation announcements and mobile phone (if
fitted) will function as normal and override the DVD output. A second press of the speaker button will switch the audio
output back to the head unit. 'Speaker Off' will be displayed on the LCD monitor.
The overhead console will remember the selected speaker condition if the overhead console is switched off by closing
the monitor, the console switched off using the handset or accessory power removed from the overhead console.
Power Up Conditions
On application of accessory power, the overhead console will perform the following:
lIf no disc is in the DVD player, the LCD monitor will display a blue screen and enter 'AUX' input mode.
When a DVD or CD is inserted in the DVD player, the system will change to DVD input mode. The disc will
attempt to play but may be limited by the disc media. Some discs will play automatically, some will display a menu
and others require the user to start playback.
lIf a disc was in the DVD player and the system was in 'Play', 'Pause', 'FF' or 'Rew' when powered down, playback
will start when power is re-applied.
lIf a disc was in the DVD player and the system was in 'Stop' when powered down, the system will enter DVD
mode and a blue screen will be displayed on the LCD monitor.
lSpeaker selection will remain in the same state as when the accessory power was removed.
Engine Cranking
If the unit is playing a DVD or CD when the ignition switch is moved to position III (engine crank), the system will stop
playing while the engine is cranking. Playback will resume at the point the playback was stopped when the ignition
switch is returned to position I or II.

NAVIGATION SYSTEM
DESCRIPTION AND OPERATION 87-1
NAVIGATION SYST EM DESCRIPTION AND OPERAT ION
Harman/Becker Navigation System
Component Location
1GPS antenna and diplexer unit
2Remote control interface unit3Navigation computer
4Steering wheel switches

NAVIGATION SYSTEM
87-2 DESCRIPTION AND OPERATION
Description
General
The navigation system provides audio and visual route guidance to help the driver reach a selected destination. The
system is an optional fit consisting of a Traffic Pro navigation computer and antenna, manufactured by Harman/
Becker Automotive Systems, which are fitted in place of the In Car Entertainment (ICE) head unit and antenna.
Compact Disc (CD) and radio functions are incorporated into the navigation computer.
The navigation system allows the driver to choose between the shortest and fastest routes between the vehicle's
current position and a selected destination, and to select a stopover point in the journey and a route that avoids
motorways, ferries and toll roads. Directions to Points Of Interest (POI) e.g. airports, hospitals, petrol stations etc,
either local, national or in another country, can also be selected. A traffic jam function enables the driver to request
diversion instructions, around an obstructed part of the selected route, during the journey. A Traffic Management
Control (TMC) function, currently only available in some European countries, monitors traffic broadcasts and
automatically selects an alternative route during the journey if the original route is effected by a traffic jam, accident
or road works etc.
The position of the vehicle is determined by the navigation computer using a combination of vehicle sensor inputs and
radio signals from the 24 Global Positioning System (GPS) satellites orbiting the earth. The position of the vehicle is
then plotted on a digitised map, loaded into the navigation computer from a CD-ROM, to determine the journey route
and provide the route guidance.
The GPS satellite signals are used for initial determination of the vehicle's position and periodic position updates. The
vehicle sensor inputs are used to monitor the vehicle's direction of travel and distance travelled between position
updates from the GPS satellite signals. The vehicle sensor inputs consist of:
lA vehicle speed signal from the ABS ECU, to monitor the distance travelled and for automatic volume control.
lA reverse gear signal from the selector and inhibitor switch of the automatic gearbox, or reverse gear switch of
the manual gearbox, to enable the navigation computer to differentiate between forward and rearward movement
of the vehicle.
lA gyro in the navigation computer, to monitor changes of direction, i.e. steering inputs.
The signal from each GPS satellite contains information about satellite position, almanac data and time (almanac data
is the current status of the satellite). Signals from between five and 11 of the GPS satellites can be received at a given
point on the earth's surface at any one time. The number and quality of separate GPS satellite signals received also
varies with vehicle location. In hilly or tree lined areas, built up areas with tall buildings, multi-storey car parks,
garages, tunnels, bridges and during heavy rain/thunderstorms, signal reception of some or all of the GPS satellites
will be poor or non existent.
A minimum of three separate GPS satellite signals are required for the navigation computer to calculate a three
dimensional (3D) positional fix. When only two signals are being received, the navigation computer will calculate a
less accurate two dimensional (2D) positional fix. The more widely dispersed that the GPS satellites are, the more
accurate the positional fix. The navigation computer can store information from a maximum of 12 GPS satellites at
any one time. When more than three signals are stored, the navigation computer selects the three most widely
dispersed signals for the position calculation.
GPS Antenna and diplexer unit
The GPS antenna is installed at the rear of the roof on the centreline. A diplexer unit on the underside of the GPS
antenna amplifies the radio signals received from the GPS satellites and transmits them through separate dedicated
co-axial cable to the navigation computer for processing.

NAVIGATION SYSTEM
DESCRIPTION AND OPERATION 87-3
Navigation Computer
The navigation computer is installed in the DIN radio slot in the fascia. A spring loaded catch on each side of the
navigation computer secures it in position. Slide tools, installed in slots at the bottom front corners of the navigation
computer, are required to unlock the catches during removal.
The navigation computer contains all the hardware and software required for control of the navigation, radio and CD
systems, including the GPS receiver and a solid state piezo gyro for the navigation system. The piezo gyro measures
the motion of the vehicle around its vertical axis.
The controls for the navigation computer are all located on the front panel of the unit. The centre section of the front
panel hinges to allow access to the CD player and, for security purposes, can be removed from the unit. The controls
perform the following functions:
lOn/Off (ON) button, for switching the unit on and off.
lTone button, for activating the tone menu to adjust bass, treble, balance, fade and loudness functions.
lTraffic Programme (TP) button, for activating the traffic information programme menu (Europe only).
lCompact Disc (CD) mode button, for selecting CD operation.
lRadio (Rad) mode button, for selecting radio operation and tuning menus.
lNavigation (Nav) mode button, for entry and exit of the navigation menu and service mode.
lCD eject button, opens the removable panel and ejects the CD.
lRH rotary control, scrolls through menus when turned and enters a selection when pressed. Also mutes audio
navigation instructions when pressed in navigation mode.
lMultifunction buttons, for entering the security code and menu selections.
lLiquid Crystal Display (LCD), green screen that displays navigation, radio and CD information.
lLH rotary control, adjusts volume when turned. When pressed, restores, repeats or interrupts audio navigation
instructions or provides destination details.
1On/Off button
2Tone button
3Traffic programme button (Europe only)
4CD mode button
5Radio mode button
6Navigation mode button7CD eject button
8RH rotary control
9Release tool slot
10Multifunction buttons
11LCD
12LH rotary control

NAVIGATION SYSTEM
87-4 DESCRIPTION AND OPERATION

Inputs and Outputs
In addition to the vehicle sensor and the antenna inputs, the navigation computer also receives the following:
lA permanent battery feed from the passenger compartment fusebox, to power the navigation function.
lAn ignition switched battery feed from the passenger compartment fusebox, to power the navigation, radio and
CD functions when the ignition switch is in positions I and II.
lAn illumination power feed for switch illumination and LCD backlighting when the exterior lights are on.
Navigation computer outputs consist of those for the ICE system speakers and to the auxiliary CD autochanger, where
fitted.
Security Code
The navigation computer is programmed with a five digit security code selected from numbers 1 to 7. If the battery or
the navigation computer are disconnected, the code is requested on the LCD the first time the navigation computer
is switched on after reconnection; this also occurs if a different removable panel is fitted.
The code is entered using the appropriate multifunction buttons. The navigation computer automatically starts to
operate when the fifth digit of the correct code is entered. If an incorrect code is entered, CODE is displayed on the
LCD to prompt another entry attempt. If an incorrect code is entered three times in succession, WAIT is displayed on
the LCD and the unit is disabled for approximately 60 minutes. If the navigation computer is switched off, the
remaining disabled time will resume when the power is restored.
Automatic Volume Control (AVC)
The AVC feature automatically increases and decreases the audio volume with increases and decreases of vehicle
road speed. The AVC feature, also known as the GAL setting, uses the vehicle speed signal from the ABS ECU and
can be turned off or adjusted to start at a different vehicle speed. The GAL setting is accessed through the User Menu
and can be set to between 0 and +15, where 0 is off and +1 to +15 progressively increase the vehicle speed at which
AVC starts to operate.

NAVIGATION SYSTEM
DESCRIPTION AND OPERATION 87-5
System Settings Menu
The system settings menu provides access to features that can be changed to suit market and personal preferences
and to navigation system operating features. On European systems, the system settings menu also includes
computer games and a currency converter. While the navigation computer is in the navigation mode, the system
settings menu can be accessed by pressing the Nav button. Using the RH rotary control, the following features can
be selected and adjusted:
lTIME – Allows the navigation system clock to be set to local time as opposed to the Greenwich Mean Time (GMT)
transmitted from the GPS satellites. The local time setting is necessary for correct navigation on routes with time
restrictions and for Estimated Time of Arrival (ETA) calculations. The time can only be adjusted in 30 minute
steps.
lSAVE POSITION– Allows the current vehicle position to be saved and allocated a name in the navigation
destination memory.
lGAMES – Provides access to a selection of computer games.
lLANGUAGE– Allows the navigation system language and voice (where applicable) to be changed.
lANIMATIONS– Allows the LCD animations to be switched on and off.
lMEASURING UNIT – Allows the route guidance distances displayed on the LCD to be switched between metric
and Imperial units.
lANNOUNCEMENT ETA – Allows the route guidance ETA announcement to be switched on and off.
lCALCULATE EURO – Provides access to a currency converter.
User Menu
The user menu provides access to further features that can be changed to suit personal preferences. While the
navigation computer is in navigation, radio or CD modes, the user menu can be accessed by pressing and holding
the tone button for more than 2 seconds. The user menu is displayed over two screens, which can be toggled between
using the ⇒ multifunction button. Using the appropriate multifunction button or the RH rotary control, the following
settings can be selected and adjusted:
Screen 1
lGal – Automatic volume control setting (see above).
lTel – If a handsfree telephone system is connected to the navigation computer, allows either mute (telephone
mute mode) or audio signal (telephone conversation via the ICE speakers) to be selected.
lLcd – The LCD can be set to appear negative, positiveor automatic. In automatic, the display will be positive or
negative, depending on the setting of the exterior lamps.
lLed – A Light Emitting Diode (LED) in the display can be set to off or blinking. When set to blinking, the LED
flashes when the navigation computer is switched off.
lM/S – Radio reception can be set to Stereo, Mono or Auto, to suppress interference and reflections and so
optimise reception. Stereo is for exceptionally good reception conditions. Mono is for poor reception conditions.
In auto, the normal setting, the navigation computer automatically switches between stereo and mono depending
on reception conditions.
Screen 2
lNav – Sets how audio navigation instructions are delivered. In onl, other audio sources are suppressed and only
the navigation instruction is output to the speakers. In mixed, the volume of any other audio source is reduced
and the volume of the navigation announcement is the same as the original audio source +/– 6 dB (adjustable).
In independ, the audio source and navigation announcement can be set to independent volume levels.
lAux – Used to switch auxiliary CD AF connections between Aux mode on and Aux mode off. If no CD
autochanger is installed, an external cassette or CD player can be connected to the navigation computer and
powered by switching on the auxiliary CD AF connections.
lCmp – Allows a compass to be shown on the LCD when route guidance is not active.
lBeV – Used to adjust the signal tone volume. Signal tones sound to confirm storage confirmation etc. and can
be set between 0 (quiet) and +5 (loud).

NAVIGATION SYSTEM
87-6 DESCRIPTION AND OPERATION
Service Menu
The service menu provides access to details of the navigation computer hardware and software, and can be accessed
when the navigation computer is in radio mode, by simultaneously pressing the NAV button and the 10 multifunction
buttons. The following items can then be scrolled through by pressing the Nxt (next) and Prv (previous) multifunction
buttons, or turning the RH rotary control:
lModel No.
lSerial No.
lChanger Reset
lGAL
lRadio Software
lRadio Bolo
lNavi Rom
lNavi Flash
lRTC Value
When Changer Reset is displayed, the CD autochanger (where fitted) can be reset by pressing the appropriate
multifunction button.
When the End multifunction button is pressed, the navigation computer quits the service menu and returns to radio
mode.
Garage Menu
Garage menu enables the navigation system to be tested and calibrated, and also contains a route navigation
demonstration. The garage menu is entered from the main navigation menu, as follows:
1Press the Nav button to access the system settings.
2Press and hold multifunction button 3, then press multifunction button 5 to display the garage menu.
The garage menu contains the following, which can be accessed using the RH rotary control:
lCALIBRATION RIDE – Used to calibrate the navigation computer, to enable route navigation.
lGPS INFO– Provides functional test of antenna by checking GPS reception. If functioning correctly, displays the
number of satellites being received, the date, time (Greenwich Mean Time) and the type of positional fix currently
possible.
lCALIBRATION– Allows vehicle specific calibration data to be entered, e.g. tyre size. Also allows current
calibration to be deleted prior to re-calibrating.
NOTE: Only known calibration data should be entered. The navigation computer cannot make route
calculations if incorrect data is entered.
lSENSORS– Allows wheel speed, reverse gear and gyro sensor inputs to be checked.
lVERSION– Displays navigation computer hardware and software details.
lSPEECH TEST– Performs a test of the navigation computer audio output.
lMODULE TEST– Performs a test routine on the internal components of the navigation computer.
lDEMO – Allows a route navigation demonstration to be run.
To quit the garage menu, press the Nav button.