1999 LAND ROVER DISCOVERY display

AIR CONDITIONING
DESCRIPTION AND OPERATION 82-19
Diagnostics
The ATC ECU performs a diagnostic check each time the ignition is switched on. To avoid nuisance fault indications
at low light levels, the sunlight sensor is omitted from the diagnostic check. If a fault is detected, the audible warning
sounds three times and the AUTO window on the control panel display flashes for 20 seconds. The ATC ECU then
reverts to normal control but uses a default value or strategy for the detected fault. Faults are identified by performing
a manual diagnostic check of the system.
A manual diagnostic check includes a check of the sunlight sensor, and is initiated by pressing and holding the AUTO
switch and the air distribution switch, then turning the ignition switch from off to on. The audible warning sounds once
and the indications on the control panel display illuminate. FC is shown in the LH temperature window and the results
of the check are shown as a two digit fault code in the RH temperature window. If a fault is detected, the audible
warning sounds three times and the AUTO window on the display flashes on and off for 20 seconds. If more than one
fault is detected, the fault codes cycle in numerical order, at 1 Hz. The audible warning sounds as each fault code is
shown. In low light conditions, to avoid false sunlight sensor fault indications, the sunlight sensor should be illuminated
with a strong light source.
Diagnostic fault codes and fault descriptions
Code Component Fault Default value/strategy
00 - No fault found -
11 In-car temperature sensor Open or short circuit 25°C (77°F)
12 Ambient temperature sensor Open or short circuit 10°C (50°F)
Cooling fan permanently on
Display shows "- -" if external air
temperature selected
13 Thermistor Open or short circuit 0°C (32°F)
14 Heater coolant temperature sensor Open or short circuit 70°C (158°F)
21 Sunlight sensor, left output Open or short circuit No solar heating correction
22 Sunlight sensor, right output Open or short circuit No solar heating correction
31 LH temperature servo motor Open or short circuit
Motor or flap mechanism seizedServo motor locked in position
32 RH temperature servo motor Open or short circuit
Motor or flap mechanism seizedServo motor locked in position
33 Distribution servo motor Open or short circuit
Motor or flap mechanism seizedServo motor locked in position

BODY CONTROL UNIT
DESCRIPTION AND OPERATION 86-3-15
Electric seats
The BCU controls the logical operation of the electrically operated front seats. Two modes of operation are available:

+ SEATS, DESCRIPTION AND OPERATION, Description - electric seats.
lElectric seat adjustment is enabled if the ignition is on or the driver's door is opened for a short time period.
lElectric seat adjustment is enabled if the ignition is on and the driver's door is closed.
The seats are operated by four electric motors which control the seat cushion rear up/ down, the seat cushion front
up/ down, seat cushion forward/ rearward and seat squab recline. The electrically powered lumbar adjustment in each
seat is operated by a single motorised air pump and a solenoid located on the seat squab frame. The air pump inflates
a cushion in the seat squab and the solenoid operates a valve to deflate the cushion. The seat squab and cushion
may also contain heater elements to provide heated seat operation.
The switches for electrically operated seats are located either side of the centre console.
Direction indicators and hazard warning lamps
The direction indicator lamps are operated from a three position direction indicator switch on the left hand, steering
column stalk. The BCU only allows the lamps to work as direction indicators when the ignition switch is in position II.
The BCU also controls the lamps to operate as hazard warning lamps and as a visual warning for the anti-theft system,
in which cases all lamps flash simultaneously irrespective of the ignition switch position.
System control of the direction indicators and hazard warning lamps is provided by the BCU operating with the IDM
and two electronic relays located in the passenger compartment fuse box. The IDM and relays are integral parts of
the passenger compartment fuse box and cannot be serviced individually. The serial data bus is used for
communication of status and operation requests between the BCU, IDM and instrument pack.
The hazard warning lamps are operated from a latching pushbutton switch located on the fascia.
All direction indicator/ hazard warning lamp bulbs are rated at 5 Watts.
Headlamps
The BCU contains a feature which allow the vehicle headlamps to be turned on when the remote transmitter is
pressed (courtesy headlamps).
For markets with daylight running lamps, the BCU controls the logical operation of the daylight running lamps. Options
are daylight running lamps are on if the main beam headlamps are off, or the daylight running lamps are on with main
and dipped beam off and the gearbox not in Park.
Front fog lamps
For markets with front fog lamps fitted, the BCU controls the operation of the front fog lamps. Options can be selected
so that the fog lamps will operate with or without the headlamps on main beam.
Instrument pack
The BCU communicates with the instrument pack via a serial data bus.

+ INSTRUMENTS, DESCRIPTION AND OPERATION, Description.
lThe instrument pack provides the BCU and IDM with details of vehicle speed.
lSignals are provided from the IDM to the instrument pack and BCU when the direction indicator lamps are active.
lFor certain markets, the BCU provides a signal to the instrument pack for indicating when the transfer box is in
neutral.
lThe IDM can signal the instrument pack to illuminate a trailer warning lamp. This operates when the IDM senses
that the current drawn by the indicator circuit exceeds a preset threshold.
lThe odometer reading displayed on the instrument pack LCD screen is also stored in non volatile memory in the
BCU. Whenever the ignition is turned from position I to position II, the instrument pack and the BCU compare
their stored values.
lThe gear selector position is displayed on the instrument pack LCD screen under the direction of the BCU.
Starting
The starting system comprises a starter motor and solenoid located at the rear right hand side of the engine. A starter
relay controlled by the BCU is used to supply battery power for starter solenoid operation. The starter motor receives
its feed directly from the battery.

IN CAR ENTERTAINMENT
86-6-4 DESCRIPTION AND OPERATION
Description
General
The in car entertainment (ICE) system allows the driver and passengers to listen to audio output from the speakers
or optional headphones inside the vehicle. Buttons or knobs on the radio cassette allow changes of levels or
selections during the various modes of operation. The system can be controlled from the fascia mounted radio
cassette, or optional remote control switches on the left hand side of the steering wheel. High line systems may also
have rear headphone amplifiers that have some control of the system via the radio cassette player.
One or two amplified aerials located in the rear side windows send radio signals to the radio cassette player. On high
line systems a power amplifier and a CD-autochanger may be located under the front seats. Speakers are located in
the lower door panels, additional speakers may be located in upper door trim, the A-post and the tail door. A display
screen shows the user the current system status.
The ICE supplied varies with trim level and market. Vehicles may not have all of the speakers, amplified aerials, CD-
autochanger, rear headphone amplifiers or power amplifier.
Base system radio cassette
The base radio cassette has buttons for LD (loudness) AM, FM, EJECT (tape), Reverse, Base/Balance, treble, MAN
forward and reverse. The base radio cassette is located in the center of the fascia and contains the radio and tape
player, four clips (accessible through holes in the front of the unit) secure the unit in the fascia. To remove the unit
the four clips must be released with a special tool. The base system can be controlled from the fascia mounted radio
cassette. A logic control circuit in the radio cassette player controls the operation in the various control modes.
The radio cassette has a display screen, the information shown can be the current radio frequency, tape operating,
bass or loudness settings. Power for the illumination on the radio cassette is supplied from the passenger
compartment fuse box. A main fuse is also located in the connector socket area on the back of the radio cassette.
Security code function
A combination of buttons on the radio cassette are used to input and change security codes. Security codes make the
unit unusable if the unit is disconnected from the vehicle without deactivating the security code. The radio cassette
has an internal memory chip that stores the code information, if the power is removed from the unit the chip will
activate the security code feature. For this reason the security code feature must be deactivated before the unit is
removed or the vehicles battery is disconnected.
Audio functions
The radio cassette has buttons for the following audio functions: LD (loudness), bass/balance, fader, treble and
volume.
Cassette functions
The radio cassette has buttons for the following cassette functions: eject, forward, reverse and tape reversal.
Multi function buttons
The function of presets 1-6 and the MAN button depends on current mode of operation and allows selection of radio
band, radio on, tape track and search/seek functions. The MAN button is mode dependent, when pressed the button
allows manual operation or alternate mode selections such as manual tuning.
Internal memory
An internal memory chip stores the station presets and security code, power is supplied internally to the chip via a
permanent power feed, supplied from the passenger compartment fuse box.

IN CAR ENTERTAINMENT
86-6-6 DESCRIPTION AND OPERATION
Midline system radio cassette
The midline radio cassette is located in the center of the fascia and contains the radio and tape player, four clips
(accessible through holes in the front of the unit) secure the unit. To remove the radio cassette unit the four clips
must be released with a special tool. The midline system can be controlled from the fascia mounted radio cassette,
or from remote radio control switches on the left hand side of the steering wheel. The audio signal can be from the
radio, cassette player or a optional CD-autochanger. A logic control circuit in the radio cassette player controls the
operation in the various control modes.
The radio cassette has a display screen, information shown can include current status, station (radio mode) or
cassette tape track or (optional) CD-autochanger track/disc status. Power for illumination on the radio cassette is
supplied from the passenger compartment fusebox. A main fuse is also located in the connector socket area on the
back of the radio cassette.
Security code function
A combination of buttons on the radio cassette are used to input and change security codes. Security codes make the
unit unusable if the unit is disconnected from the vehicle without deactivating the security code. The radio cassette
has an internal memory chip that stores the information, if the power is removed from the unit the chip will activate the
security code feature. For this reason the security code feature must be deactivated before the unit is removed or the
vehicles battery is disconnected.
Audio functions
A rotary knob allows changes of levels or selections during the various modes of operation, this includes volume,
bass, treble and fader.
Cassette functions
The radio cassette has buttons for the following cassette functions eject, tape, reverse, forward, tape eject/reversal.
Radio functions
The radio cassette has buttons for the selection of AM or FM reception. Selection of the radio station is controlled by
the use of the multi-function buttons on the radio cassette player, the radio headphone amplifiers or the remote radio
controls on the steering wheel.
Traffic information and news function
A traffic information button (TA/NEWS) allows traffic or news information to be selected on the FM waveband only, in
this mode the audio output will mute when traffic or news messages are received. After the traffic or news message
the radio, cassette tape or CD will resume play, the traffic and news information varies with the country of use and
radio band selected.
C0922 (high line systems)
7 Radio headphone active Input
8 I-BUS communications Input/Output
9 Audio amplifier spatial imaging enable Output
10 Radio headphone LH remote control Input
11 Radio headphone RH remote control Input
12 Headphone remote controls feed Output
C1354 (high line systems)
13 CD-autochanger audio left channel Input +
14 CD-autochanger audio right channel Input +
15 CD-autochanger audio earth Output
16 CD-autochanger audio left channel Input -
17 CD-autochanger audio right channel Input -
18 Not Used
19 CD-autochanger I-BUS communications link Input/Output
20 CD-autochanger permanent feed Output

IN CAR ENTERTAINMENT
DESCRIPTION AND OPERATION 86-6-7
Multi function buttons
Rotary controls are located on the front of the radio cassette for adjustment of bass, treble etc, depending on current
mode selected. Operation of presets 1-6 depends on current mode of operation and allows selection of radio band
(Radio mode on) or CD-autochanger disc (in the CD mode). Scan (Mode dependent) manual or automatic selection
of band or track. RND random play, MODE/MUTE (mode dependent) when pressed the button allows manual
operation or alternate mode selections such as manual tuning, compact disk cue/review, tape forward/rewind modes.
Internal memory
An internal memory chip stores the station presets and security code, power is supplied internally to the chip via a
permanent power feed, supplied from the passenger compartment fuse box.
High line system radio cassette
The high line radio cassette is located in the center of the fascia and contains the radio and tape player. Two clips
(accessible through slots in the front of the unit) secure the unit. To remove the radio cassette unit the two clips must
be released with a special tool. The high line system can be controlled from the fascia mounted radio cassette, or from
remote radio control switches on the left hand side of the steering wheel. In vehicles fitted with radio headphone
amplifiers, the rear seat passengers can control their individual audio output using a headphone amplifier control
panel. The audio signal can be from the radio, cassette player or a CD-autochanger. A logic control circuit in the radio
cassette player controls the operation in the various control modes.
The radio cassette has a display screen, information shown includes current status, station (Radio mode) , CD-
autochanger track/disc status or status of headphone amplifier. Power for illumination on the radio cassette is supplied
from the passenger compartment fusebox. A main fuse is also located in the connector socket area on the back of
the radio cassette. When the radio cassette switch is on, power is made available via internal circuits to the radio
headphone amplifiers.
Security code function
A combination of buttons on the radio cassette are used to input and change security codes. Security codes make the
unit unusable if the unit is disconnected from the vehicle without deactivating the security code. The radio cassette
has an internal memory chip that stores the information, if the power is removed from the unit the chip will activate the
security code feature. For this reason the security code feature must be deactivated before the unit is removed or the
vehicles battery is disconnected.
Audio functions
A rotary knob allows changes of levels or selections during the various modes of operation, this includes volume,
bass, treble, fader and spatial on/off.
Cassette functions
The radio cassette has buttons for the following cassette functions; eject, fast forward, rewind and dolby. The dolby
symbol is shown on the dot matrix display screen if dolby mode is selected.
Radio functions
The radio cassette has buttons for the selection of AM or FM reception. Selection of the radio station is controlled by
the use of the multi-function buttons on the radio cassette player, the radio headphone amplifiers or the remote radio
controls on the steering wheel.
CD-autochanger functions
The CD button on the radio cassette player allows selection of the CD-autochanger. CD disc and track selection is
controlled by the use of the multi-function buttons on the radio cassette player, the radio headphone amplifiers or the
remote radio controls on the steering wheel.
Traffic information function
A traffic/news information button (I) allows traffic or news information to be selected on the FM waveband only, in this
mode the radio will mute when traffic or news messages are received. After the traffic or news message the radio,
cassette tape or CD will resume play, the traffic and news information varies with the country of use and radio band
selected.

IN CAR ENTERTAINMENT
86-6-16 DESCRIPTION AND OPERATION
Description
General
The DVD entertainment system can be fitted by Land Rover Special Vehicles as an original equipment system on the
Adventurer model or can be supplied as an accessory for fitment by the dealer. The system can be fitted to all
Discovery Series II models.
NOTE: The DVD system cannot be fitted to vehicles fitted with a Visteon single slot CD head unit.
The fitment of the system to vehicles manufactured before 2002 model year requires a different wiring harness and
connector plugs to vehicles from 2002 model year. Full details of components required for specific vehicles is
contained in the DVD System Accessory fitting instructions (Part No. STC 61947/61946).
The system comprises a main wiring harness, a lower wiring harness, CD switch box with integral noise filter, CD
switch harness, remote control handset and an overhead console containing the Liquid Crystal Display (LCD) monitor
and Digital Versatile Disc (DVD) player.
The system can play DVD films and display them on the LCD screen. The DVD audio can be played over the vehicle
audio speaker system or on headphones connected directly to the overhead console. The system can also function
as a second CD player. Rear seat occupants can listen to a CD in the overhead console via headphones, whilst the
remaining vehicle occupants can listen to CD's played from the CD autochanger in the normal way.

IN CAR ENTERTAINMENT
86-6-18 DESCRIPTION AND OPERATION
The console unit has three buttons which allow for minimum operation of the unit without using the handset:
lThe Stop/Eject button stops playback when pressed – 'Stop' appears on the LCD monitor as confirmation.
When the playback is stopped, a further press of the Stop/Eject button ejects the DVD or CD from the DVD
console – 'Eject' appears on the LCD monitor as confirmation.
lThe Play/Pause button begins play of the DVD or CD when pressed – 'Play' appears on the LCD monitor as
confirmation.
During play, pressing the Play/Pause button temporarily pauses the play – 'Pause' appears on the LCD monitor
as confirmation. A second press of the Play/Pause button resumes the play.
lThe Speaker button switches the DVD or CD audio to play through the vehicle audio speakers system. When the
CD is selected on the ICE head unit in the fascia, pressing the button allows the DVD or CD audio to play through
the vehicle audio speakers – 'Speaker On' appears on the LCD monitor. A second press of the button prevents
the DVD or CD audio playing through the vehicle audio speakers – 'Speaker Off' appears on the LCD monitor.
NOTE: These functions are also available from buttons on the remote handset.
Two sockets are provided on the left hand side of the unit and one socket on the right hand side of the unit for the use
of headphones with the overhead console unit. This allows the three occupants of the 2nd row seats to listen to the
DVD output using headphones. Occupants of the 3rd row seats can also listen to the DVD output using headphones
connected into the two radio/headphone amplifier units.
The console has three Phono sockets which allow for the use of an auxiliary video unit or video games console to be
connected to the system and use the LCD monitor for display. The sockets are colour coded for correct auxiliary input
connection as follows:
lRED – Right channel audio input
lWHITE – Left channel audio input
lYELLOW – Video input.
A slot is provided on the right hand side of the console for insertion of a DVD or CD into the console unit. The DVD
or CD can be inserted into the slot with the label side facing upwards. The DVD or CD is ejected from the slot when
the Stop/Eject button is pressed.
When the LCD monitor is in the lowered position, an infra-red receiver is exposed and receives transmitted signals
from the remote control handset. The receiver is located adjacent to the status LED which is illuminated when the
system is active.
The DVD player in the overhead console has an auto eject feature to protect the DVD or CD in the unit from damage
due to excessive heat. The status LED will flash to alert the user to this condition. If the temperature exceeds 70°C
(158°F), the DVD system automatically ejects the DVD or CD and shuts down, preventing further operation. When
the temperature in the vehicle has returned to 64°C (147°F) or less, press the 'Power' button on the handset or open
the LCD monitor to switch on the system.
Liquid Crystal Display (LCD) Monitor
The LCD monitor is suited for use with the in-car DVD system because of its compact, lightweight design and low
power consumption. The LCD monitor is a highly sophisticated unit and should be treated with care. Observe the
following precautions when using or handling the LCD monitor.
lDo not press on the monitor, this can distort the picture and cause permanent damage to the LCD panel.
lClean the LCD panel with a damp soft cloth with a mild household detergent if necessary. DO NOT use solvents,
commercial cleaners or anti-static sprays.
lDo not use the LCD in temperatures below 0°C (32°F) or above 80°C (176°F). If the vehicle is used in a cold
climate or in direct sunlight in a warm climate, the LCD monitor may not function correctly outside of the
temperatures stated. The picture may not be clear. This will not cause permanent damage to the monitor and the
picture should return to normal once the temperature is within the operating range as stated.

IN CAR ENTERTAINMENT
86-6-26 DESCRIPTION AND OPERATION
Connector C05
Connector C05 is located passenger compartment fusebox and supplies power and ground to CD switch unit.
Electrical Supply
The complete system is connected via a connection in the passenger compartment fusebox. A plug is connected to
an auxiliary socket in the fusebox and supplies the ground, accessory power and permanent battery power supplies
to the system via the CD switch and main DVD harness.
The system is connected by two fuses in the passenger compartment fusebox as follows:
lFuse 15 (20A) – Auxiliary power supply
lFuse 27 (15A) – Permanent battery supply.
CAUTION: Always replace fuses with a fuse of the correct Amperage rating.
Voltage Protection System
The DVD system has a voltage protection system to protect the vehicle battery from further loads if battery voltage is
low or to protect the DVD system if the battery voltage is high.
If the battery voltage falls to 11 volts or below, the system will shutdown to protect the battery from further drain. A
message 'Voltage Error shutdown' will appear in the LCD monitor before the system shuts down. When the battery
voltage reaches 11.5 volts or above, the system will restart when the power button on the remote control handset is
pressed.
If the battery voltage exceeds 17 volts, the system will shutdown to a low voltage 'dormant' mode to protect the system
from excessive voltage. A message 'Voltage Error Shutdown' will be displayed in the LCD monitor before the system
shuts down. When the voltage has fallen to 16.5 volts or lower the system will restart when the power button on the
remote control is pressed.
Pin No. Description Input/Output
1 Main ground Input
2 Not used–
3 Accessory power supply Input
4 Battery power Input
5 Not used–