1995 LAND ROVER DISCOVERY radio

MAINTENANCE
17
MAINTENANCE
CHECK/TIGHTEN FRONT AND REAR AXLE
SUSPENSION LINK FIXINGS, CHECK CONDITION
OF MOUNTING RUBBERS
DRAIN FUEL SEDIMENTER - Tdi
Fuel sedimenter
The sedimenter is attached to left-hand side of
chassis frame near fuel tank. It increases the working
life of the fuel filter by removing larger droplets of
water and larger particles of foreign matter from fuel.
Drain off water
1.Loosen drain plug, allow water to run out.
Tighten plug immediately pure diesel fuel starts
to flow.
RENEW FUEL FILTER
WARNING: Ensure that fuel handling
precautions given in Section 01 -
Introduction regarding fuel handling are
strictly adhered to when carrying out following
instructions.
See INTRODUCTION, Information,
Fuel Handling Precautions
WARNING: The spilling of fuel is
unavoidable during this operation. Ensure
that all necessary precautions are taken to
prevent fire and explosion.
1.Depressurise fuel system.
See FUEL SYSTEM,
Repair, Depressurising Fuel System
2.The fuel line filter is located on right hand
chassis side member forward of fuel tank filler
neck. Access to filter is gained through right
hand rear wheel arch.
3.Thoroughly clean area around hose connections
to prevent ingress of foreign matter into fuel
system.
4.Loosen two fuel unions and remove hoses from
filter canister.
5.Release securing bolt and bracket, remove filter
from chassis side member.
6.Fit a new filter observing direction of flow arrow
on canister.
7.Fit inlet and outlet hoses. Tighten to
30 Nm.
8.Refit fuel pump relay.
9.Reconnect battery negative lead.
10.Recode radio.
11.Start engine and inspect hose connections for
fuel leaks.

SUPPLEMENTARY RESTRAINT SYSTEM
1
FAULT DIAGNOSIS CRASH SENSOR INSPECTION - DISTRIBUTED
SRS
1.After any degree of front body damage, inspect
both front crash sensors. Replace a sensor if
there are any signs of dents, cracks or
deformation.
2.Ensure the sensors are installed correctly. There
must be no gap between the sensor and body of
the vehicle. Use the fixing screws supplied with
the sensor and tighten to the correct torque.
Tighten front sensor fixing before rear sensor
fixing.
CAUTION: Take extra care when painting
or doing body work in the vicinity of the
sensors. Avoid direct exposure of the
sensors or harness to heat guns, welding or
spraying equipment.AIRBAG HARNESS
1.Never attempt to modify, splice or repair the
airbag harness. Never install electronic
equipment such as; a mobile telephone, two-way
radio or in-car entertainment system in such a
way that it interferes electrically with the airbag
harness.
NOTE: The airbag harness can be
identified by a special yellow outer
protective covering.
2.Make sure the airbag harness is installed
correctly and not pinched or trapped.
3.Ensure all airbag harness connectors are mated
correctly and securely fastened. Do not leave the
connectors hanging loose.

CHASSIS AND BODY
33
REPAIR WINGS [FENDERS]
Service repair no - 76.10.24
Remove
1.Disconnect battery negative lead.
2.Remove the headlamp surround.
3.Remove the front bumper assembly.
4.Remove the indicator repeater light.
5.Remove the four screws securing the wing
[fender] at the 'A' post.
6.Remove the bolts securing the bottom of the
wing [fender] at the bumper retaining bracket
and at the sill finisher.
7.If removing the RH wing [fender] loosen the
radio aerial securing nut.
8.Remove the seven bolts from the drain channel
in the top of the wing [fender].
9.Break the sealed joints at the valance and 'A'
post; then complete the removal of the wing
[fender]. If removing a RH wing withdraw the
wing [fender] sufficiently to allow removal of the
aerial before completing the removal.Cleaning/painting
10.Thoroughly clean all traces of existing sealant
from the sealing faces of the valance and 'A'
post.
11.Paint the cleaned surfaces with etch primer.
12.If the existing wing [fender] is to be refitted
repeat the cleaning and painting procedure on
the wing [fender] sealing surfaces.
Refit
13.Apply 3M 8572 Bolted Panel Sealer to the joint
faces on the valance and 'A' post and to the
bracket face.
14.Refit the wing [fender], on RH wings [fenders] fit
the radio aerial, and secure with the bolts and
screws ensuring that the wing [fender] correctly
aligns with the bonnet [hood].

76CHASSIS AND BODY
46
REPAIR DASH PANEL CENTRAL LOUVRE PANEL
Service repair no - 76.46.42
Remove
1.Disconnect battery negative lead.
2.Remove radio.
See ELECTRICAL, Repair,
radio.
3.Release tags securing radio cage to louvre
panel and remove cage.
4.Remove clock.
See ELECTRICAL, Repair,
clock.
5.Release 4 coin tray securing tags.
6.Remove coin tray.
7.Remove 3 heater control and blower switch
knob.
8.Remove 2 screws securing heater graphic
display panel and remove panel.
9.Remove 4 screws securing heater control unit to
panel.
10.Working through coin tray aperture, remove
screw securing panel.
11.Working through clock aperture, remove screw
securing panel.
12.Loosen 2 uppermost panel retaining screws.
NOTE: On some models the panel is fitted
with an LED. In this case, manoeuvre LED
from panel and disconnect.
13.Remove panel retaining screw cover.

CHASSIS AND BODY
47
REPAIR
14.Remove 2 screws securing louvre panel.
15.Remove louvre panel from dash panel.
Refit
16.Position louvre panel, feed harness connectors
through their correct apertures,and align to dash
panel.
CAUTION: When refitting avoid trapping of
electrical wiring.
17.Fit and tighten screws securing louvre panel.
18.Fit panel retaining screw cover.
19.Position heater control unit to panel and secure
with screws.
20.Fit heater graphic display panel and secure with
screws.
21.Fit heater control and blower switch knobs.
22.Fit clock.
See ELECTRICAL, Repair, clock.
23.Position coin tray and secure to tags.
24.Position radio cage, feed electrical connectors
and aerial through cage, and position to panel.
25.Bend back radio cage retaining tags.
26.Fit radio.
See ELECTRICAL, Repair, radio.
27.Connect battery negative lead.DASH PANEL ASSEMBLY
Service repair no - 76.46.23
Remove
1.Move front seats to rearmost position.
2.Disconnect battery negative lead.
3.Disconnect air bag multiplugs under dash panel.
CAUTION: When air bags are fitted,
reference must be made to the Airbag
Supplementary Restraint System section.
4.Remove passenger glove box.
5.Remove driver's side access panel.
6.Remove centre console assembly.
See centre
console.
7.Remove airbag from steering wheel.See
SUPPLEMENTARY RESTRAINT SYSTEM,
Repair, driver's airbag module.
8.Remove passenger's airbag from dash panel.
See SUPPLEMENTARY RESTRAINT SYSTEM,
Repair, passenger's airbag module.
9.Release clamp and lower steering column.
10.Remove steering wheel.
See STEERING,
Repair, steering wheel.
11.Remove column switch.See
SUPPLEMENTARY RESTRAINT SYSTEM,
Repair, column switch assembly.
12.Remove instrument binnacle.See
ELECTRICAL, Repair, instrument binnacle.
13.Remove radio.See ELECTRICAL, Repair,
radio.
14.Remove exterior mirrors switch panel.
15.Remove coin tray.
16.Remove switch panel.
17.Remove clock.
18.Undo screw securing mounting bracket and
position passenger's side relay assembly aside.
19.Set heater controls fully clockwise.

ELECTRICAL
1
DESCRIPTION AND OPERATION ELECTRICAL EQUIPMENT
DESCRIPTION
The electrical system is Negative ground, and it is
most important to ensure correct polarity of the
electrical connections at all times. Any incorrect
connections made when reconnecting cables may
cause irreparable damage to the semi-conductor
devices used in the generator and regulator. Incorrect
polarity would also seriously damage any
transistorized equipment such as radio and
tachometer etc.
WARNING: During battery removal or
before carrying out any repairs or
maintenance to electrical components
always disconnect the battery negative lead first.
If the positive lead is disconnected with the
negative lead in place, accidental contact of the
wrench to any grounded metal part could cause a
severe spark, possibly resulting in personal
injury. Upon installation of the battery the positive
lead should be connected first.
GENERATOR
The generator is a three phase, field sensed unit. The
rotor and stator windings produce three phase
alternating current, AC, which is rectified to direct
current, DC. The electronic voltage regulator unit
controls the generator output voltage by high
frequency switching of the rotor field circuit. Use only
the correct Vehicle replacement fan belt. Occasionally
check that the engine and generator pulleys are
accurately aligned.
It is essential that good electrical connections are
maintained at all times. Of particular importance are
those in the charging circuit (including those at the
battery) which should be occasionally inspected to
see that they are clean and tight. In this way any
significant increase in circuit resistance can be
prevented.Do not disconnect battery cables while the engine is
running or damage to the semi-conductor devices
may occur. It is also inadvisable to break or make any
connections in the generator charging and control
circuits while the engine is running.
The electronic voltage regulator employs micro-circuit
techniques resulting in improved performance under
difficult service conditions. The whole assembly is
encapsulated in silicone rubber and housed in an
aluminium heat sink, ensuring complete protection
against the adverse effects of temperature, dust, and
moisture etc.
The regulating voltage is set during manufacture to
give the required regulating voltage range of 14.2±
0.2 volts, and no adjustment is necessary. The only
maintenance needed is the occasional check on
terminal connections and wiping with a clean dry
cloth.
The generator system provides for direct connection
of a charge (ignition) indicator warning light, and
eliminates the need for a field switching relay or
warning light control unit. As the warning lamp is
connected in the charging circuit, lamp failure will
cause loss of charge. Lamp should be checked
regularly and spare carried.
When using rapid charge equipment to re-charge the
battery, the battery must be disconnected from the
vehicle.
NOTE: For description and operation of
electrical circuits see separate publication:
Electrical Troubleshooting Manual.

ELECTRICAL
3
DESCRIPTION AND OPERATION Radio frequency system
The RF system uses four frequencies according to
market. If the coaxial aerial is not fitted system
performance will be impaired. Both ECU and handset
have a colour coded label.
Frequency Colour Territory
ECU/Handset
433.92 MHz Blue/black........................... UK, Ireland........................
224.5 MHz, Yellow/yellow............................ France...................
433.92 MHz Blue/Purple........................... Germany......................
433.92 MHz Blue/blue........................... Europe, not France, Switzerland, Italy, Denmark,..........................
Germany
433.92 MHz White/Blue........................... Switzerland, Denmark.......................
315.0 MHz Green/green............................. Rest of world, Italy, Australia....................
315.0 MHz Orange/Green............................. Gulf, Japan..................
Partially armed mode
If a door, tailgate or bonnet [hood] is left open when
the system is armed, the LED will not light for 10
seconds indicating a mislock condition. Hazard lights
will not flash. If an open door or tailgate is causing the
mislock, the starter motor is disabled. The alarm will
sound if ignition is turned to start position. If an open
bonnet [hood] is causing the mislock the starter motor
is disabled. The alarm will arm the volumetric part of
the system. If the door tailgate or bonnet [hood] is
subsequently closed, after a 5 second delay, the
doors will unlock and immediately lock and the system
will fully arm.
Handset transmitter
The handset LED will give one short flash when
button is pressed momentarily.
If button is held down the LED will light again after 2
seconds for 2 seconds, and extinguish until button is
released and repressed. The handset contains unique
information distinguishing it from other transmitters. It
also contains a set of 'random' rolling codes
programmed into the ECU before leaving the factory.
Each time the handset is pressed a different code is
transmitted to the ECU.
If handset is operated more than four times outside
the vehicle range (6 metres) or power supply is
removed, it will be necessary to re-sychronise handset
and the ECU by pressing the handset three times
within range and within 5 seconds.
NOTE: If both handsets are lost or
damaged when system is armed it will be
necessary to fit a new ECU with two
matching handsets.
Handset batteries
If handset LED flashes continuously when button is
pressed, the batteries need replacing. The hazard
lights will flash one 3 second pulse, instead of three
times upon arming vehicle.
Power up mode
The alarm system always remembers the state it was
left in when power was removed. If the alarm powers
up in an armed state and is subsequently triggered it
will give a warning that it will fully trigger unless
disarmed. This warning consists of short horn pulses
every two seconds for 15 seconds.
New born mode
When the ECU is first produced, it will be in its 'new
born' mode. In this mode it will respond to any remote
of the right frequency. This mode will be cancelled
when the ECU has received ten valid handset signals
without power interruption.
Engine cranking
It is only possible to crank the engine when ignition is
ON and alarm disabled.

86ELECTRICAL
10
DESCRIPTION AND OPERATION Radio frequency system
The RF system uses frequencies according to market
and both ECU and handset are colour coded:
Territory ECU/Handset............................... Frequency..................
Europe Blue/Blue.................................. 433.92 MHz.........................
NAS Green/Green....................................... 315.00 MHz....................
Japan Green/Green.................................... 315.00 MHz....................
Gulf Green/Green....................................... 315.00 MHz....................
Rest of World Green/Brown........................ 315.00 MHz...................
NOTE: In service NAS, Japan and Gulf will
have the handset changed to brown.
Passive coil
The passive coil excites a receiving coil in the handset
causing it to automatically transmit a remobilisation
signal to the ECU.
Inertia switch and central door locking
Actuation of the inertia switch will cause the doors to
be unlocked. A time-out period (programmable
between 0-5 minutes) will ensue, during which all CDL
and alarm activity is disabled.
NOTE: This feature only applies when the
starter switch is in the on position.
Handset
Under normal circumstances pressing the respective
buttons on the handset once, will unlock or lock the
vehicle. If operating the handset does not achieve the
desired effect
See Repair, Handset.
Functional detail
For full functional details and circuit diagrams
See
Electrical Trouble Shooting Manual..
Vehicle traceability
All Land Rover vehicles are fitted with a multitude of
discreet security features to prevent theft or assist
recovery in the event of a vehicle being stolen. All
vehicles are traceable, since it is impossible to
remove all security identification.