window LAND ROVER DISCOVERY 1995 User Guide

82AIR CONDITIONING
4
ADJUSTMENT Evacuation and recharging
1.Add refrigerant oil to compressor if necessary.
2.Renew the receiver/drier.
CAUTION: When a major repair has been
carried out, a leak test should be carried
out using inert gas.
3.Connect a Refrigerant Station to the high and
low pressure servicing connections.
CAUTION: Whenever the refrigerant
system is opened, the receiver/drier must
be renewed immediately before evacuating
and recharging the system.
4.Operate the refrigerant evacuation system
according to the manufacturer's instructions.
NOTE: If the vacuum reading is below
700mmHg after 15 minutes, suspect a leak
in the system. Partially recharge the
system and check for leaks using an electronic
leak tester. Check suction lines first, then run the
compressor for 5 minutes and then check the high
pressure lines.
CAUTION: The system must be evacuated
immediately before recharging
commences. Delay between evacuation
and recharging is not permitted.
5.Operate the refrigerant recharging system
according to the manufacturer's instructions:-
Refrigerant required to charge system:
Without rear air conditioning = 0.90kg (32 fl/oz)
With rear air conditioning = 1.15kg (40 fl/oz)
6.If the full charge has not been accepted by the
system, start the engine and run it at 1500
rev/min for a minimum of 2 minutes.
Switch on the air conditioning system, open the
car windows, set the temperature control to cold
and switch the blower to maximum speed.
7.Consult Refrigerant Station Manual for correct
procedure to complete the charge.
8.Carry out the air conditioning system
performance test.LEAK TEST SYSTEM
The following instructions refer to an electronic type
Refrigerant Leak Detector for use with R134a, which
are the safest and most sensitive.
CAUTION: When a major repair has been
carried out, a leak test should be carried
out using an inert gas (see below).
1.Place the vehicle in a well ventilated area but
free from draughts, as leakage from the system
could be dissipated without detection.
2.Follow the instructions issued by the
manufacturer of the particular leak detector
being used.
3.Commence searching for leaks by passing the
detector probe around all joints and components,
refrigerant gas is heavier than air.
4.Insert the probe into an air outlet of the
evaporator or into the evaporator drain tube.
Switch the air conditioning blower on and off at
intervals of ten seconds. Any leaking refrigerant
will be gathered in by the blower and detected.
5.Insert the probe between the magnetic clutch
and compressor to check the shaft seal for
leaks.
6.Check all service valve connections, valve plate,
head and base plate joints and back seal plate.
7.Check the condenser for leaks at the pipe
unions.
8.If any leaks are found, the system must be
discharged before rectification.
9.Rectify any leaks and recheck for leaks during
evacuation prior to charging.
Leak test using inert gas
Use Nitrogen or Helium gas.
1.Connect gas line to recharging station.
2.Pressurise system to 3 bar.
3.Carry out leak test as above.

AIR CONDITIONING
5
ADJUSTMENT AIR CONDITIONING SYSTEM - PERFORMANCE
TEST
WARNING: R134a is hazardous, refer to
the GENERAL PRECAUTIONS given at the
beginning of this section.
Carry out this test with bonnet and doors or windows
open, air conditioning switched on, temperature
control set to cold and blower at maximum speed. Set
the air supply control to supply fresh air.
1.Close low pressure valve on refrigerant station.
2.Close high pressure valve on refrigerant station.
3.Connect a Refrigerant Station to the high and
low pressure servicing connections.4.Insert dry bulb thermometer into cold air outlet
and position dry and wet bulb thermometer close
to outside air inlet.
Do not spill water from the wet thermometer
(psychrometer).
5.Start engine and run it at 1500 rev/min for 10
minutes with air conditioning switched on.
6.Check that sight glass is free of bubbles.
7.Read both pressure gauges and thermometers.
Check readings against table below with
humidity between 60% and 80%. If readings are
incorrect.
See Fault diagnosis, Refrigeration
System Faults.
8.Switch off air conditioning, stop engine,
disconnect test equipment.
Performance range
Intake temperature Outlet temperature Low pressure High pressure
20 - 24°C4-10°C 18 - 28 lbf/in
2213 - 299 lbf/in2
1.2 - 1.9 bar 14.7 - 20.6 bar
25 - 29°C9-19°C 27 - 37 lbf/in2256 - 341 lbf/in2
1.9 - 2.6 bar 17.6 - 23.5 bar
30 - 35°C20-27°C 33 - 47 lbf/in2299 - 384 lbf/in2
2.3 - 3.2 bar 20.6 - 26.5 bar
Table 1
Ambient Compound Gauge High Pressure
Temperature Readings Gauge Readings
ÊC°F bar lbf/in
2bar lbf/in2
16 60 1,03-1,4 15-20 6,9-10,3 100-150
26,7 80 1,4-1,72 20-25 9,6-13,1 140-190
38 100 1,72-2,1 25-30 12,4-15,5 180-225
43,5 110 2,1-2,4 30-35 14,8-17,2 215-250

82AIR CONDITIONING
6
ADJUSTMENT SYSTEM TEST
1.Place the vehicle in a ventilated, shaded area
free from excessive draught, with the doors and
windows open.
2.Check that the surface of the condenser is not
restricted with dirt, leaves, flies, etc. Do not
neglect to check the surface between the
condenser and the radiator. Clean as necessary.
3.Switch on the ignition and the air conditioner air
flow control. Check that the blower is operating
efficiently at low, medium and high speeds.
Switch off the blower and the ignition.
4.Check that the evaporator condensate drain
tubes are open and clear.
5.Check the tension of the compressor driving belt,
and adjust if necessary.
6.Inspect all connections for the presence of
refrigerant oil. If oil is evident, check for leaks,
and repair as necessary.
NOTE: The compressor oil is soluble in
Refrigerant R134a and is deposited when
the refrigerant evaporates from a leak.
7.Start the engine.
8.Set the temperature controls to cold and switch
the air conditioner blower control on and off
several times, checking that the magnetic clutch
on the compressor engages and releases each
time.9.With the temperature control at maximum
cooling and the blower control at high speed,
warm up the engine and fast idle at 1000
rev/min. Check the sight glass for bubbles or
foam. The sight glass should be generally clear
after five minutes running, occasional bubbles
being acceptable. Continuous bubbles may
appear in a serviceable system on a cool day, or
if there is insufficient air flow over the condenser
at a high ambient temperature.
10.Repeat at 1800 rev/min.
11.Gradually increase the engine speed to the high
range, and check the sight glass at intervals.
12.Check for frosting on the service valves.
13.Check the high pressure hoses and connections
by hand for varying temperature. Low
temperature indicates a restriction or blockage at
that point.
14.Switch off the air conditioning blower and stop
the engine.
15.If the air conditioning equipment is still not
satisfactory, carry out a pressure test as
previously described in this section.
COMPRESSOR DRIVE BELT
Service repair no - 82.10.01.
Tdi -
See ENGINE, Repair, Compressor drive belt
V8i and MpiSee ENGINE, Repair, Drive belt

WIPERS AND WASHERS
1
DESCRIPTION AND OPERATION WINDSCREEN WIPER AND WASHER OPERATION
The illustration below locates and identifies the main
components of the windscreen and washer system
which is operated by a multi-switch on the right hand
side of the steering column.
All functions of the system are described in the
following paragraphs.
1. Multi-switch
2. Wiper motor
3. Wiper arm/blade
4. Washer reservoir
5. Windscreen washer motor/pump
6. Non return valve
7. Washer jet
8. Rear window washer motor pump
9. Non return valve10. Headlamp power wash motor/pump
11. Headlamp power washer jet
12. Non return valve
13. Rear window wiper switch
14. Rear window washer switch
15. Rear window wiper motor, arm and blade
16. Washer jet

84WIPERS AND WASHERS
2
DESCRIPTION AND OPERATION Wash wipe function
With the ignition switched on, power is supplied via a
fuse to the multi-switch, a control unit and a park
switch which is driven by the wiper motor.
Single wipe A
Pull the lever down and release immediately.
NOTE: With the lever held down, the
wipers will continue operating at high
speed until it is released.
Intermittent wipe B
Turn switch to second position.
Normal speed wipe C
Turn switch to second position.
Fast speed wide D
Turn switch to third position.
Variable delay (intermittent wipe)
Rotate the switch to vary the delay between wipes.
Windscreen washer E
Pull the lever towards the steering wheel. The
windscreen washers will operate in conjunction with
the wipers for as long as the lever is held in this
position.
Headlamp washers
The headlamp washers operate automatically
whenever the windscreen washers are operated,
provided the headlamps are illuminated and switched
to dipped beam. For continuous washing, hold the
windscreen washer control in the washposition E.
REAR WINDOW WIPER AND WASHER
OPERATION
The illustration J5375 also locates and identifies the
main components of the rear window wiper and
washer system which is operated by two switches
mounted on the right hand side of the instrument
binnacle.
Rear window wipe A
Press the switch to operate: after continuously wiping
3 or 4 times, the wiper operates intermittently (approx
once every 6 seconds) until switched off.
Rear window washer B
Press and hold the switch for the required duration of
rear screen washing. The wiper operates
automatically during washing and continues for a
further 3 wipes after the switch is released.

WIPERS AND WASHERS
1
FAULT DIAGNOSIS WIPER MOTOR CHECKING
NOTE: These instructions apply to
windscreen and rear window wiper motor.
If unsatisfactory operation of wiping equipment is
experienced, a systematic check to determine fault
should be carried out:
1.Check blades for signs of excessive friction. This
reduces wiping speed of motor and cause
increased current draw which may damage
armature. Check by substitution.
2.Check windscreen wiper motor light running
current and speed with motor coupling link
disconnected from wiper shaft transmission
linkage.
Check rear window glass wiper motor with wiper
connected and glass wet. Connect an ammeter in
series with motor supply. Measure current
consumption when motor is switched on. Check
operating speed by timing speed of rotation of motor
coupling link. The results should compare with figures
given in 'General Specification Data'.
NOTE: If vehicle wiring connections are
disconnected and an alternative supply
source is applied it is essential that
correct polarity is observed. Failure to observe
this will cause motor to rotate in reverse direction,
which may result in limit switch contacts being
damaged.
3.If motor does not run satisfactorily or takes
higher than normal current, a fault exists and
must be remedied.
4.If current consumption and speed of motor are
satisfactory. A check should be carried out for
proper functioning of transmission linkage and
wiper arm shafts.
NOTE: Service parts are not available for
windscreen and rear window wiper motors
with exception of windscreen wiper rotary
connecting link.

WIPERS AND WASHERS
1
REPAIR WASHER RESERVOIR
Service repair no - 84.10.03.
Remove
1.Remove two bolts securing top of reservoir.
2.From underneath the wheelarch remove two
bolts securing base of reservoir.
3.Withdraw reservoir and disconnect tubing from
washer pumps and power wash.
4.Disconnect electrical leads from pumps.
Refit
5.Reverse removal procedure. 1 to 4.WASHER PUMP - WINDSCREEN, REAR WINDOW
OR POWER WASH
Service repair no - 84.20.21.
Remove
1.Remove washer reservoir.See Washer
reservoir
2.Disconnect washer tubing from pump.
3.Disconnect electrical leads from pump.
4.Pull top of pump away from its location in
reservoir and remove pump.
Note position of sealing gasket in reservoir.
Refit
5.Reverse removal procedure. 1 to 4.

WIPERS AND WASHERS
3
REPAIR WIPER ARMS - WINDSCREEN
Service repair no - 85.15.01.
Remove
1.Lift wiper arm end cap to gain access to securing
nut.
2.Remove nut and withdraw wiper arm from
splined boss.
Refit
3.Allow wiper motor to move to 'park' position.
4.Push arm onto splined boss, locating it so that
wiper blades are clear of windscreen rail.
5.Fit and tighten securing nut.
6.Push end cap over securing nut.
7.Operate wiper on a wet windscreen to ensure
blades do not over travel.WIPER ARM - REAR WINDOW
Service repair no - 84.35.01.
Remove
1.Remove plastic nut cover and wiper arm
securing nut.
2.Withdraw wiper arm and grommet from splined
boss.
Refit
3.Allow wiper motor to move to 'park' position.
4.Fit spacer and wiper arm to splined boss so that
the wiper blade is clear of rear window surround.
5.Fit and tighten securing nut.
6.Push plastic nut cover into position.
7.Check operation of wiper.

84WIPERS AND WASHERS
4
REPAIR WIPER BLADES
Service repair no - 84.15.05
Remove
1.Pull wiper blade away from screen.
2.Depress spring clip and withdraw blade from
hooked end of wiper arm.
Refit
3.Reverse removal procedure. 1 and 2.REAR WINDOW WASHER JET
Service repair no - 84.30.09
Remove
1.Turn washer jet in a clockwise direction to
release it from the rear quarter panel.
2.Remove rear quarter/speaker trim panel.
3.Feed washer tubing through rear quarter panel
to allow removal of washer jet.
4.Remove washer jet from tubing.
Refit
5.Reverse removal procedure. 1 to 4.
NOTE: The tubing run from the reservoir to
rear door washer jet differs between left
and right hand drive vehicles. On right
hand vehicles the tubing run is on the left hand
side of the roof. On left hand drive vehicles, the
right side.
See Description and operation,
Windscreen Wiper and Washer Operation

ELECTRICAL
1
REPAIR FUSE BOX - INTERIOR
Right Hand Drive shown
The interior fusebox is fitted below the steering column, behind the trim panel. It comprises of three integral units.
'A'Main fusebox,'B'Satellite 2,'C'Satellite 1.
A label in the fusebox cover shows the circuits protected, the fuse rating and their locations. Access is by
releasing the fixing screws and lowering the panel.
'A' Main fusebox
1. Stop lights, direction indicators
2. LH side light
3. Radio/cassette/CD player
4. RH headlight main beam
5. LH headlight main beam
6. Cigar lighter
7. Airbag SRS
8. RH side lights
9. Rear fog guard lights
10. RH headlight dipped beam
11. LH headlight dipped beam
12. Multi-function unit
13. Ignition feed for Multi-function unit
14. Instruments, reversing lights
15. Air conditioning, windows
16. Washers & wipers - front
17. Starter, glow plug
18. Wash/wipe - rear, mirrors, cruise control
'B' Satellite 2
1. Electric windows - front
2. Electric windows - rear
3. Anti-lock braking
4. Central door locking
5. Electric sun roof
6. Trailer lights
'C' Satellite 1
1. Anti-theft alarm
2. Headlight washers
3. Engine management
4. Anti-lock brakes
5. Anti-theft alarm
6. Rear air conditioning, heater
'D' Spare fuses (5 off)