1996 LAND ROVER DEFENDER air conditioning

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88Workshop manual
DEFENDER 300Tdi
This manual covers vehicles from
1996 model year
01 INTRODUCTION
04 GENERAL SPECIFICATION DATA
05 ENGINE TUNING DATA
07 GENERAL FITTING REMINDERS
09 LUBRICANTS, FLUIDS AND CAPACITIES
10 MAINTENANCE
12 ENGINE Tdi
19 FUEL SYSTEM Tdi
26 COOLING SYSTEM Tdi
30 MANIFOLD AND EXHAUST SYSTEM
33 CLUTCH
37 MANUAL GEARBOX
41 TRANSFER GEARBOX
47 PROPELLER SHAFTS
51 REAR AXLE AND FINAL DRIVE
54 FRONT AXLE AND FINAL DRIVE
57 STEERING
60 FRONT SUSPENSION
64 REAR SUSPENSION
70 BRAKES
74 WHEELS AND TYRES
76 CHASSIS AND BODY
80 HEATING AND VENTILATION
82 AIR CONDITIONING
84 WIPERS AND WASHERS
86 ELECTRICAL
88 INSTRUMENTS
Publication Part No. LRL 0097 ENG (3rd Edition)
Published by Rover Technical Communication
Ó1999 Rover Group Limited

INTRODUCTION
1
INFORMATION REV: 05/99 INTRODUCTION
This workshop manual covers vehicles from 1996
model year onwards. Amendments and additional
pages will be issued to ensure that the manual covers
latest models. Amendments and additions will be
identified by the addition of a dated footer at the
bottom of the page.
This Workshop Manual is designed to assist skilled
technicians in the efficient repair and maintenance of
Land Rover Defender 300Tdi, Td5, and V8i vehicles.
Individuals who undertake their own repairs should
have some skill and training, and limit repairs to
components which could not affect the safety of the
vehicle or its passengers. Any repairs required to
safety critical items such as steering, brakes,
suspension or supplementary restraint system should
be carried out by a Land Rover Dealer. Repairs to
such items should NEVER be attempted by untrained
individuals.
WARNINGS, CAUTIONSandNOTESare given
throughout this Manual in the following form:
WARNING: Procedures which must be
followed precisely to avoid the possibility
of personal injury.
CAUTION: This calls attention to
procedures which must be followed to
avoid damage to components.
NOTE: This calls attention to methods
which make a job easier or gives helpful
information.
DIMENSIONS
The dimensions quoted are to design engineering
specification. Alternative unit equivalents, shown in
brackets following the dimensions, have been
converted from the original specification.REFERENCES
References to the left or right hand side in the manual
are made when viewing the vehicle from the rear.
With the engine and gearbox assembly removed, the
crankshaft end of the engine is referred to as the front.
To reduce repetition, some operations covered in this
Manual do not include reference to testing the vehicle
after repair.
It is essential that work is inspected and tested after
completion and if necessary a road test of the vehicle
is carried out, particularly where safety related items
are concerned.
REPAIRS AND REPLACEMENTS
When replacement parts are required it is essential
that Land Rover parts are used.
Attention is particularly drawn to the following points
concerning repairs and the fitting of replacement parts
and accessories: Safety features embodied in the
vehicle may be impaired if other than Land Rover
parts are fitted. In certain territories, legislation
prohibits the fitting of parts not to the vehicle
manufacturer's specification. Torque spanner values
given in the Workshop Manual must be strictly
adhered to. Locking devices, where specified, must be
fitted. If the efficiency of a locking device is impaired
during removal it must be replaced with a new one.
Certain fasteners must not be re-used. These
fasteners are specified in the Workshop Manual.
POISONOUS SUBSTANCES
Many liquids and other substances used are
poisonous and therefore must not be consumed. It is
also advisable to keep all substances away from open
wounds. These substances among others include
anti-freeze, brake fluid, fuel, windscreen washer
additives, air conditioning refrigerant, lubricants and
various adhesives.

01INTRODUCTION
10
INFORMATION CROSS REFERENCE OF EMISSION SYSTEM
TERMINOLOGY
NEW TERM (ACRONYM)
Accelerator pedal (AP).................................................
Air cleaner (ACL)..........................................................
Air conditioning (AC)....................................................
Battery positive voltage (B+)........................................
Closed loop (CL)..........................................................
Closed throttle position (CTP)......................................
Canister purge valve (CANPV)....................................
Data link connector (DLC)...........................................
Diagnostic trouble code (DTC).....................................
Distributor ignition (DI).................................................
Engine control module (ECM)......................................
Engine coolant level (ECL)...........................................
Engine coolant temperature (ECT)..............................
Engine coolant temperature sensor (ECTS)................
Engine speed (RPM)....................................................
Evaporative emission system (EVAP)..........................
Engine fuel temperature sensor (EFTS)......................
4th gear, 3rd gear etc. (4GR, 3GR)..............................
Fuel pump (FP)............................................................
Fan control module (FCM)...........................................
Generator (GEN)..........................................................
Ground (GND)..............................................................
Heated oxygen sensor (H02S)....................................
Idle air control (IAC)......................................................
Idle air control valve (IACV).........................................
Ignition control module (ICM).......................................
Intake air temperature (IAT).........................................
Manifold vacuum zone (MVZ)......................................
Mass air flow sensor (MAFS).......................................
Open loop (OL)............................................................
Relay module (RM)......................................................
Solid state relay module (SSRM).................................
Three way catalytic converter (TWC)..........................
Throttle body (TB)........................................................
Throttle position sensor (TPS)......................................
Transmission range (TR)..............................................
Wide open throttle (WOT)............................................OLD TERM (ACRONYM)
Throttle pedal (-)..........................................................
Air cleaner (-)...............................................................
Air conditioning (AC)....................................................
Battery plus, bat +, bat feed (B+).................................
Closed loop (-).............................................................
Closed throttle, idle position (-)....................................
Charcoal canister purge valve (-).................................
Serial link (-)................................................................
Fault code (-)...............................................................
Electronic ignition (-)....................................................
Electronic control unit (ECU)........................................
Coolant level (-)...........................................................
Coolant temperature (temp).........................................
Coolant temperature thermistor (-)..............................
Engine speed (rev/min)................................................
Evaporative loss system (ELC)...................................
Fuel temperature thermistor (-)....................................
Fourth gear, 3rd gear (-)..............................................
Fuel pump (-)...............................................................
Condenser fan timer (-)................................................
Alternator (-)................................................................
Ground, earth (B-)........................................................
Lambda (02) sensor (-)................................................
Idle speed control (ISC)................................................
Stepper motor (-).........................................................
Ignition module (-)........................................................
Intake temperature/ambient temperature (-)................
Manifold depression, vacuum (-).................................
Air flow meter (-)..........................................................
Fault code display unit (-)............................................
Open loop (-)...............................................................
Relay (-).......................................................................
Control unit (-)..............................................................
Catalyst, catalytic converter (CAT)..............................
Throttle housing (-)......................................................
Transmission gear (-)...................................................
Full throttle, wide open throttle (WOT).........................

GENERAL SPECIFICATION DATA
7
INFORMATION AIR CONDITIONING
System CFC free expansion valve system.............................................................................
Compressor Sanden TRS105N.....................................................................
Refrigerant R134a CFC free.......................................................................
Charge quantity 1.1 Kg................................................................
WIPER MOTORS
Tailgate wiper motor
Make/type IMOS (non-serviceable)........................................................................
Running current, wet screen at 20°C ambient 1.0 to 2.8 amps.................
Wiper speed, wet screen at 20°C ambient 37 to 43 cycles per minute.......................
Windscreen wiper motor
Make/type Lucas 14W uprated two speed........................................................................
Armature end float 0,1 to 0,2 mm............................................................
Brush length, minimum 4,8 mm....................................................
Brush spring tension 140 to 200 g........................................................
Resistance of armature winding
at 16ÊC (69ÊF) measured between adjacent
commutatator segments 0.23 to 0.35 ohms...................................................
Light running, rack disconnected: current at 13.5 V 2.0 amps.........
Wiper speed, wet screen, 60 seconds from cold Low speed - 45±3 rev/min, High speed - 65±5 ..............
rev/min
ELECTRICAL
System 12 volt, negative ground.............................................................................
Battery
Make/type - standard Land Rover Parts and Equipment/Lucas maintenance.......................................................
free 9-plate 072
Make/type - heavy duty Land Rover Parts and Equipment/Lucas maintenance....................................................
free 14-plate 663
Generator
Manufacturer Magnetti Marelli....................................................................
Type A127 - 100amp.................................................................................
Polarity Negative ground.............................................................................
Brush length:
New 17 mm.........................................................................
Worn, minimum free protrusion from moulding 5 mm........
Brush spring pressure flush with moulding 1.3N to 2.7N......................
Regulator voltage 13.6 to 14.4 volts.............................................................
Nominal output
Generator speed 6000 rev/min.....................................................
Control voltage 14 volt........................................................
Amp 65 amp.........................................................................

GENERAL FITTING REMINDERS
1
INFORMATION GENERAL FITTING REMINDERS
WORKSHOP SAFETY IS YOUR RESPONSIBILITY!
The suggestions, cautions and warnings in the
section are intended to serve as reminders for
trained and experienced mechanics. This manual
is not a definitive guide to automotive mechanics
or workshop safety.
Shop equipment, shop environment, and the use
and disposal of solvents, fluids, and chemicals
are subject to government regulations which are
intended to provide a level of safety. It is your
responsibility to know and comply with such
regulations.
PRECAUTIONS AGAINST DAMAGE
1.Always fit covers to protect fenders before
commencing work in engine compartment.
2.Cover seats and carpets, wear clean overalls
and wash hands or wear gloves before working
inside vehicle.
3.Avoid spilling hydraulic fluid or battery acid on
paint work. Wash off with water immediately if
this occurs. Use Polythene sheets to protect
carpets and seats.
4.Always use a recommended Service Tool where
specified.
5.Protect temporarily exposed screw threads by
replacing nuts or fitting plastic caps.SAFETY PRECAUTIONS
1.Whenever possible, use a lift when working
beneath vehicle, in preference to jacking. Chock
wheels as well as applying parking brake.
WARNING: Do not use a pit when
removing fuel system components.
2.Never rely on a jack alone to support vehicle.
Use axle stands carefully placed at jacking
points to provide rigid support.
3.Ensure that a suitable form of fire extinguisher is
conveniently located.
4.Check that any lifting equipment used has
adequate capacity and is fully serviceable.
5.Disconnect battery.
WARNING: Do not disconnect any pipes in
air conditioning system, unless trained
and instructed to do so. A refrigerant is
used which can cause blindness if allowed to
contact eyes.
6.Ensure that adequate ventilation is provided
when volatile degreasing agents are being used.
7.Do not apply heat in an attempt to free stiff
fixings; as well as causing damage to protective
coatings, there is a risk of damage to electronic
equipment and brake linings from stray heat.

09LUBRICANTS, FLUIDS AND CAPACITIES
2
INFORMATIONREV: 05/99 Propeller shaft Front
and RearNLGI - 2 Multi-purpose Lithium based GREASE
Lubrication nipples
(hubs, ball joints
etc.)
Seat slides
Door lock striker
Brake and clutch
reservoirsBrake fluids having a minimum boiling point of 260°C (500°F) and complying with
FMVSS 116 DOT4
Engine coolant
(Pre-99MY)Use an ethylene glycol based anti-freeze (containing no methanol) with non-phosphate
corrosion inhibitors suitable for use in aluminium engines to ensure the protection of the
cooling system against frost and corrosion in all seasons. Use one part anti-freeze to
one part water for protection down to -36°C (-33°F).
IMPORTANT: Coolant solution must not fall below proportions one part
anti-freeze to three parts water, i.e. minimum 25% anti-freeze in coolant otherwise
damage to engine is liable to occur. Maximum concentration is 60%.
Engine coolant
(99MY on)Use Texaco XLC long life coolant. Use one part anti-freeze to one part water for
protection down to -36°C (-33°F).
IMPORTANT: Coolant solution must not fall below 50% anti-freeze otherwise
damage to the engine is liable to occur. Maximum concentration is 60%.
Battery lugs, Petroleum jelly.
earthing surfaces
where paint has
been removed.NOTE: Do not use Silicone Grease
Air Conditioning
System Refrigerant Use only refrigerant R134a
Compressor Oil Sanden oil
LUBRICATION PRACTICE
Use a high quality oil of the correct viscosity range and service classification in the engine during maintenance and
when topping up. The use of oil not to the correct specification can lead to high oil and fuel consumption and
ultimately to damaged components.
Oil to the correct specification contains additives which disperse the corrosive acids formed by combustion and
prevent the formation of sludge which can block the oilways. Additional oil additives should not be used. Always
adhere to the recommended servicing intervals.
WARNING: Many liquids and other substances used in motor vehicles are poisonous. They must
not be consumed and must be kept away from open wounds. These substances, among others,
include anti-freeze, windscreen washer additives, lubricants and various adhesives.

MAINTENANCE
3
MAINTENANCE UNDER BONNET MAINTENANCE
UNDER BONNET COMPONENTS
A - RH drive
1.Brake fluid reservoir
2.Clutch fluid reservoir
3.Air cleaner element
4.Engine breather filter
5.Oil filler cap
6.Oil level dipstick
7.Heater/air conditioning unit
8.Windscreen washer reservoir
9.Power steering pump reservoir10.Intercooler and hoses
11.Radiator filler plug
12.Radiator
13.Oil cooler
14.Fuel filter
15.Accelerator linkage
16.Expansion tank
17.Air cleaner dump valve

10MAINTENANCE
4
MAINTENANCE
UNDER BONNET COMPONENTS
B - LH drive
1.Brake fluid reservoir
2.Clutch fluid reservoir
3.Air cleaner element
4.Engine breather filter
5.Oil filler cap
6.Oil level dipstick
7.Heater/air conditioning unit
8.Windscreen washer reservoir
9.Power steering pump reservoir10.Intercooler and hoses
11.Radiator filler plug
12.Radiator
13.Oil cooler
14.Fuel filter
15.Accelerator linkage
16.Expansion tank
17.Air cleaner dump valve