belt LAND ROVER DISCOVERY 1999 Workshop Manual

CONTENTS
CONTENTS 3
MAINTENANCE ........................................................................................ 10-1
PROCEDURES
V8 engine underbonnet view .......................................................................................................... 10-1
Diesel underbonnet view ................................................................................................................. 10-2
Seats and seat belts ...................................................................................................................... 10-3
Lamps, horns and warning indicators ............................................................................................. 10-5
Wipers and washers ...................................................................................................................... 10-5
Handbrake .................................................................................................................................. 10-6
Alarm handset battery ..................................................................................................................... 10-6
Road wheels ................................................................................................................................... 10-6
Tyres .............................................................................................................................................. 10-6
Brake pads, discs and calipers ....................................................................................................... 10-6
Road wheel speed sensors ............................................................................................................. 10-7
Brake fluid ....................................................................................................................................... 10-7
Fuel filter - diesel engine ................................................................................................................. 10-7
Fuel filter sedimenter ...................................................................................................................... 10-7
Road wheels ................................................................................................................................... 10-8
Radiator/Intercooler ........................................................................................................................ 10-8
Ambient air Temperature and pressure sensor .............................................................................. 10-8
Doors, bonnet and fuel filler flap ..................................................................................................... 10-8
Air suspension intake filter .............................................................................................................. 10-9
Anti-freeze....................................................................................................................................... 10-9
Cooling system ............................................................................................................................... 10-9
Spark plugs - V8 engine.................................................................................................................. 10-10
Air cleaner - V8 engine ................................................................................................................... 10-10
Air cleaner and dump valve - diesel engine .................................................................................... 10-10
Auxiliary drive belt ........................................................................................................................... 10-11
Auxiliary drive belt - V8 engine ....................................................................................................... 10-11
Auxiliary drive belt - diesel engine .................................................................................................. 10-11
Fluid reservoirs ............................................................................................................................... 10-12
Steering box .................................................................................................................................... 10-13
Battery ............................................................................................................................................. 10-13
Intercooler - diesel engine............................................................................................................... 10-14
Engine oil - V8 engine ..................................................................................................................... 10-14
Engine oil - diesel engine ................................................................................................................ 10-15
Centrifuge rotor – diesel engine ...................................................................................................... 10-15
Engine oil filter - diesel engine ........................................................................................................ 10-16
Engine oil filter – V8 engine ............................................................................................................ 10-16
Manual gearbox .............................................................................................................................. 10-17
Automatic gearbox ......................................................................................................................... 10-18
Transfer box .................................................................................................................................... 10-19
Front and rear axle .......................................................................................................................... 10-20
Propeller shafts ............................................................................................................................... 10-20
Anti-roll bar links ............................................................................................................................. 10-22
ACE actuators ................................................................................................................................. 10-23
ACE filter ......................................................................................................................................... 10-23

CONTENTS
18 CONTENTS
RESTRAINT SYSTEMS ............................................................................ 75-1
DESCRIPTION AND OPERATION
SRS component layout ................................................................................................................... 75-1
SRS block diagram ......................................................................................................................... 75-2
Description - SRS ........................................................................................................................... 75-3
Operation - SRS ............................................................................................................................. 75-9
DESCRIPTION AND OPERATION
Description - seat belts ................................................................................................................... 75-11
REPAIRS
Seat belt - front .............................................................................................................................. 75-13
Seat belt - rear - centre ................................................................................................................. 75-13
Seat belt - rear - side .................................................................................................................... 75-15
Mounting - seat belt - 'B' post ...................................................................................................... 75-16
Seat belts - third row ....................................................................................................................... 75-17
Pre-tensioner - front seat belt ....................................................................................................... 75-18
Pre-tensioner - seat belt - front - deployment - in vehicle ............................................................... 75-19
Pre-tensioner - seat belt - front - deployment - off vehicle .............................................................. 75-20
Airbag module - drivers .................................................................................................................. 75-22
Airbag module - passenger ........................................................................................................... 75-23
DCU ................................................................................................................................................ 75-24
Air bag - steering wheel - deployment - off vehicle ......................................................................... 75-25
Air bag - fascia - passenger - deployment - in vehicle ................................................................... 75-26
Air bag - fascia - passenger - deployment - off vehicle .................................................................. 75-27
Rotary coupler ................................................................................................................................ 75-29
DOORS...................................................................................................... 76-1-1
REPAIRS
Door - front .................................................................................................................................... 76-1-1
Door - rear .................................................................................................................................... 76-1-2
Door - tail ........................................................................................................................................ 76-1-3
Glass - front or rear door .............................................................................................................. 76-1-5
Quarter light ................................................................................................................................... 76-1-6
Regulator and motor - front and rear door glass .......................................................................... 76-1-7
Trim casing - front door .................................................................................................................. 76-1-8
Trim casing - rear door .................................................................................................................. 76-1-9
Trim casing - tail door .................................................................................................................... 76-1-10
Latch and motor - front door .......................................................................................................... 76-1-11
Latch and motor - rear door ........................................................................................................... 76-1-12
Latch and motor - tail door ............................................................................................................ 76-1-13
Handle - exterior - rear door ......................................................................................................... 76-1-13
Handle - exterior - tail door ........................................................................................................... 76-1-14
Handle - exterior - front door .......................................................................................................... 76-1-14

CONTENTS
CONTENTS 25
WIPERS AND WASHERS ........................................................................ 84-1
DESCRIPTION AND OPERATION
Wipers and washers component layout .......................................................................................... 84-1
Front wiper components ................................................................................................................. 84-2
Rear wiper components .................................................................................................................. 84-3
Washer components ....................................................................................................................... 84-4
Wipers and washers block diagram ................................................................................................ 84-6
Description ...................................................................................................................................... 84-8
Operation ........................................................................................................................................ 84-17
REPAIRS
Reservoir - washer - up to 03MY .................................................................................................... 84-21
Reservoir - washer - from 03MY ..................................................................................................... 84-22
Jet - washer - windscreen ............................................................................................................... 84-23
Pump - washer - screen and headlamp ....................................................................................... 84-24
Motor and linkage - wiper - windscreen .......................................................................................... 84-25
Switch - wiper and washer - windscreen ......................................................................................... 84-26
Jet - washer - headlamp ................................................................................................................ 84-27
Jet - washer - rear screen ............................................................................................................ 84-27
Switch - rear wash .......................................................................................................................... 84-28
Motor - wiper - rear screen ............................................................................................................. 84-29
Switch - wiper - rear - up to 03MY .................................................................................................. 84-30
Switch - wiper - rear - from 03MY ................................................................................................... 84-30
CHARGING AND STARTING ................................................................... 86-1-1
REPAIRS
Alternator - diesel .......................................................................................................................... 86-1-1
Alternator - V8 ................................................................................................................................. 86-1-3
Belt - auxiliary drive ......................................................................................................................... 86-1-4
Battery ............................................................................................................................................ 86-1-4
Battery carrier ................................................................................................................................ 86-1-5
Starter motor - diesel ...................................................................................................................... 86-1-6
Starter motor - V8 ........................................................................................................................... 86-1-7

GENERAL INFORMATION
03-18
Ignition system safety precautions
The vehicle's ignition system produces high voltage
and the following precautions should be observed
before carrying out any work on the system.
WARNING: Before commencing work on an
ignition system, ensure all high tension
terminals, adapters and diagnostic equipment
are adequately insulated and shielded to prevent
accidental personal contacts and minimise the
risk of shock. Wearers of surgically implanted
pacemaker devices should not be in close
proximity of ignition circuits or diagnostic
equipment.
Disciplines
Switch off the ignition prior to making any connection
or disconnection in the system to prevent electrical
surges caused by disconnecting 'live' connections
damaging electronic components.
Ensure hands and work surfaces are clean and free
of grease, swarf, etc. Grease collects dirt which can
cause electrical tracking (short-circuits) or high-
resistance contacts.
When handling printed circuit boards, treat with care
and hold by the edges only; note that some electronic
components are susceptible to body static.
Connectors should never be subjected to forced
removal or refit, especially inter-board connectors.
Damaged contacts can cause short-circuit and open-
circuit fault conditions.
Prior to commencing test, and periodically during a
test, touch a good vehicle body earth to discharge
static charge. Some electronic components are
vulnerable to the static electricity that may be
generated by the operator.
Grease for electrical connectors
Some under bonnet and under body connectors may
be protected against corrosion by the application of a
special grease during vehicle production. Should
connectors be disturbed in service, repaired or
replaced, additional grease should be applied: Part
No. BAU 5811, available in 150 gm tubs.
NOTE: The use of greases other than BAU 5811
must be avoided as they can migrate into relays,
switches etc. contaminating the contacts and leading
to intermittent operation or failure.
Supplementary Restraint System
Precautions
General
The Supplementary Restraint System (SRS)
provides active protection for vehicle occupants in
the event of a serious collision. The system
components include airbags and pretensioner seat
belts which are automatically deployed when a
severe frontal crash condition is detected.
In order to assure system integrity, it is essential that
the SRS system is regularly checked and maintained
so that it is ready for operation in the event of an
accident.
The SRS system contains components which could
be potentially hazardous to the service engineer if
not serviced and handled correctly. The following
guidelines are intended to alert the service engineer
to potential sources of danger and emphasise the
importance of ensuring integrity of the SRS
components fitted to the vehicle.
Where necessary, additional specific precautions are
detailed in the Restraint Systems section of this
Manual which should be referred to prior to
commencing repair operations.
It should be noted that these precautions are not
restricted to operations performed when servicing
the SRS system. The same care should be exercised
when working on ancillary systems and components
located in the vicinity of SRS components; these
include but are not limited to steering system (driver's
airbag), body and trim components (passenger's
airbag and seat belt pretensioners) and electrical
system components (SRS harnesses etc.).

GENERAL INFORMATION
03-19
WARNING: Do not use rear facing child seats in
the front passenger seat if the vehicle is fitted
with a passenger airbag.
WARNING: It is imperative that before any work
is undertaken on the SRS system the appropriate
information is read thoroughly.
WARNING: Replace the airbag every 10 years.
Do not install used SRS parts from another car.
When repairing an SRS system, always use
approved new parts.
Carefully inspect the airbag module before
installing it. Do not install an airbag module that
shows signs of being dropped or improperly
handled, such as dents, cracks or deformation.
Do not try to disassemble or tamper with the
airbag module.
Special bolts are necessary for installing the
airbag module. Do not use other bolts.
Preliminary procedures
The SRS system uses energy reserve capacitors
that keep the system active in the event of electrical
supply failure under crash conditions. It is necessary
to allow the capacitors sufficient time to discharge in
order to avoid the risk of accidental deployment.
Always remove the ignition key from the starter
switch, disconnect the vehicle battery and wait 10
minutes before commencing work on the SRS
system.
Carefully inspect any SRS component before
installation. Do not install any SRS component that
shows signs of damage such as dents, cracks or
deformity.Component handling
The SRS components are sensitive and potentially
hazardous if not handled correctly; always comply
with the following handling precautions:
lNever drop an SRS component. The airbag
Diagnostic Control Unit (DCU) is a particularly
shock sensitive device and must be handled
with extreme care. Airbag modules and seat belt
pretensioner units could deploy if subjected to a
strong shock.
lNever wrap your arms around an airbag
module. If an airbag module has to be carried,
hold it by the cover, with the cover uppermost
and the base away from your body.
lNever transport airbag modules or seat belt
pretensioners in the cabin of a vehicle. Always
use the luggage compartment of the vehicle for
carrying airbag modules and seat belt
pretensioner units.
WARNING: The airbag module contains sodium
azide which is poisonous and extremely
flammable. Contact with water, acid or heavy
metals may produce harmful or explosive
compounds. Do not dismantle, incinerate or
bring into contact with electricity, before the unit
has been deployed.

GENERAL INFORMATION
03-20
Storage
Airbag modules and seat belt pretensioners are
classed as explosive devices. For overnight and
longer term storage, they must be stored in a secure
steel cabinet which has been approved as suitable
for the purpose and has been registered by the local
authority.
For the temporary storage of an airbag module or
seat belt pretensioner during service, place in a
designated storage area. If there is no designated
storage area available, store in the luggage
compartment of the vehicle and inform the workshop
supervisor. Always observe the following
precautions when temporarily storing an airbag
module:
lEnsure the cover is facing upwards and the
luggage compartment is secured.
lAlways keep components cool, dry and free
from contamination.
lDo not allow anything to rest on the airbag
module.
lStore any removed airbag assembly on a
secure flat surface away from electrical
equipment and heat sources exceeding 85°C
(185°F).
WARNING: Store the airbag module or seat belt
pre-tensioner in a designated storage area. If
there is no designated storage area available,
store in the locked luggage compartment/
loadspace of the vehicle and inform the
workshop supervisor.Installation and testing precautions
The integrity of SRS system components are critical
for safety reasons. Ensure the following precautions
are always adhered to:
lNever install used SRS components from
another vehicle or attempt to repair an SRS
component.
lWhen repairing an SRS system, only use
genuine new parts.
lNever apply electrical power to an SRS
component unless instructed to do so as part of
an approved test procedure.
lSpecial Torx bolts are necessary for installing
the airbag assembly. Do not use other bolts.
Ensure bolts are tightened to the specified
torque.
lEnsure that SRS component fixings are
correctly positioned and torqued during service
and repair.
lAlways use new fixings when replacing an SRS
component.
lEnsure the airbag DCU is always installed
correctly. There must not be any gap between
the DCU and the bracket to which it is mounted.
An incorrectly mounted unit could cause the
system to malfunction.
lThe airbag DCU is a non-serviceable
component and no attempt should be made to
repair or modify the unit.
lDo not try to disassemble the airbag assembly.
It has no serviceable parts. Once an airbag has
been deployed, it cannot be repaired or reused.
lIf you suspect an airbag assembly could be
defective, install a new unit and dispose of the
old unit. Manually deploy the old unit before
disposal.
WARNING: Keep clear of the deployment zone
when working on or near an airbag module.
Accidental deployment could cause serious
injury.

GENERAL INFORMATION
03-23
Airbag and pretensioner deployment
Deployment procedures and precautions as detailed
in this manual should be strictly adhered to. Only
personnel who have undergone the appropriate
training should undertake deployment of airbag and
pretensioner modules. The following precautions
must be complied with:
lOnly use deployment equipment approved for
the intended purpose.
lBefore beginning deployment procedure,
ensure deployment tool functions properly by
performing the self test procedure detailed in
SRS section of this manual.
lDeployment of airbag/ pretensioner modules
should be performed in a well ventilated area
which has been designated for the purpose.
lEnsure airbag/pretensioner modules are not
damaged or ruptured before attempting to
deploy.
lNotify the relevant authorities of intention to
deploy airbag and pretensioner units.
lWhen deploying airbag pretensioner units,
ensure that all personnel are at least 15 metres
(45 feet) away from the deployment zone.
lEnsure deployment tool is connected correctly,
in compliance with the instructions detailed in
the SRS section of this manual. In particular,
ensure deployment tool is NOT connected to
battery supply before connecting to airbag
module connector.
lWhen deploying seat belt pretensioners, ensure
pretensioner unit is secured correctly to the
seat.
lWhen removing deployed airbag modules and
pretensioner units, wear protective clothing.
Use gloves and seal deployed units in a plastic
bag.
lFollowing deployment of any component of the
SRS system within the vehicle, all SRS
components must be replaced. DO NOT re-use
or salvage any parts of the SRS system.
lDo not lean over airbag module when
connecting deployment equipment.
If a vehicle is to be scrapped, undeployed airbag
modules and pretensioner units must be manually
deployed. In this case airbags can be deployed in the
vehicle; before deployment, ensure the airbag
module is secure within its correct mounting position.
Deployment of the driver's airbag in the vehicle may
damage the steering wheel; if the vehicle is not being
scrapped, deploy the module outside of the vehicle.
WARNING: During deployment parts of the
airbag module become hot enough to burn you.
Wait 30 minutes after deployment before
touching the airbag module.
SRS Component Replacement Policy
The following information details the policy for
replacement of SRS components; either as a result
of a vehicle accident or as a result of vehicle age.
Impacts which do not deploy the airbags or pre-
tensioners
Check for structural damage in the area of the
impact, paying particular attention to bumper
armatures, longitudinals, crash cans and bracketry.
Impacts which deploy the airbags or pre-
tensioners
The replacement and inspection policy is dependent
on the type and severity of of the crash condition.
The following guidelines are the minimum that
should be exercised as a result of the deployment of
specific SRS components.
If the front airbags or seat belt pre-tensioners are
deployed, the following parts must be replaced:
lSRS DCU.
lDriver airbag module
lPassenger airbag module
lFront seat belt buckle pre-tensioners
lRotary coupler
lDriver's seat belt retractor
lFlyleads (where applicable) connecting airbags
and seat belt pre-tensioners to SRS harness
In addition, the following should be inspected for
damage and replaced as necessary:
lFront passenger's seat belt retractor (webbing,
tongue latching, 'D' loop, body anchorage point)
lRear seat belt buckles (webbing, buckle covers,
body anchorage and tongue latching function)
lFascia moulding adjacent to passenger airbag
module
lSteering wheel (if damage is evident)
lFront seat frames and head restraints (if there is
evidence of damage to the seat frame or
cushion pan)
lSteering column (if adjustment is lost or there
are signs of collapse)
lThird row seats, seat belts and head restraints
(where fitted). Check third row seat latching
mechanism operates correctly.
Periodic replacement of SRS components
The performance of the propellants within airbags
and pre-tensioners will deteriorate over a period of
time. As a result, it is essential that the airbags are
replaced after 10 years and seat belt pre-tensioners
are replaced after 15 years in order to maintain
occupant safety.

GENERAL DATA
04-9
Cooling system - Td5
Type Pressurised, spill return partial flow, thermostatically controlled
Cooling fans 11 blade axial flow on viscous coupling and 11 blade axial flow electric
Electric cooling fan switching points:
For A/C system:
⇒ On When vehicle speed is 50 mph (80 km/h) or less and ambient
temperature is 28 °C (82 °F) or more
⇒ Off When vehicle speed increases to 62.5 mph (100 km/h) or ambient
temperature decreases to 25 °C (77 °F)
For engine cooling during normal running:
⇒ On 110 °C (230 °F)
⇒ Off 105 °C (221 °F)
For engine cooling at ignition off (to counteract heat
soak):
⇒ On If, within 10 seconds of ignition off, engine coolant temperature is 105
°C (221 °F) or more
⇒ Off After 10 minutes or if engine coolant temperature decreases to 100 °C
(212 °F)
Coolant pump Centrifugal impeller, belt driven from crankshaft
Thermostat Waxstat with pressure relief valve
Thermostat opening temperature:
⇒ Initial opening 82 °C (179 °F)
⇒ Fully open 96 °C (204 °F)
Expansion tank cap relief valve - system operating
pressure1.4 bar (20.3 lbf.in
2)
Fuel cooler thermostat opening temperature 82°C (179°F)

GENERAL DATA
04-10
Cooling system - V8
Type Pressurised, spill return, thermostatically controlled water and
antifreeze mixture. Vertical flow radiator with remote header tank and
pump assisted
Cooling fans 9 blade axial flow on viscous coupling and 11 blade axial flow electric
Electric cooling fan switching points:
For A/C system:
⇒ On When vehicle speed is 50 mph (80 km/h) or less and ambient
temperature is 28 °C (82 °F) or more
⇒ Off When vehicle speed increases to (62.5 mph (100 km/h) or ambient
temperature decreases to 25 °C (77 °F)
For engine cooling during normal running:
⇒ On 100 °C (212 °F)
⇒ Off 94.5 °C (202 °F)
For engine cooling at ignition off (to counteract heat
soak):
⇒ On If, within 10 seconds of ignition off, intake air temperature is 60 °C (140
°F) or more and engine coolant temperature is 110 °C (230 °F) or more
⇒ Off After 10 minutes or if engine coolant temperature decreases to 100 °C
(212 °F)
Coolant pump Centrifugal impeller, belt driven from crankshaft
Coolant pump drive ratio 1.293 : 1
Coolant pump output at 1000 rev/min 10 litres/min (2.64 US galls/min) at 0.7 bar (10 lbf.in
2)
Thermostat Waxstat with pressure relief valve
Thermostat operating temperature:
⇒ Initial opening 82 °C (179 °F)
⇒ Fully open 96 °C (204 °F)
Expansion tank cap relief valve - system operating
pressure1.4 bar (20 lbf.in
2)

GENERAL DATA
04-17
Steering
Note: Measurements taken at EEC kerb weight.
Type Hydraulically assisted worm and roller
Steering wheel turns lock to lock 3.5
Steering wheel diameter 400 mm (15.7 in)
Turning circle, kerb to kerb 11.9 metres (39.1 feet)
PAS pump Hobourn Automotive Ltd. Series 500, belt driven
PAS pump pressure - engine at idle with steering at full lock 21 to 62 bar (305 to 900 lbf/in
2
Delivery pressure (nominal) 100 bar (1450 lbf.in2) 8.5 litres/min (15.1 pints/min)
(18.1 US pints/min)
Steering geometry:
⇒ Camber angle - Front, up to VIN 2A 754807 - unladen condition
⇒ Camber angle - Front, from VIN 2A 754808 - unladen condition
⇒ Camber angle - Rear - unladen condition–10' ± 30'
+20' ± 30'
–10' ± 30'
⇒ Cross camber - Front and rear 45' (Maximum)
⇒ Castor angle - unladen condition 3° 45' ± 45'
⇒ Cross castor 1° (Maximum)
⇒ Toe out - Front
⇒ Toe in - Rear– 0° 10' ± 0° 10' (total)
+ 0° 5' ± 0° 15' (total)
⇒ Thrust angle 0° ± 20'
⇒ Swivel pin inclination 13° 11'