1999 LAND ROVER DISCOVERY bonnet

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
CONTENTS 19
EXTERIOR FITTINGS ............................................................................... 76-2-1
REPAIRS
Wing - front - up to 03MY ................................................................................................................ 76-2-1
Wing - front - from 03MY ................................................................................................................. 76-2-2
Rear folding step ............................................................................................................................ 76-2-4
Liner - wheel arch - front ................................................................................................................. 76-2-5
Liner - wheel arch - rear ................................................................................................................. 76-2-6
Panel - underbelly .......................................................................................................................... 76-2-7
Mirror - exterior - electric ................................................................................................................ 76-2-7
Roof bars ....................................................................................................................................... 76-2-8
Bonnet ........................................................................................................................................... 76-2-9
Cable - bonnet release - up to 03MY .............................................................................................. 76-2-9
Cable - bonnet release - from 03MY ............................................................................................... 76-2-11
Bumper assembly - front ............................................................................................................... 76-2-12
Bumper assembly - rear - from 03MY ............................................................................................. 76-2-13
Trim finisher - bumper - front - from 03MY ...................................................................................... 76-2-14
Bumper assembly - rear - up to 03MY ............................................................................................ 76-2-15
Side finisher - windscreen .............................................................................................................. 76-2-16
Grille - front - up to 03MY................................................................................................................ 76-2-16
Grille - front - from 03MY ................................................................................................................ 76-2-17
INTERIOR TRIM COMPONENTS ............................................................. 76-3-1
REPAIRS
Trim casing - tail door speaker ...................................................................................................... 76-3-1
Trim casing - side - loadspace ....................................................................................................... 76-3-2
Trim casing - upper - 'B' post ......................................................................................................... 76-3-3
Trim casing - lower - 'B' post ......................................................................................................... 76-3-3
Trim casing - 'D' post ...................................................................................................................... 76-3-4
Console - centre - automatic models .............................................................................................. 76-3-5
Console - centre - manual models .................................................................................................. 76-3-7
Fascia ............................................................................................................................................. 76-3-10
Panel - auxiliary switch ................................................................................................................... 76-3-14
Panel - fascia access - driver's side .............................................................................................. 76-3-15
Drink tray assembly - centre fascia ................................................................................................. 76-3-15
Louvre panel assembly - centre fascia ........................................................................................... 76-3-16
Carpet - front ................................................................................................................................... 76-3-18
Carpet - rear .................................................................................................................................. 76-3-19
Carpet - loadspace ......................................................................................................................... 76-3-20
Headlining ...................................................................................................................................... 76-3-20
Stowage pocket - front .................................................................................................................. 76-3-24

CONTENTS
22 CONTENTS
PANEL REPAIRS...................................................................................... 77-2-1
REPLACEMENT PANELS
Replacement panels ....................................................................................................................... 77-2-1
Front end inner panels .................................................................................................................... 77-2-2
Valance panels .............................................................................................................................. 77-2-3
Body side panels ............................................................................................................................ 77-2-4
Body side assembly ........................................................................................................................ 77-2-5
'D'-post assembly............................................................................................................................ 77-2-6
Rear floor assembly. ....................................................................................................................... 77-2-7
Rear end panels ............................................................................................................................ 77-2-8
Front and rear doors ....................................................................................................................... 77-2-9
Taildoor ........................................................................................................................................... 77-2-10
Roof panels..................................................................................................................................... 77-2-11
Replacement panels ....................................................................................................................... 77-2-12
PROCEDURES
General welding precautions .......................................................................................................... 77-2-13
Electronic control units.................................................................................................................... 77-2-14
PROCEDURES
Panel replacement procedure......................................................................................................... 77-2-15
REPAIRS
Front bulkhead assembly................................................................................................................ 77-2-21
Bonnet locking platform .................................................................................................................. 77-2-23
Front cross member........................................................................................................................ 77-2-24
Headlamp mounting panel - RH ..................................................................................................... 77-2-25
Headlamp mounting panel - LH ...................................................................................................... 77-2-26
Valance upper assembly - LH......................................................................................................... 77-2-28
Valance upper assembly - RH ........................................................................................................ 77-2-29
Valance upper assembly (front section) - LH.................................................................................. 77-2-30
Valance upper assembly (front section) - RH ................................................................................. 77-2-32
Front valance assembly - RH ......................................................................................................... 77-2-33
Front valance assembly - LH ......................................................................................................... 77-2-34
'A' post assembly ............................................................................................................................ 77-2-35
Dash side assembly........................................................................................................................ 77-2-37
Sill outer assembly.......................................................................................................................... 77-2-38
Sill inner assembly .......................................................................................................................... 77-2-39
'B/C' post assembly ........................................................................................................................ 77-2-40
Panel body side assembly .............................................................................................................. 77-2-41
Body side inner rear assembly ....................................................................................................... 77-2-43
'D' post outer assembly................................................................................................................... 77-2-44
Wheelarch rear outer assembly ...................................................................................................... 77-2-45
'E' post assembly ............................................................................................................................ 77-2-46
'E' post closing assembly ................................................................................................................ 77-2-47
Cross member outer rear panel ...................................................................................................... 77-2-47
Cross member outer rear panel (centre section) ............................................................................ 77-2-48
Cross member outer rear panel (RH/LH section) ........................................................................... 77-2-49
Cross member closing rear panel ................................................................................................... 77-2-49
Cross member rear assembly......................................................................................................... 77-2-50
Cross member rear assembly (RH/LH section) .............................................................................. 77-2-50
Rear floor complete assembly ........................................................................................................ 77-2-51
Rear floor (rear section) .................................................................................................................. 77-2-52
Rear floor (RH/LH section) ............................................................................................................. 77-2-53
Roof assembly ............................................................................................................................... 77-2-53
TIMES
TIME SCHEDULES ........................................................................................................................ 77-2-55

CONTENTS
26 CONTENTS
LIGHTING.................................................................................................. 86-2-1
ADJUSTMENTS
Headlamps beam alignment - up to 03MY ..................................................................................... 86-2-1
Headlamps beam alignment - from 03MY ...................................................................................... 86-2-2
REPAIRS
Lamp - front repeater - up to 03MY ................................................................................................ 86-2-3
Headlamp - up to 03MY .................................................................................................................. 86-2-4
Headlamp - from 03MY .................................................................................................................. 86-2-5
Lamp - tail ..................................................................................................................................... 86-2-6
Lamp - front fog up to 03MY ........................................................................................................... 86-2-6
Lamp - front fog from 03MY ............................................................................................................ 86-2-7
Housing - number plate lamp ......................................................................................................... 86-2-8
Motor - headlamp levelling ............................................................................................................ 86-2-9
Lamp - stop - centre high mounted (CHMSL) .............................................................................. 86-2-10
Lamp - tail/flasher - bumper ............................................................................................................ 86-2-10
Lamp - interior - front .................................................................................................................... 86-2-11
Lamp - interior - rear ..................................................................................................................... 86-2-11
Rheostat - panel lights dimmer ...................................................................................................... 86-2-12
Switch - hazard warning ................................................................................................................ 86-2-13
Switch - indicator and exterior lighting - combined ......................................................................... 86-2-13
Socket - accessory ........................................................................................................................ 86-2-14
Switch - front/rear fog lamps ......................................................................................................... 86-2-14
BODY CONTROL UNIT ............................................................................ 86-3-1
DESCRIPTION AND OPERATION
Description ...................................................................................................................................... 86-3-1
Operation ........................................................................................................................................ 86-3-19
REPAIRS
Body control unit (BCU) .................................................................................................................. 86-3-35
ALARM SYSTEM AND HORN.................................................................. 86-4-1
DESCRIPTION AND OPERATION
Alarm system component layout..................................................................................................... 86-4-2
Alarm system block diagram........................................................................................................... 86-4-4
Description ...................................................................................................................................... 86-4-5
Operation ........................................................................................................................................ 86-4-17
REPAIR
Switch - central door locking ......................................................................................................... 86-4-25
Switches - horn ............................................................................................................................. 86-4-25
Vehicle horn .................................................................................................................................. 86-4-26
Sounder - alarm ............................................................................................................................ 86-4-26
Sounder - battery backed-up (BBUS) ............................................................................................. 86-4-27
Switch - bonnet ............................................................................................................................. 86-4-27
Receiver - alarm system - models with sunroof ............................................................................. 86-4-28
Receiver - alarm system - models without sunroof ......................................................................... 86-4-28
Coil - passive immobilisation ........................................................................................................ 86-4-29

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
03-27
Body Repairs
General
Body shells are of welded construction and bolted to
a chassis frame. Front and rear sections of the shell
are designed as 'energy absorbing' zones. This
means they are designed to deform progressively
when subjected to impact in order to minimise the
likelihood of injury to vehicle occupants.
It is essential that design dimensions and strength
are restored in accident rectification. It is important
that neither structural weakness nor excessive local
stiffness are introduced into the vehicle during body
repair.
Repairs usually involve a combination of operations
ranging from straightening procedures to renewal of
individual panels or panel assemblies. The repairer
will determine the repair method and this decision will
take into account a balance of economics between
labour and material costs and the availability of repair
facilities in both equipment and skills. It may also
involve considerations of the vehicles' downtime,
replacement vehicle availability and repair turn-
around time.
It is expected that a repairer will select the best and
most economic repair method possible, making use
of the facilities available. The instructions given are
intended to assist a skilled body repairer by
expanding approved procedures for panel
replacement. The objective is to restore the vehicle
to a safe running condition by carrying out a repair
which is as close as is feasible to original standard.
The results should not advertise to the experienced
eye that the vehicle has been damaged, although the
repair might not be identical in all respects to the
original factory build. Commercial bodyshop repair
facilities cannot always duplicate methods of
construction used during production.
Operations covered in this Manual do not include
reference to testing the vehicle after repair. It is
essential that work is inspected and suspension
geometry checked after completion. Where
necessary a road test of the vehicle should be carried
out, particularly where safety-related items are
concerned.
Where major units have been disconnected or
removed it is necessary to ensure that fluid levels are
checked and topped up where necessary. It is also
necessary to ensure that the repaired vehicle is in a
roadworthy condition in respect of tyre pressures,
lights, washer fluid etc. Body repairs often involve the removal of mechanical
and electrical units and associated wiring. Where
necessary, refer to the relevant section of the
Workshop Manual for removal and refitting
instructions.
Taking into consideration the differences in body
styles, suspension systems and engine and
transmission layouts, the location of the following
components as applicable to a particular vehicle is
critical:
lFront suspension upper damper mountings on
RH and LH chassis longitudinals.
lFront suspension or sub frame mountings.
lEngine mountings on RH and LH chassis
longitudinals.
lRear suspension upper damper mountings on
RH and LH chassis longitudinals.
lRear suspension mountings or lower pivots.
Additional points which can be used to check
alignment and assembly are:
lInner holes in cross member - side - main floor.
lHoles in front bulkhead.
lHoles in rear longitudinals.
lHoles in rear lower panels.
Apertures for windscreen, rear screen, bonnet and
doors can be measured and checked using the
dimensional information provided and also by
offering up an undamaged component as a gauge.
Straightening
Whenever possible, structural members should be
cold straightened under tension. Do not attempt to
straighten with a single pull but rework the damaged
area using a series of pulls, releasing tension
between each stage and using the opportunity to
check alignment.
Body jig
Unless damage is limited to cosmetic panels, all
repair work to body members must be carried out on
a body jig, to ensure that impact damage has not
spread into more remote parts of the structure.
Mounting on a jig will also ensure that the
straightening and panel replacement procedures do
not cause further distortion.
If original dimensions cannot be satisfactorily
restored by these methods, damaged structural
members should be replaced. Damaged areas
should be cut away using a high speed saw, NOT an
oxy-acetylene torch.
As a rule, body dimensions are symmetrical about
the centre line. A good initial check for distortion is
therefore to measure diagonally and to investigate
apparent differences in dimensions.

IDENTIFICATION NUMBERS
05-1
IDE NTIFICATION NUMBERS
Vehicle Identification Number
Location
The Vehicle Identification Number (VIN) plate is
stamped on a plate attached to the bonnet locking
platform. The VIN is also stamped in the following
locations:
lOn a plate behind the LH lower corner of the
windscreen.
lOn the chassis RH longitudinal behind the rear
wheel.
Bonnet locking platform VIN
Windscreen VINChassis VIN
VIN plate content
The VIN plate contains the following information.
aVehicle Identification Number (VIN)
bGross vehicle weight
cGross train weight
dMaximum front axle load
eMaximum rear axle load
fPaint code
gTrim code

TORQUE WRENCH SETTINGS
06-19
Body
TORQUE DESCRIPTION METRIC IMPERIAL
Front and rear door hinges 30 Nm (22 lbf.ft)
Tail door hinge bolts 34 Nm (25 lbf.ft)
Door frames10 Nm (7 lbf.ft)
Regulator to glass6 Nm (4.4 lbf.ft)
Chassis cross member 25 Nm (18 lbf.ft)
Bulkhead to chassis bolts 45 Nm (33 lbf.ft)
Body to chassis bolts 45 Nm (33 lbf.ft)
Quarter light glass to frame 10 Nm (7 lbf.ft)
Glass lift motor to regulator 5 Nm (3.7 lbf.ft)
Tail door hand rail 10 Nm (7 lbf.ft)
Latch and motor assembly 7 Nm (5.2 lbf.ft)
Door handle7 Nm (5.2 lbf.ft)
Damper to step17 Nm (13 lbf.ft)
Throttle pedal assembly 13 Nm (10 lbf.ft)
Step assembly to chassis 45 Nm (33 lbf.ft)
Wing to sill finisher bracket 17 Nm (13 lbf.ft)
Front wing to body 17 Nm (13 lbf.ft)
Door mirror4 Nm (3 lbf.ft)
Roof bars32 Nm (24 lbf.ft)
Bonnet release lever 10 Nm (7 lbf.ft)
Front bumper to crash cans 13 Nm (10 lbf.ft)
Front bumper to side mountings 13 Nm (10 lbf.ft)
Mudshield10 Nm (7 lbf.ft)
Rear bumper45 Nm (33 lbf.ft)
Grab handle to body 3 Nm (2.2 lbf.ft)
Fascia26 Nm (19 lbf.ft)
Fascia to steering column bracket 11 Nm (8 lbf.ft)
Front seat to floor45 Nm (33 lbf.ft)
Second row seats to floor 45 Nm (33 lbf.ft)
Third row seats to lower rear quarter 22 Nm (16 lbf.ft)
Sunroof tray to frame 2 Nm (1.5 lbf.ft)
Solenoid securing cap 11 Nm (8 lbf.ft)
Support stay to alternator 25 Nm (18 lbf.ft)
Sunroof glass3 Nm (2.2 lbf.ft)
Motor to sunroof tray 2 Nm (1.5 lbf.ft)
Drive cable assembly to frame 2.5 Nm (1.8 lbf.ft)
Front and rear door striker bolts 26 Nm (19 lbf.ft)
Tail door striker bolts 26 Nm (19 lbf.ft)