2002 LAND ROVER DISCOVERY wiring

PANEL REPAIRS
77-2-48 REPAIRS
Cross member outer rear panel (RH/LH
section)
In this procedure, the panel body side assembly and
the 'E' post assembly are replaced in conjunction
with either the RH or LH section of the cross member
outer rear panel.
Remove
1.Disconnect both battery leads, negative lead
first.
2.Disconnect leads/multiplug from alternator.
3.Remove 'E' post assembly.

+ PANEL REPAIRS, REPAIRS, 'E' post
assembly.
4.Remove rear folding step.

+ EXTERIOR FITTINGS, REPAIRS,
Rear folding step.
5. LH side: Remove exhaust tailpipe heatshield.
6.Remove relevant wiring.
Repair
1.Remove existing panel(s), prepare panel joint
faces and install new panel(s) in accordance
with Panel Replacement Procedure. Punch or
drill holes in new panel for plug welding as
shown.
Refit
1.Fit and secure wiring.
2. LH side: Fit exhaust tailpipe heatshield.
3.Fit rear folding step.

+ EXTERIOR FITTINGS, REPAIRS,
Rear folding step.
4.Fit 'E' post assembly.

+ PANEL REPAIRS, REPAIRS, 'E' post
assembly.
5.Connect leads/multiplug to alternator.
6.Connect battery leads, negative lead last.
Cross member closing rear panel
In this procedure, the cross member outer rear panel
is replaced in conjunction with the cross member
closing rear panel. The cross member rear assembly
can also be replaced, if required.
Remove
1.Disconnect both battery leads, negative lead
first.
2.Disconnect leads/multiplug from alternator.
3.Remove cross member outer rear panel.

+ PANEL REPAIRS, REPAIRS, Cross
member outer rear panel.
4.Remove fuel tank.

+ FUEL DELIVERY SYSTEM - V8,
REPAIRS, Tank - fuel.

+ FUEL DELIVERY SYSTEM - Td5,
REPAIRS, Tank - fuel.
5.Remove 2 rear bolts securing body rear to
chassis.
Repair
1.Remove existing panel(s), prepare panel joint
faces and install new panel(s) in accordance
with Panel Replacement Procedure. Punch or
drill holes in new panel for plug welding as
shown.
Refit
1.Fit 2 rear bolts securing body rear to chassis
and tighten to 45 Nm (33 lbf.ft).
2.Fit fuel tank.

+ FUEL DELIVERY SYSTEM - V8,
REPAIRS, Tank - fuel.

+ FUEL DELIVERY SYSTEM - Td5,
REPAIRS, Tank - fuel.
3.Fit cross member rear outer panel.

+ PANEL REPAIRS, REPAIRS, Cross
member outer rear panel.
4.Connect leads/multiplug to alternator.
5.Connect battery leads, negative lead last.

PANEL REPAIRS
77-2-50 REPAIRS
Rear floor complete assembly
Remove
1.Disconnect both battery leads, negative lead
first.
2.Disconnect leads/multiplug from alternator.
3.Remove loadspace carpet.

+ INTERIOR TRIM COMPONENTS,
REPAIRS, Carpet - loadspace.
4.Remove rear seats.

+ SEATS, REPAIRS, Seat - rear.
5.Remove rear carpet.

+ INTERIOR TRIM COMPONENTS,
REPAIRS, Carpet - rear.
6.Remove rear bumper assembly.

+ EXTERIOR FITTINGS, REPAIRS,
Bumper assembly - rear - up to 03MY.
7.Remove RH and LH mud flap and brackets.
8.Remove exhaust tail pipe heatshields.
9.Remove tread plates from rear door apertures.
10.Remove rear door aperture seal.
11.Remove tail door tread plate.
12.Remove loadspace carpet retainer.
13.Remove head lining rear trim finisher.
14.Remove tail door aperture seal.
15.Remove bolts securing body to chassis.
16.Remove relevant wiring from floor area.Repair
M77 1712A
M77 1721A

PANEL REPAIRS
REPAIRS 77-2-51
1.Remove existing panel(s), prepare panel joint
faces and install new panel(s) in accordance
with Panel Replacement Procedure. Punch or
drill holes in new panel for plug welding as
shown.
Refit
1.Position and secure wiring.
2.Fit and tighten bolts securing body to chassis to
45 Nm (33 lbf.ft).
3.Fit tail door aperture seal.
4.Fit head lining rear trim finisher.
5.Fit loadspace carpet retainer.
6.Fit tail door tread plate.
7.Fit rear door aperture seals.
8.Fit tread plate to rear door apertures.
9.Fit exhaust tail pipe heatshields.
10.Fit mud flap bracklets and mud flaps.
11.Fit rear bumper assembly.

+ EXTERIOR FITTINGS, REPAIRS,
Bumper assembly - rear - up to 03MY.
12.Fit rear carpet.

+ INTERIOR TRIM COMPONENTS,
REPAIRS, Carpet - rear.
13.Fit rear seats.

+ SEATS, REPAIRS, Seat - rear.
14.Fit loadspace carpet.

+ INTERIOR TRIM COMPONENTS,
REPAIRS, Carpet - loadspace.
15.Connect leads/multiplug to alternator.
16.Connect battery leads, negative lead last.
Rear floor (rear section)
In this procedure, the cross member rear assembly,
cross member outer rear panel, cross member
closing rear panel, 'E' post assembly, 'E' post closing
assembly and the panel body side assembly are
replaced in conjunction with the rear floor (rear
section).
Remove
1.Disconnect both battery leads, negative lead
first.
2.Disconnect leads/multiplug from alternator.
3.Remove cross member rear assembly.

+ PANEL REPAIRS, REPAIRS, Cross
member rear assembly.
4.Remove mud flap mounting brackets.
5. LH side: Remove exhaust heatshield from rear
floor.
Repair
1.Remove existing panel(s), prepare panel joint
faces and install new panel(s) in accordance
with Panel Replacement Procedure. Punch or
drill holes in new panel for plug welding as
shown. Welds for RH side are symmetrically
opposite to those shown.
Refit
1. LH side: Fit exhaust heatshield to rear floor.
2.Fit mud flap mounting brackets.
3.Fit cross member rear assembly.

+ PANEL REPAIRS, REPAIRS, Cross
member rear assembly.
4.Connect leads/multiplug to alternator.
5.Connect battery leads, negative lead last.

PANEL REPAIRS
77-2-52 REPAIRS
Rear floor (RH/LH section)
In this procedure, the cross member rear assembly,
cross member outer rear panel (RH/LH section),
cross member closing rear panel, 'E' post assembly,
'E' post closing assembly and the panel body side
assembly are replaced in conjunction with the rear
floor (RH/LH section).
Remove
1.Disconnect both battery leads, negative lead
first.
2.Disconnect leads/multiplug from alternator.
3.Remove cross member rear assembly.

+ PANEL REPAIRS, REPAIRS, Cross
member rear assembly.
4.Remove mud flap mounting brackets.
5. LH side: Remove exhaust heatshield from rear
floor.
Repair
1.Remove existing panel(s), prepare panel joint
faces and install new panel(s) in accordance
with Panel Replacement Procedure. Punch or
drill holes in new panel for plug welding as
shown.
Refit
1. LH side: Fit exhaust heatshield to rear floor.
2.Fit mud flap mounting brackets.
3.Fit cross member rear assembly.

+ PANEL REPAIRS, REPAIRS, Cross
member rear assembly.
4.Connect leads/multiplug to alternator.
5.Connect battery leads, negative lead last.
Roof assembly
Remove
1.Disconnect both battery leads, negative lead
first.
2.Disconnect leads/multiplug from alternator.
3. Models with sunroof: Remove front sunroof.

+ SUNROOF, REPAIRS, Sunroof -
front.
4. Models with sunroof: Remove rear sunroof.

+ SUNROOF, REPAIRS, Sunroof -
rear.
5. Models with sunroof: Release sunroof drain
tubes and position aside.
6. Models with fixed roof: Remove head lining.

+ INTERIOR TRIM COMPONENTS,
REPAIRS, Headlining.
7.Remove front seats.

+ SEATS, REPAIRS, Seat - front.
8.Remove rear seats.

+ SEATS, REPAIRS, Seat - rear.
9.Remove rear headrests, if fitted.
10.Remove roof bars, if fitted.

+ EXTERIOR FITTINGS, REPAIRS,
Roof bars.
11.Remove tread plates from front door apertures.
12.Remove 'A' post lower trim panels.
13.Remove front door aperture seals.
14.Remove tread plates from rear door apertures.
15.Remove rear door aperture seals.
16.Remove 'D' post outer trim finisher.
17.Remove windscreen.

+ SCREENS, REPAIRS, Windscreen.
18.Remove alpine light glass.

+ SCREENS, REPAIRS, Glass - alpine
light.
19.Remove side and rear drip rail finishers.
20.Release relevant wiring and position aside.

PANEL REPAIRS
REPAIRS 77-2-53
Repair
1.Remove existing panel(s), prepare panel joint
faces and install new panel(s) in accordance
with Panel Replacement Procedure. Punch or
drill holes in new panel for plug welding as
shown.
2. During welding operations, apply 'Heat
shrink paste' to roof and body side panel to
avoid heat damage to paintwork.Refit
1.Fit and secure wiring.
2.Fit side and rear drip rail finishers.
3.Fit alpine light glass.

+ SCREENS, REPAIRS, Glass - alpine
light.
4.Fit windscreen.

+ SCREENS, REPAIRS, Windscreen.
5.Fit 'D' post outer trim finishers.
6.Fit rear door aperture seals.
7.Fit tread plates to rear door apertures.
8.Fit front door aperture seals.
9.Fit 'A' post lower trim panels.
10.Fit tread plates to front door apertures.
11.Fit roof bars.

+ EXTERIOR FITTINGS, REPAIRS,
Roof bars.
12.Fit rear headrests.
13.Fit rear seats.

+ SEATS, REPAIRS, Seat - rear.
14.Fit front seats.

+ SEATS, REPAIRS, Seat - front.
15. Models with fixed roof: Fit head lining.

+ INTERIOR TRIM COMPONENTS,
REPAIRS, Headlining.
16. Models with sunroof: Fit sunroof drain tubes.
17. Models with sunroof: Fit rear sunroof.

+ SUNROOF, REPAIRS, Sunroof -
rear.
18. Models with sunroof: Fit front sunroof.

+ SUNROOF, REPAIRS, Sunroof -
front.
19.Connect leads/multiplug to alternator.
20.Connect battery leads, negative lead last.
M77 1715A

HEATING AND VENTILATION
80-4DESCRIPTION AND OPERATION
Air inlet duct
RH drive shown, LH drive similar
1Air outlet
2Resistor pack
3Wiring harness
4Blower
5Blower relay6Recirculated air servo motor
7Recirculated air inlet
8Recirculated air inlet
9Fresh air inlet
10Control flap operating mechanism
The air inlet duct is installed behind the fascia, on the passenger's side. The air inlet duct is connected to the plenum
to provide the fresh air inlet. Two grilles in the air inlet duct provide recirculated air inlets from the cabin. Two control
flaps, operated by a servo motor, open and close the fresh and recirculated air inlets to control the source of incoming
air. Operation of the servo motor is controlled by a switch on the control panel.
The blower is installed between the air inlets and the outlet to the heater assembly, and consists of an open hub,
centrifugal fan powered by an electric motor. Operation of the blower is controlled by a slider switch on the control
panel, via a blower relay mounted on the air inlet duct and a resistor pack. The resistor pack is installed in the air outlet
from the blower fan, so that any heat generated is dissipated by the air flow. A wiring harness on the air inlet duct
connects the servo motor, blower motor, blower relay and resistor pack to the vehicle wiring.

HEATING AND VENTILATION
80-10DESCRIPTION AND OPERATION
FBH unit
1Air inlet hose
2Electrical connectors
3Exhaust pipe
4Quick disconnect coupling5Coolant inlet hose
6Fuel supply line
7Circulation pump
8Coolant outlet hose
The FBH unit is installed on the bulkhead in the engine compartment, on the side opposite the brake servo, and is
connected in series in the coolant supply to the heater assembly. Two electrical connectors on the top of the FBH unit
connect to the vehicle wiring.
FBH unit connector pin details
Connector/Pin
No.Description Input/Output
C0925
2 K line (diagnostics) Input/Output
3 Alternator power supply Input
6 FBH fuel pump Output
C0926
1 Battery power supply Input
2Earth -

BODY CONTROL UNIT
DESCRIPTION AND OPERATION 86-3-19
Operation
For IDM inputs which are also inputs for BCU functions, the delay before the BCU recognises the change in input
status is less than 250 ms. The BCU uses a debounce algorithm to ignore changes in input having a duration less
than 100 ms with the exception of automatic gearbox W, X, Y, Z inputs, which have a debounce period of 33 ms.
Transit mode
To prevent excessive battery drain during transit to overseas markets, the vehicle is placed in a transit mode.
To exit the transit mode, simultaneously hold down the heated rear window switch and the rear fog lamp switch, turn
the ignition switch from 0 to II and, after a minimum of 2 seconds, release the switches.
Transit mode can be entered using TestBook. When TestBook communicates with the BCU for diagnostics related to
BCU operation, it first checks that the vehicle is not in transit mode.
Anti-theft system
The BCU uses the driver's door key lock and unlock switches to activate and deactivate the security system. The
driver's door lock is also used for entering the EKA.

+ ALARM SYSTEM AND HORN, DESCRIPTION AND OPERATION, Description.
Immobilisation
For immobilisation, the BCU disables the starter motor relay. When the engine is cranking, the ECM looks for a coded
signal from the BCU. If the signal is not received within one second of cranking, the fuel supply to the engine is
stopped and the injectors are disabled. This also prevents unburnt fuel from entering the catalyst.
If the BCU is disconnected, the engine starter motor will remain isolated by the starter motor relay and the ECM will
remain immobilised. The main wiring for the system is contained within the main harness which is relatively
inaccessible, so preventing intruders from disabling the system by cutting the wires for the immobilisation system.
Once the immobiliser has been activated, destruction of the trigger device or the wiring to it will not disarm the system.
The RF transmitter communicates to the BCU via the RF receiver using a 70 bit code. Pressing the unlock button on
the transmitter will re-mobilise the vehicle. The RF transponder is integrated into the metal key assembly, inserting
the key into the ignition switch will induce a signal in the exciter coil to re-mobilise the vehicle.
Anti-theft alarm
The alarm system provides a warning of unauthorised access to the vehicle and includes perimetric and volumetric
monitoring under the control of the BCU.
The perimetric protection system detects opening of all doors, tail door and bonnet and will also detect the operation
of the ignition key switch. The following conditions must be satisfied before the BCU will operate all of the functions
of perimetric protection:
lAll doors and hinged panels are in the closed position.
lIgnition key out of the ignition switch.
lInertia switch is not tripped.
If all conditions are not satisfied the BCU will enter a mislock condition.
The volumetric sensor uses two ultrasonic sensors mounted in the headlining to detect movement within the vehicle.
The alarm will trigger when the sensor signals the BCU for 200 ms or greater. Within a single setting period the alarm
system will allow a maximum of 10 triggers as a result of any combination of sensor inputs. It is possible to lock the
vehicle without enabling the volumetric alarm by using the key. The same conditions needed to satisfy enabling of the
perimetric protection system is also needed to enable volumetric protection.