Land Rover Defender 1999 Td5 Electrical Library Rover Manual

							FUSE DETAILS
DEFENDER 1999 MY2.3
Passenger compartment fuse box
Fuse Rating Wire
colourFunction
1 10 Amp WG Alarm ECU, BBUS.
2 15 Amp WG Windscreen wiper switch, windscreen wiper
motor, windscreen wiper delay ECU.
3 10 Amp WG Hazard warning switch, rear window wash/wipe
switch, rear window wiper motor, instrument pack,
coolant temperature gauge, fuel gauge, blower
relay, aircon unit.
4 10 Amp GO ABS ECU.
5 10 Amp WG ECU.
6 10 Amp GY Brake pedal switch, reverse lamp switch,
speed transducer, alternator/generator.
7 10 Amp WG Dim-Dip relay, headlamp relay, HRW relay,
instrument pack.
8 5 Amp P Diagnostic socket.
9 30 Amp NP Blower relay.
10 20 Amp NS Aircon compressor clutch relay, cooling fan relay. 
						

							FUSE DETAILS
2.4
DEFENDER 1999 MY
Fuse Rating Wire
colourFunction
11 10 Amp RB/R Lighting switch, LH front side lamp, LH tail lamp,
trailer pick-up.
12 10 Amp RO Lighting switch, RH front side lamp, RH tail lamp,
cigar lighter, dim-dip relay, headlamp levelling
switch, coolant temperature gauge sensor, fuel
gauge, LH heater control illumination, RH heater
control illumination, clock illumination, instrument
pack, blower motor switch, RH headlamp levelling
motor, LH headlamp levelling motor, aircon switch
pack.
13 20 Amp PG Cigar lighter, blower motor.
14 5 Amp WO Radio/Cassette player.
15 10 Amp UB/UR Dim-Dip relay, RH headlamp.
16 10 Amp UK/UR Dim-Dip relay, LH headlamp.
17 10 Amp UO/U-
WRH headlamp, instrument pack, column switch.
18 10 Amp US/UW LH headlamp, instrument pack, column switch.
19 10 Amp U/UP Rear fog lamp ECU, column switch, headlamp
relay, dim-dip relay.
20 10 Amp OR/PB Alarm sounder relay, horn switch, LH horn, RH
horn. 
						

							EARTH POINTS AND HEADER JOINTS
DEFENDER 1999 MY3.1
Earth points
The following illustration indicates the general position of the major earth points
and the earth header on 1999 MY Defender.
Connector
No.Title Location
C362 Earth eyelet Centre of engine compartment
bulkhead.
C556 Earth eyelet LH side of transfer box.
C557 Earth eyelet LH side of transfer box.
C558 Earth eyelet Beneath RH rear wheel arch.
C559 Earth eyelet Adjacent rear screen wiper motor.
C560 Earth eyelet Centre of engine compartment
bulkhead.
Earth header
Connector
No.Title Location
C550 Earth header Centre of engine compartment
bulkhead. 
						

							DESCRIPTION AND OPERATION
DEFENDER 1999 MY4.1
ANTI-THEFT ALARM
DESCRIPTION
Although a key is used in the normal way to lock and unlock the vehicle, this
will not arm the alarm system. The system is armed with an RF handset, which
transmits a rolling code. This code is received by the alarm ECU, which is
mounted behind the instrument pack.
The alarm system fitted to 1999 MY Defenders has two methods of protecting
the vehicle; perimetric protection, and volumetric protection.
Perimetric protection monitors the hinged panels of the vehicle; the bonnet, the
tail door, the drivers door, and all passenger doors. If any of these panels are
opened without the alarm ECU receiving the correct signal from the RF
handset, the alarm will be triggered.
Volumetric protection monitors the interior space within the passenger
compartment. When the alarm is armed, the volumetric sensor (mounted in the
headlining above the RH B post) will sense any movement and trigger the
alarm.
The alarm ECU also interacts with the Engine Control Module (ECM), causing
the engine to be immobilised whenever the alarm is armed.
See Engine
Immobilisation. 
						

							DESCRIPTION AND OPERATION
4.2
DEFENDER 1999 MY
OPERATION
The battery positive terminal provides a feed to the engine compartment fuse
box (C0632-1) on a brown wire. Fuse 6, fuse 7, fusible link 5 and fusible link 6
are all connected in parallel and provide a direct battery feed to the following;
·Fuse 6 (C0574-2) provides two feeds to the alarm ECU on purple/brown
wires. The first (C0061-25) is used as a power signal. The second
(C0057-8) is used to power the indicator lamp circuits (C0057-1 & C0057-6)
on green/white (RH indicators) and green/red (LH indicators) wires
respectively.
·Fuse 7 (C0574-1) provides a feed to the front interior lamp (C0355-3) on a
purple/brown then purple wire.
·Fusible link 5 (C0570-2) provides a feed to the BBUS (C0666-2) on a brown
then black wire, and the ignition switch (C0028-1) on a brown/white wire.
·Fusible link 6 (C0571-3) provides feeds to the alarm relay (C0731-6 &
C0731-8) on brown/blue wires, and the alarm LED (C1060-6) also on a
brown/blue wire.
The alarm ECU receives arm and disarm commands from the RF handset via
an aerial. The aerial (C1136-1) is connected to the alarm ECU (C0061-26) by a
orange/slate wire. When the alarm ECU is disarmed and the ignition switch is
set to the crank position, it provides an earth path (C0057-10) for the starter
relay (C0151-6) on a black/orange wire. This will enable the engine to be
started.
See Charging and Starting.
The Alarm ECU (C0061-14) also communicates with the ECM (C0658-34). It
sends a pulsed voltage signal along a light green/slate wire to control engine
immobilisation. The alarm ECU (C0057-12) also sends a constant battery feed
to the passive coil (C0049-2) on an orange/purple wire. A second pulsed
voltage signal is sent by the alarm ECU (C0057-7) to the passive coil
(C0049-1) on an orange/green wire.
See Engine Immobilisation. 
						

							DESCRIPTION AND OPERATION
DEFENDER 1999 MY4.3
The alarm ECU is connected to all the door switches (including the tail door)
and the bonnet switch. When the perimetric alarm system is armed, the ECU
monitors the switch circuits and detects open or grounded circuit. By monitoring
the circuits in this way, the alarm ECU can tell if any of the hinged panels are
open or closed. The alarm ECU is connected to the following switches;
·The alarm ECU (C0061-5) to the RH front door switch (C0054-1) on a
slate/white wire.
·The alarm ECU (C0061-16) to the LH front door switch (C0033-1) and the
tail door switch (C0615-1) on purple/blue wires.
·The alarm ECU (C0061-16) to the RH rear door switch (C0111-1) on a
purple/blue wire.
·The alarm ECU (C0061-16) to the LH rear door switch (C0112-1) on a
purple/blue wire.
·The alarm ECU (C0061-9) to the bonnet switch (C0007-2) on a orange/blue
wire.
When the doors and bonnet are closed, the switches are open. If any door is
opened, the respective switch closes to earth through the fixings. If the bonnet
is opened the switch (C0007-1) is earthed on a black wire.
For volumetric protection, when the alarm is armed, the alarm ECU (C0061-20)
provides a feed to the volumetric sensor (C0719-1) on a black/brown wire. The
sensor (C0719-2) is earthed on a black wire via the earth header (C0550-1).
When the alarm system is armed, the volumetric sensor (C0719-3) sends a
constant voltage signal back to the alarm ECU (C0061-3) on a white/black wire.
If the volumetric sensor is triggered, this changes to a pulsed signal. The alarm
ECU, recognising this fluctuation in voltage, triggers the alarm.
When the alarm is activated, the alarm ECU (C0057-5) provides an earth for
the alarm relay (C0731-4) on an orange/white wire. Current flows across the
relay switch (C0731-6 & C0731-2) and onto the alarm sounder (C0520-2) on a
orange/black wire. The alarm sounder (C0520-1) is earthed on a black wire. 
						

							DESCRIPTION AND OPERATION
4.4
DEFENDER 1999 MY
The energised alarm relay (C0731-5) also provides a feed to fuse 20 of the
passenger compartment fuse box (C0581-20) on an orange/red wire. Fuse 20
(C0581-19) then supplies a feed to the LH (C0003-2) and RH horns (C0004-2)
on purple/black wire.
By switching the earth path on and off, the alarm ECU can control the operation
of the sounder and the horns.
The alarm ECU (C0057-4) supplies a feed to the anti-theft alarm LED
(C1060-3) on a pink wire. Because the potential difference across the LED is 0
volts, the LED fails to illuminate.
To illuminate the LED, the alarm ECU (C0057-4) withdraws the feed on the
pink wire, and provides a path to earth. Current can now flow and illuminate the
LED. The alarm ECU can control the flashing sequence of the LED by
switching the feed/earth on the pink wire.
Depending on market, some vehicles are also fitted with a BBUS. The BBUS
has its own internal power supply. Should the vehicle battery or the sounder be
disconnected, the BBUS will sound for approximately 4
1/2minutes. To
disconnect the vehicle battery without sounding the alarm
See Repair Manual,
Maintenance, Battery Condition.
The BBUS (C0666-2) is supplied constant battery voltage from fusible link 5
(C0570-2). The BBUS (C0666-4) is earthed via earth header 550. A battery
voltage signal is also supplied to the BBUS (C0666-3) from the alarm ECU
(C0057-5). When the alarm is triggered, the alarm ECU withdraws this feed,
and the BBUS sounds.
The BBUS (C0666-1) also receives an ignition feed from fuse 1 of the
passenger compartment fuse box (C0580-2) on a white/green then black wire.
All connections to and from the BBUS are on black wires.
The alarm ECU also controls the operation of the interior lamps.
See Interior
Lamps. 
						

							DESCRIPTION AND OPERATION
DEFENDER 1999 MY4.5
ENGINE IMMOBILISATION - Td5
DESCRIPTION
The engine immobilisation system fitted to 1999 MY Defender works in
conjunction with the Alarm system. The alarm ECU sends a coded signal to the
Engine Control Module (ECM). If the signal does not match the one expected
by the ECM, the ECM will immobilise the engine.
Passive immobilisation is also fitted, with a passive coil fitted around the
ignition barrel. This will activate 30 seconds after the ignition is turned off and
the drivers door is opened. Alternatively, passive immobilisation will occur 5
minutes after the vehicle is unlocked, or the ignition is turned off. When
attempting to restart the vehicle, passive immobilisation can be switched off
using either the RF handset or EKA code.
OPERATION
Feed from the battery positive terminal is connected to fusible link 5 and fuse 6
of the engine compartment fuse box (C0632-1) by a brown wire. Fusible link 5
and fuse 6 are connected in parallel. Fuse 6 (C0574-2) supplies a constant
battery feed to the alarm ECU (C0061-25) on a purple/brown wire. Fusible link
5 (C0570-2) supplies a feed to the ignition switch (C0028-1) on a brown/white
wire.
When the ignition switch is turned to position II, current flows across the
switch (C0094-1) to fuse 1 of the passenger compartment fuse box (C0580-1)
on a white wire. Fuse 1 (C0580-2) supplies an ignition feed to the alarm ECU
(C0061-10) on a white/green wire. The alarm ECU (C0057-11) is earthed on a
black wire.
When an ignition feed is received by the alarm ECU, it sends a coded signal
(C0061-14) to the ECM (C0658-34) on a light green/slate wire. If the signal
does not match the one expected by the ECM, the ECM will immobilise the
engine. 
						

							DESCRIPTION AND OPERATION
4.6
DEFENDER 1999 MY
When the ignition switch is turned to the crank position, current flows across
the switch (C0090-1) to the starter relay (C0151-4) on a white/red wire. With
the alarm ECU in the armed state, it also provides a feed (C0057-10) to the
starter relay (C0151-6) on the black/orange wire. As the potential difference
across the relay is 0 volts, the relay is not energized. When the alarm is
de-activated, the alarm ECU (C0057-10) withdraws the feed on the
black/orange wire, and provides an earth path (C0057-11) on a black wire. The
starter relay will now be energized, enabling the engine to be cranked.
The alarm ECU (C0057-9) also controls the flashing sequence of the engine
immobilisation warning lamp (C0233-5) by providing it with a pulsed signal on
an orange wire. The lamp (C0230-8) is earthed on a black wire.
In addition to features directly controlled by the alarm ECU, a passive coil is
fitted around the ignition barrel. This is a user friendly way of re-mobilizing the
engine. The passive coil (C0049-1) receives a pulsed voltage signal from the
alarm ECU (C0057-7) on an orange/green wire. The passive coil (C0049-2)
also receives a constant feed from the alarm ECU (C0057-12) on an
orange/purple wire.
The passive coil is only energized when the ignition switch is in position II and
the engine is in an immobilised state. The coil creates a magnetic field that
excites a coil in the RF handset. This causes the handset to transmit a code to
the alarm ECU to re-mobilise the engine.
The alarm ECU can be interrogated via the diagnostic socket using TestBook.
The socket (C0040-8) is connected to the alarm ECU (C0061-17) by an
orange/light green wire.