Land Rover Defender 2002 Electrical Library Rover Manual

DESCRIPTION AND OPERATION
4.8DEFENDER 02MY
Transponder Coil
The transponder coil (C1318 on LHD, C0049 on RHD) is provided a battery value feed by 
the anti-theft alarm ECU (C1980 on LHD, C0057 on RHD) on an OP wire. The anti-theft 
alarm ECU (C1980 on LHD, C0057 on RHD) also provides the transponder coil (C1318 on 
LHD, C0049 on RHD) a pulsed feed on a OG wire. The transponder coil creates a magnetic 
field that excites a coil within the RF handset. This causes the RF handset to transmit a...

DESCRIPTION AND OPERATION
DEFENDER 02MY 4.9
Immobilisation Warning Lamp
Fuse 30 of the passenger compartment fuse box (C0595) provides a constant battery feed 
to the immobilisation warning lamp (C1061) on a PN wire. The anti-theft alarm ECU (C1980 
on LHD, C0057 on RHD) also provides a feed to the warning lamp (C0233) on an O wire. 
As the potential difference across the bulb is 0 V, the lamp remains extinguished. To 
illuminate the lamp, the anti-theft alarm ECU withdraws the feed on the O wire and...

DESCRIPTION AND OPERATION
4.10DEFENDER 02MY
Immobilisation ECU – 300 Tdi Only
The immobilisation ECU (C0059) receives an ignition feed via fuse 12 of the passenger 
compartment fuse box (C0580) on a WG then B wire, and is earthed on a B wire.
When the ignition switch is turned to the ignition position, the anti-theft alarm ECU (C1979 
on LHD, C0061 on RHD) provides a coded digital signal to the immobilisation ECU (C0059) 
on a LGS then B wire. When the ignition switch is turned to the crank position, the...

DESCRIPTION AND OPERATION
DEFENDER 02MY 4.11
WINDOWS
DESCRIPTION
Introduction
Defender is now fitted with electric front windows, which operate when the ignition switch is 
turned to the ignition position. The window lift switches are non-latching, and are located on 
the fascia console.
OPERATION
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fusible link 1 and fusible link 
5 of the passenger compartment fuse box (C0632) on an N wire. Fusible link 1 is connected 
in...

DESCRIPTION AND OPERATION
4.12DEFENDER 02MY
LH Window
The energised ignition relay (C0218) provides a feed to fuse 35 of the passenger 
compartment fuse box (C0595) on an NS wire. Fuse 35 (C0595) is connected to the LH 
window switch (C0321) by an RG wire.
Up
When the window switch is moved to the Up position, current flows across the switch 
(C0321) to the LH window lift motor (C0326) on an R wire. The window lift motor (C0326) is 
provided an earth path via the window switch (C0321) on a U then B wire....

DESCRIPTION AND OPERATION
DEFENDER 02MY 4.13
HEATED SEATS
DESCRIPTION
Introduction
Defender is now fitted with heated front seats, which operate when the ignition switch is 
turned to the ignition position. The seat heat switches are latching switches, and are located 
on the fascia console. Each switch also contains a tell-tale LED.
Both seat heater elements contain a thermostatically controlled switch. When the element 
temperature reaches 37 ± 3 °C (98 ± 3 °F), the thermostat cuts the supply to the...

DESCRIPTION AND OPERATION
4.14DEFENDER 02MY
DIAGNOSTIC SOCKET
DESCRIPTION
Introduction
The diagnostic socket is located below the centre of the fascia. It allows communication to 
and from off board diagnostic tools, enabling detailed fault diagnosis checks to be carried 
out. The socket is compliant with SAE directive J1962 standard, and allows attachment of 
TestBook, T4 or any other diagnostic software and tools.
OPERATION
Power Distribution
Feed from the positive battery terminal (C0192) is supplied...

DESCRIPTION AND OPERATION
DEFENDER 02MY 4.15
STARTING AND CHARGING – 300 Tdi
DESCRIPTION
Starting
The starting system on the vehicle comprises a 12 volt starter motor which drives the engine 
to start the combustion process. The starter converts electrical energy into mechanical 
power. The vehicle electrical system must be capable of supplying sufficient power to enable 
the engine to be cranked.
Charging
The charging system comprises a battery and an alternator. The battery must be of a 
sufficient...

DESCRIPTION AND OPERATION
4.16DEFENDER 02MY
Starting
Glow Plug ECU
When the glow plug ECU (C0190) receives an ignition feed via fuse 14 of the passenger 
compartment fuse box (C0580), it provides a feed to the following:

Glow plug number 4 (C1039) on a YB wire

Glow plug number 3 (C0478) on a YB wire

Glow plug number 2 (C0477) on a YB wire

Glow plug number 1 (C0476) on a YB wire

The glow plug warning lamp (C0233) on a BY wire.
The glow plugs are connected in parallel, and are all earthed via their...

DESCRIPTION AND OPERATION
DEFENDER 02MY 4.17
The energised starter relay (C0151) provides a feed to the immobilisation ECU (C0059) on 
an NR then B wire. If the vehicle has been successfully re-mobilised, the immobilisation ECU 
(C0059) provides a feed to the starter motor solenoid (C0179) on a B wire, and the glow plug 
ECU (C0190) on a B then NR wire. When the glow plug ECU receives the feed from the 
immobilisation ECU, it immediately cuts the feed to the glow plugs and the glow plug warning 
lamp....