Land Rover Defender 300 Tdi Electrical Library Rover Manual

DESCRIPTION AND OPERATION
DEFENDER 97 MY4.1
ENGINE IMMOBILISATION AND ALARM SYSTEM (IF FITTED)
DESCRIPTION
Although a key is used in the normal way to lock and unlock the vehicle, this
will not fully arm the engine immobilisation/alarm system. The system is fully
armed with an RF handset, which transmits a rolling code. This code is
received by the alarm ECU. If a door is opened without the alarm ECU
receiving the correct signal from the handset, the alarm will sound.
The alarm ECU also informs the...

DESCRIPTION AND OPERATION
4.2
DEFENDER 97 MY
9.Finally, OPEN and CLOSE the drivers door. If the code has been entered
correctly, the anti-theft indicator lamp will extinguish and the engine can
be started.
NOTE: If the vehicle has been previously armed, and the handset is
inoperative, the alarm will sound throughout the EKA entering
process.
OPERATION
Feed from the positive battery terminal is connected to the engine compartment
fuse box (C632-1) by a brown wire. Current flows through fusible link 1 and...

DESCRIPTION AND OPERATION
DEFENDER 97 MY4.3
The same principle is true of the LH door switch and the bonnet switch. The LH
door switch (C033-1) is connected to the alarm ECU (C061-16) by a
purple/blue wire, and the bonnet switch (C007-2) is connected to the alarm
ECU (C061-9) by a orange/blue wire. The bonnet switch is earthed (C007-1) on
a black wire. Both interact with the BBUS in exactly the same way as the RH
door switch.
In addition to being supplied with a constant battery feed (C666-2), the BBUS...

DESCRIPTION AND OPERATION
4.4
DEFENDER 97 MY
IMMOBILISATION
With the ignition switch in position II, power flows across the switch (C094-1)
and supplies a feed to fuse 20 of the passenger compartment fuse box
(C580-39) on a white wire, and to the engine immobilisation ECU (C868-8 &
C863-5) on a black wire.
The immobilisation ECU is provided with a permanent earth (C863-1) on a
black wire.
Fuse 20 of the passenger compartment fuse box (C580-40) is connected to the
alarm ECU (C061-10) by a green wire, the...

DESCRIPTION AND OPERATION
DEFENDER 97 MY4.5
The immobilisation ECU also controls the fuel cut-off solenoid (C198-1), which
is connected (C863-4) by a black wire. The immobilisation ECU fails to provide
the solenoid a feed if the vehicle has been immobilised.
In addition to the features directly controlled by the immobilisation ECU, a
passive coil is fitted around the ignition barrel. This is a user friendly way of
re-mobilising the engine. The passive coil (C663-1) receives a power supply
from the alarm...

DESCRIPTION AND OPERATION
4.6
DEFENDER 97 MY
CHARGING AND STARTING - DIESEL
DESCRIPTION
The charging system consists of an alternator containing a rectifier pack and
regulator to maintain a constant direct current (dc) voltage in the system. The
alternator is belt driven from the crankshaft and cooled by a fan mounted
behind the pulley. The alternator has a fixed coil wound stator in which a field
coil rotor rotates. Slip rings conduct current to and from the field coils via 2
carbon brushes. The...

DESCRIPTION AND OPERATION
DEFENDER 97 MY4.7
When the alternator outputs a voltage equal to that supplied by the battery, the
warning lamp is extinguished as the potential difference across the lamp is 0
volts. The diode between the alternator and warning lamp prevents reverse
flow.
The regulator functions as an electronic control switch on the earth side of the
field coils. The regulator rapidly switches the earth circuit off and on to control
the generated voltage and current to safe limits.
If the...

DESCRIPTION AND OPERATION
4.8
DEFENDER 97 MY
Glow Plugs
Glowplugs are fitted to the TDi engine to assist starting. A constant battery feed
is supplied by fusible link 3 (C907-3) to the glow plug timer (C189-5) on a
brown wire. When the ignition switch is turned to position II, a second feed is
supplied to the glow plug timer (C189-3). This triggers a feed (C189-6) to the
glow plugs.
With the ignition switch in position II, the glow plug warning lamp (C230-4) is
provided a feed via fuse 17 (C580-33) of...

DESCRIPTION AND OPERATION
DEFENDER 97 MY4.9
CHARGING AND STARTING - V8
DESCRIPTION
The charging system consists of an alternator containing a rectifier pack and
regulator to maintain a constant direct current (dc) voltage in the system. The
alternator is belt driven from the crankshaft and cooled by a fan mounted
behind the pulley. The alternator has a fixed coil wound stator in which a field
coil rotor rotates. Slip rings conduct current to and from the field coils via 2
carbon brushes. The regulator...

DESCRIPTION AND OPERATION
4.10
DEFENDER 97 MY
When the alternator outputs a voltage equal to that supplied by the battery, the
warning lamp is extinguished as the potential difference across the lamp is 0
volts. The diode between the alternator and warning lamp prevents reverse
flow.
The regulator functions as an electronic control switch on the earth side of the
field coils. The regulator rapidly switches the earth circuit off and on to control
the generated voltage and current to safe limits.
If the...