86
ELECTRICAL
VEHICLE IMMOBILISATION AND ALARM SYSTEM
The handset battery should last for approximately
three years dependent upon use. The following
symptoms will be noticed when the battery requires
replacement:
A sophisticated engine immobilisation and anti-theft
alarm system is offered on the Land Rover Defender
300
Tdi vehicle range, which incorporates the
following features:
1. The handset will only work every other operation
while disarming.
Perimeter protection
2. The direction indicator lamps will not flash when
the alarm is disarmed.
This part of the alarm system protects side doors,
bonnet and rear door against unauthorised entry -
alarm sounding if any one of these apertures is
opened without alarm first being disarmed.
For battery replacement procedure, see Handset
Battery.
Passive coil
Interior protection
The passive coil is fitted on the starter switch and
activates a receiving coil in the handset, causing it to
automatically transmit a remobilisation signal to the
ECU.
Also known as volumetric protection, this part of the
system protects space inside the vehicle. Once
armed, the alarm will sound if a door is opened, or if
movement is detected inside the vehicle.
Aerial
Engine immobilisation
The aerial is integral within the alarm system harness
and supplies the ECU with the signal received from
handset.
The engine is immobilised electronically whenever the
alarm system is armed. Even if the alarm has not
been armed, engine immobilisation will occur
automatically thirty seconds after the driver’s door is
opened, or five minutes after the starter switch is
turned to position ’0’.
Immobilisation spider
The immobilisation spider provides an interface
between ECU and immobilised areas of the vehicle.
This is installed in a sealed (safe) box inside the
vehicle battery box.
ALARM SYSTEM COMPONENTS
Electronic control unit (ECU)
Digital diesel shut-off valve - 97 MY
When fitted, the digital diesel shut-off valve
immobilises the fuel injection pump by preventing
power reaching the fuel shut-off solenoid, See
Immobilisation and alarm system circuit diagram -
with DDS .
The ECU is the alarm system brain and controls all
vehicle immobilisation and alarm functions. It
responds to the inputs received, by supplying suitable
outputs to indicate status of the alarm system or
activating relevant warning devices. unit is located
under fascia behind instrument binnacle.
Handset and key
The handset is the primary source of control for the
alarm system i.e. it arms and disarms the alarm
components. The key can be used to override engine
immoblisation if the handset is lost or fails to operate,
see Engine immobilisation override.
2
DESCRIPTION AND OPERATION
| Categories | Land Rover, Land Rover Defender |
|---|---|
| Tags | Land Rover |
| Model Year | 1996 |
| Download File |
|
| Document Type | Workshop Manual |
| Language | English |
| Product Name | Defender 300 Tdi |
| Product Brand | Land Rover |
| Document File Type | |
| Publisher | landrover.com |
| Wikipedia's Page | http://en.wikipedia.org/wiki/Land_Rover |
| Copyright | Attribution Non-commercial |
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