Workshop Manuals Factory service & repair Land Rover
01 Discovery Workshop Manual - 2nd Edition02 01 - INTRODUCTION03 04 - GENERAL SPECIFICATION DATA04 05 - ENGINE TUNING DATA05 07 - GENERAL FITTING REMINDERS06 09 - LUBRICANTS, FLUIDS AND CAPACITIES07 10 - MAINTENANCE08 12 - ENGINE - Tdi09 10 11 12 12 - ENGINE - V8i13 12 - ENGINE - 4.0 V814 12 - ENGINE - Mpi15 16 17 18 17 - EMISSION CONTROL19 19 - FUEL SYSTEM - Tdi20 19 - FUEL SYSTEM - MFI21 19 - FUEL SYSTEM - SFI22 19 - FUEL SYSTEM - Mpi23 19 - FUEL SYSTEM - Cruise Control24 26 - COOLING SYSTEM - Tdi25 26 - COOLING SYSTEM - V8i26 26 - COOLING SYSTEM - Mpi27 28 30 - MANIFOLD AND EXHAUST SYSTEM29 33 - CLUTCH30 37 - MANUAL GEARBOX - R38031 41 - TRANSFER GEARBOX32 44 - AUTOMATIC GEARBOX - ZF33 34 35 47 - PROPELLER SHAFTS36 51 - REAR AXLE AND FINAL DRIVE37 38 54 - FRONT AXLE AND FINAL DRIVE39 40 41 57 - STEERING42 43 44 60 - FRONT SUSPENSION45 64 - REAR SUSPENSION46 70 - BRAKES47 74 - WHEELS AND TYRES48 75 - SUPPLEMENTARY RESTRAINT SYSTEM49 76 - CHASSIS AND BODY50 51 80 - HEATING AND VENTILATION52 82 - AIR CONDITIONING53 84 - WIPERS AND WASHERS54 86 - ELECTRICAL
Land Rover 300Tdi Discovery54 · 86 - ELECTRICAL
54 · Electrical

ANTI-THEFT ALARM BUILT-IN TEST (96 MODELS) (86 - ELECTRICAL)

Make
Land Rover
Model
Discovery 300Tdi Discovery
Section
DESCRIPTION AND OPERATION › ANTI-THEFT ALARM BUILT-IN TEST (96 MODELS)
86 - ELECTRICALANTI-THEFT ALARM BUILT-IN TEST (96 MODELS)
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86

ELECTRICAL

8

DESCRIPTION AND OPERATION

DETECTION COMPONENTS

Switches

Perimetric protection for the vehicle is provided by
ECU inputs connected to the following:

Key switches (including starter)
Sill buttons
Bonnet switch
Door switches

Ultrasonic sensor

The ultrasonic sensor is located on the interior light
switch panel and triggers the alarm if movement is
detected.

WARNING INDICATORS

Battery backed-up sounder

The battery backed-up sounder is located in the
engine compartment and provides an audible warning
whenever the alarm is triggered.

NOTE: Disconnecting the vehicle battery
will result in the alarm sounding if the
correct procedure has not been followed.

See Repair, Battery.

Engine immobilisation warning light (EIWL)

The engine immobilisation warning light is located in
the instrument pack and provides a visual indication
that the engine is immobilised.

Anti-theft alarm indicator light

The anti-theft alarm indicator light is located in the
instrument pack and provides a visual indication of the
alarm status.

Inertia switch and central door locking

As a safety feature, the alarm system is designed to
recognise the inertia switch and via the ECU, unlock
the doors in the event of a collision.

NOTE: This feature only applies when the
starter switch is in the on position.

ANTI-THEFT ALARM OPERATION (96 MODELS)

Full arming and immobilisation

Locking the vehicle using the handset immobilises the
engine and initializes both volumetric and perimetric
protection, providing:

1. After a lock signal has been received, a period of

15 seconds has elapsed during which no
movement is detected inside the vehicle;

2. No door or bonnet is open.

NOTE: If either of the above conditions are
not satisfied, the alarm will only be
partially armed. This is a mislock condition

which will be made apparent by a delay of 10
seconds before the anti-theft alarm indicator
begins to flash.

Disarming the alarm

NOTE: ALWAYS disarm the alarm using
the handset.

Unlocking with the key will not disarm the alarm or
mobilise the vehicle. If the handset fails to unlock the
vehicle

See Repair, Handset.

Partial arming and immobilisation

The alarm will be partially armed and the engine
immobilised if the vehicle is locked with the handset or
key, if:

1. After a lock signal has been received, a period of

15 seconds has elapsed during which movement
is detected inside the vehicle;

2. A door or bonnet is open.

NOTE: This is a mislock condition which
will be made apparent by a delay of 10
seconds before the anti-theft alarm

indicator begins to flash. Subsequent closure of
the offending aperture will cause the alarm to
attempt full arming as previously described.

Immobilisation

The vehicle will be automatically immobilised
whenever any of the following conditions occur:

1. The vehicle is locked using the handset.
2. The vehicle is locked using the key.
3. Thirty seconds after the starter switch has been

turned off AND the driver’s door opened.

4. Five minutes after the starter switch is turned off

or the alarm disarmed.

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