Workshop Manuals Factory service & repair Land Rover
01 Introduction02 General information03 General data04 Identification numbers05 Torque wrench settings06 Lifting and towing07 Capacities, fluids and lubricants08 Maintenance09 Engine - Td510 Engine - V811 Emission control - Td512 Emission control - V813 Engine management system - Td514 Engine management system - V815 Fuel delivery system - Td516 Fuel delivery system - V817 Cooling system - Td518 Cooling system - V819 Manifolds and exhaust systems - Td520 Manifolds and exhaust systems - V821 Clutch - Td522 Clutch - V823 Manual gearbox - R38024 Transfer box - LT230SE25 Automatic gearbox - ZF4HP22/2426 Propeller shafts27 Rear axle28 Front axle29 Steering30 Front suspension31 Rear suspension32 Brakes33 Restraint systems34 Doors35 Exterior fittings36 Interior trim components37 Screens38 Seats39 Sunroof40 Chassis and body dimensions41 Panel repairs42 Body sealing materials43 Corrosion prevention and sealing44 Painting45 Heating and ventilation46 Air conditioning47 Wipers and washers48 Charging and starting49 Lighting50 Body control unit51 Alarm system and horn52 Windows53 In car entertainment54 Harnesses55 Driving aids56 Navigation system57 Instruments
Land Rover Discovery II (UK)51 · Alarm system and horn
51 · Electrical

Alarm system and horn (Operation): Description and operation

Make
Land Rover
Model
Discovery II (UK)
Section
Description and operation › Operation
Alarm system and hornOperation

Operation

Standard system functions

All vehicles have the following functions as standard. l Locking. l Unlocking. l Fuel cut off switch unlocking. l Internal locking. l Electric fuel flap release.

Locking The doors are locked by pressing the lock button on the handset or by locking the vehicle from the driver's door with the key.

In order to lock the vehicle, the following conditions must be met: l The driver's door is closed. l The ignition is off. l The fuel cut off switch is not tripped. l The bonnet is closed. l The vehicle is not super locked.

Depending on system configuration a mislock occurs if these conditions are not met. The doors may lock (depending on condition not met) and the system may not fully arm, depending on configuration of the system. If a mislock occurs an audible warning is emitted and the vehicle becomes partially armed.

Unlocking The doors are unlocked by pressing the unlock button on the handset or by unlocking the vehicle from the driver's door with the key. This may unlock only the driver's door or it may unlock all doors depending on system configuration.

Fuel cut off switch unlocking

Standard system functions – Fuel cut off switch unlocking

In the event that the vehicle experiences a force strong enough to actuate the switch, all the doors on the vehicle immediately unlock. The following conditions must be met for this to occur: l The security system is not armed. l The ignition is on.

This same action causes the fuel pump to shut off and disables the Engine Control Module (ECM). In some markets, this action may also cause the direction indicators lights to flash.

Parts & tools for this job For Land Rover Discovery

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