Discovery II
ALARM SYSTEM AND HORN
86-4-18 DESCRIPTION AND OPERATION
Internal locking
Internal locking allows the doors to be locked / unlocked from a central position using switches on the instrument
panel. The internal unlock switch will not operate if the vehicle is super locked.
Electric fuel flap release
Up to 03 model year shown
The fuel flap is opened by pressing the button on the fascia on vehicles up to 03 model year or on the instrument pack
binacle on vehicles from 03 model year. This works only if the anti-theft system is not armed and the ignition is off.
In some configurations, it may also be necessary to remove the key from the ignition switch.
Configurable system functions
The following alarm system features are configurable using TestBook.
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Perimetric alarm.
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Volumetric alarm.
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Super locking.
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Partial arming.
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Mislock.
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Passive immobilisation.
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Passive remobilisation.
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Emergency key access.
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Single point entry.
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Speed related locking.
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Acclimatisation related locking.
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Visual warnings.
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Audible warning.
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Theft deterrent led.
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Transit mode.
Perimetric alarm
The perimetric alarm is used by the BCU to detect unauthorised opening of a door or hinged panel. Switches
incorporated into the door latch assemblies and the bonnet determine the state of the panels.
There are two perimetric alarm configurations:
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Alarm not active.
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Alarm active.
Arming: To arm the perimetric alarm, press the lock button on the handset or lock the vehicle using the key in the
driver's door. Once the alarm has been set, the BCU monitors the state of the doors and the bonnet.
In order to arm the perimetric alarm the following conditions must be met:
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Drivers door closed.
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Key not inserted in ignition switch.
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Fuel cut-off switch not tripped.