Range Rover 2. Electrical Manual - part 225

SECURITY/CENTRAL LOCKING

S3

CIRCUIT OPERATION

2

Remote Handset Operation

The handset has two buttons, lock/superlock and
unlock. The operation is as follows:

D

Lock – single press of lock button.

D

Superlock – double press of lock button (within 
1 second).

D

Unlock – single press of unlock button from
either locked or superlocked.

D

Lazy lock – press and hold lock button for more
than 1 second.

D

(NB Hold on second press if superlock required
as well.)

D

Lazy Seats – press unlock button for more than
1 second.

D

(NB This will unlock as well.)

Locking operation

There are six different ways to lock a new Range
Rover. These are:

D

Sill Locking

Depressing either of the front door sill buttons while
both front doors are closed will result in all the doors
and the tailgate locking, and the vehicle entering a
sill locked state.

In this state the alarm remains inactive (provides no
protection), with no LED flash.

Sill locking can be achieved independently of key–in
and ignition switch status.

D

Slam Locking:

Depressing either of the front door sill buttons with
either front door open, will result in all the doors and
the tailgate locking and the vehicle entering a slam
locked state.

Following a slam locking operation, the alarm will
enter the perimetric mode, engine crank will be
disabled and electronic engine immobilisation will be
activated.

Attempting to slam lock the vehicle with either the
key in the ignition, or the ignition on, will cause
unlocking of all the doors.

D

Key Locking

A single turn of the key towards the front of the
vehicle will result in all the doors and tailgate locking.

The alarm will enter the perimetric mode, engine
crank will be disabled and electronic engine
immobilisation will be activated.

D

Key Superlocking

A double turn of the key in a clockwise direction (i.e.
towards the front of the vehicle) within 2 seconds,
provided the doors, tailgate and bonnet are closed,
will result in all the doors being superlocked.

The alarm will enter the perimetric mode, engine
crank will be disabled and electronic engine
immobilisation will be activated.

D

Remote Locking

A single press of the lock button on the remote
handset will result in all the doors and the tailgate
locking.

The alarm will enter the perimetric mode, engine
crank will be disabled and electronic engine
immobilisation will be activated.

D

Remote Superlocking

A double press of the lock button on the remote
handset within 2 seconds, provided the doors,
tailgate and bonnet are closed, will result in all the
doors being superlocked (subject to ultrasonic look
around – see Ultrasonic Sensor).

Providing all the windows are closed, the perimetric
and volumetric alarm will be set. If all the windows
are not closed, then only the perimetric alarm will be
set.

Engine crank will be disabled and electronic engine
immobilisation will be activated.

SECURITY/CENTRAL LOCKING

S3

CIRCUIT OPERATION

3

Lazy Locking

Lazy locking can be carried out when either locking
or superlocking, or when the vehicle is already in a
locked state, by either holding the key turned to the
lock position or by holding the remote handset lock
button pressed for more than one second.

This will cause all the open windows to start closing
simultaneously. Closure of the windows will be
followed by closure of the sunroof.

Dependent upon market requirements, lazy locking
will either operate in one–shot mode, or in dead
man’s handle mode.

D

In one–shot mode, the windows and sunroof will
continue to close even after the key has been
released from the lock position, or the lock
button on the remote handset has been
released.

D

In dead man’s handle mode, closure of the
windows and sunroof will only continue for as
long as the key is held to the lock position, or the
lock button is pressed on the remote handset. In
this case, failure of any of the apertures to be
fully closed upon release of the key/button will
result in a mislock.

Mislock

A mislock condition is indicated by either two short
“beeps” from the alarm sounder, or by three short
flashes of the courtesy lights, depending on the
market legislation.

Partial Arming Of The Perimetric Alarm

If the perimetric alarm is armed with one (or more) of
the doors, or the tailgate, or the bonnet open, then
the remaining panels are all protected by the alarm.
If any of the open panels are subsequently closed,
then they too will be protected by the alarm.

Security LED

The security LED has two functions:

D

Firstly for the initial ten seconds after a lock
request, it provides visual confirmation of the
lock status.

D

Secondly, after this confirmation period, it acts as
a deterrent to any theft attempt, (flashing at a
slower rate).

Volumetric Protection

Volumetric protection, (protection of the vehicle’s
interior), is provided by an Ultrasonic Sensor and
an Ultrasonic detector.

If the vehicle has been successfully superlocked with
the key, then provided all the windows are closed, a
single press on the remote transmitter lock button
will activate the ultrasonics. There is a 5 second
settling period before movement can be detected.

SECURITY/CENTRAL LOCKING

S3

CIRCUIT OPERATION

4

Audible/Visual Warnings

When an intrusion is detected, the Alarm Sounder
(Z171) will sound and visual indicators will flash. The
output from the sounder is either pulsed or a
continuous tone, depending on market legislation. If
the output is pulsed, then its status will be
synchronised with that of the visual indicators.

The lamps used for external visual indication are
dependent upon market legislation, but will be either
Hazards, or Side and Tail, or Dip and Tail.

Two different types of Alarm Sounders are available:

1. Normal Alarm Klaxon (Alarm Sounder (Z171))

2. Battery Backed Up Alarm Sounder (Z272)

The Battery Backed Up Alarm Sounder (Z272) is an
alarm sounder which contains its own internal
battery. When the ignition is on, the internal battery
is charged via an ignition feed. If either the connector
is removed or the wires to it are cut, then the
sounder will sound for 4.5 minutes.

To disconnect the Battery Backed Up Alarm Sounder
(Z272):

D

Turn Ignition On (Pos. II).

D

Turn Ignition Off.

D

Disconnect within 17 seconds.

To silence if triggered:

D

Connect.

D

Disarm Alarm.

D

Turn Ignition On (Pos. II).

Alarm Triggering

The perimetric alarm will be triggered by any of the
doors opening, the tailgate opening, the bonnet
opening, the ignition key being inserted, the ignition
being turned on, or the inertia switch being tripped.

The volumetric alarm will be triggered by any
movement within the passenger compartment.

The alarm will be triggered a maximum of three
times during any set/unset period. Any further
triggers after this will be ignored.

ENGINE IMMOBILISATION FUNCTION

The engine will be immobilised whenever the alarm
is armed or the alarm enters the Passive
Immobilisation mode (regardless of whether or not
the theft alarm is armed). There are two methods of
Engine Immobilisation featured:

1. Engine Crank Disable

2. Electronic Engine Immobilisation

The electronic engine immobilisation is controlled
jointly by the engine management system’s
Electronic Control Module and the BeCM.

If a crank signal is detected when the engine is
immobilised, the “Engine Immobilised” message will
be transmitted to the instrument pack, and it will not
be possible to start the engine.

Engine Immobilisation (Petrol)

The BeCM mobilises the engine by transmitting an
engine mobilise code to the ECM. The code is not
sent when the engine is immobilised.

Engine Immobilisation (Diesel)

The electronic engine immobilisation feature fitted to
the diesel engine derivatives is different to the
system fitted to the petrol versions.

The BeCM mobilises the engine by holding the
engine mobilise output high. The output will be low
when the engine is immobilised.

SECURITY/CENTRAL LOCKING

S3

CIRCUIT OPERATION

5

Passive Immobilisation

The following conditions will passively immobilise the
vehicle:

D

30 seconds after ignition has been turned off and
the driver’s door has been opened.

D

30 seconds after ignition has been turned off, the
key removed, and the driver’s door has been
opened.

D

10 minutes after ignition has been turned off and
the key removed (without opening the driver’s
door).

D

The handset becomes desynchronised (or with
an improperly functioning handset).

The vehicle can be mobilised by any of the following
methods:

D

Turn the ignition on (The handset must be func-
tioning properly and within close proximity to the
key!)

D

Press unlock button on the handset

D

Enter EKA code

NOTE: The vehicle will remain immobilised by
attempting to turn the ignition on with the handset
detached from the key ring (or with an improperly
functioning handset).

If the handset becomes desynchronised (or is
functioning improperly), the engine will be passively
immobilised. If an attempt is made to start the
engine, the message “Engine Disabled, Press
Remote” will be displayed on the message centre. To
mobilise the engine the EKA code must be entered
and the handset (when functioning properly)
resynchronised.

Passive Immobilisation Coil (Z270)

A magnetic field is generated by the passive
Immobilisation Coil (Z270) contained in the steering
column. This field excites a receiving coil in the
handset causing it to transmit a mobilisation signal to
the BeCM. If the BeCM does not receive this signal
from the handset, the vehicle will remain
immobilised.

Handset Transmitter Resynchronisation

The Theft Alarm Unit (Z163) will remain
synchronised with the handset unless:

D

The handset’s batteries have been removed.

D

The vehicle’s battery has been disconnected.

NOTE: All handsets must be resynchronised when
the vehicle’s battery has been disconnected.

A handset may be resynchronised by performing a
key lock, or unlock, on either front door within 30
seconds of performing a remote lock, superlock, or
unlock function. The BeCM uses the change of state
of the CDL Switch to initiate resynchronisation.

Emergency Key Access (EKA)

EKA is used to disarm the theft alarm and mobilise
the vehicle in the event of a handset failure. This is
possible through a series of locks and unlocks with
the key in the driver’s door lock cylinder. With the
vehicle locked and the alarm armed, turn the key the
required number of times according to the following
sequence:

1. To enter the first digit, turn the key the required

number of times to the unlock position.

2. To enter the second digit, turn the key the

required number of times to the lock position.

3. To enter the third digit, turn the key the required

number of times to the unlock position.

4. To enter the fourth digit, turn the key the required

number of times to the lock position.

5. Turn the key to the unlock position to unlock the

doors, disarm the alarm, and mobilise the
vehicle.

NOTE: The key must be fully turned to the rest and
lock/unlock position each time.

After 5 wrong attempts, you must wait 10 minutes.