Antitheft and Alarm Systems: Description and Operation

SECURITY/CENTRAL LOCKING

CIRCUIT OPERATION

Basic Overview - Central Door Locking
All new Range Rover models feature Central Door Locking.

All four doors and the tailgate can be locked and unlocked through operation of the central locking system, which can be operated by:
- Pressing down, or lifting up, either of the front door sill buttons.
- Turning the key clockwise (to lock), or turning the key anti-clockwise (to unlock), with the key in the drivers door lock.
- Pressing the "lock" button, or pressing the "unlock" button, on the remote handset.

The new Range Rover is also equipped with a "Superlocking" feature. When the vehicle is "Superlocked", it is impossible to unlock any of the doors from inside the vehicle by lifting any of the sill buttons.

Basic Overview - Alarm
All new Range Rovers are equipped with a sophisticated integrated security system.

The alarm system offers the following forms of protection:
- Perimetric protection against unauthorised opening of any of the hinged "slam" panels.
- Engine crank inhibit against unauthorised engine crank.
- Electronic engine immobilisation against unauthorised engine start.
- Volumetric protection against intrusion into the passenger compartment.

Basic Overview - Lazy Locking
An additional feature of the new Range Rover's security system is Lazy Locking.

Lazy Locking enables the driver to close any open glass panel (window or sunroof) from outside the car using either the key or the remote handset.

Lazy Locking can be carried out either when locking or super locking the vehicle, or when the vehicle is already in a locked state.

N.B. Activation of a lazy locking sequence will be dependent on market requirements.

General
The vehicle locking and security system comprises the following components:
- "C" type latches on the passenger doors incorporating central door locking, superlocking and slam locking facilities.
- An external key barrel on the driver's door, allowing central door locking, superlocking and unlocking, with mechanical override via key (excluding superlocking) in the event of a power failure.
- Separately controlled central door locking actuators on tailgate and fuel filler flap.
- Ultrasonic movement detector, located over the LH "B" post.
- Passive Immobilisation Coil (Z270) (Not on all vehicles).
- Under bonnet mounted alarm klaxon (Not on all vehicles).
- Battery Backed Up Alarm Sounder (Z272) (Not on all vehicles).
- Radio Frequency remote key allowing locking, superlocking, unlocking and lazy locking.
- Inertia switch allowing unlocking in the event of a crash.
- Security LED to indicate the "alarm active" state.

Remote Handset Operation
The handset has two buttons, lock/superlock and unlock. The operation is as follows:
- Lock - single press of lock button.
- Superlock - double press of lock button (within 1 second).
- Unlock - single press of unlock button from either locked or superlocked.
- Lazy lock - press and hold lock button for more than 1 second.
- (NB Hold on second press if superlock required as well.)
- Lazy Seats - press unlock button for more than 1 second.
- (NB This will unlock as well.)

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

- 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.

- 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.

- 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.

- 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.

- 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.

- 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.

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

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):
- Turn Ignition On (Pos. II).
- Turn Ignition Off.
- Disconnect within 17 seconds.

To silence if triggered:
- Connect.
- Disarm Alarm.
- 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.

Passive Immobilisation
The following conditions will passively immobilise the vehicle:
- 30 seconds after ignition has been turned off and the driver s door has been opened.
- 30 seconds after ignition has been turned off, the key removed, and the driver's door has been opened.
- 10 minutes after ignition has been turned off and the key removed (without opening the driver s door).
- The handset becomes desynchronised (or with an improperly functioning handset).

The vehicle can be mobilised by any of the following methods:
- Turn the ignition on (The handset must be functioning properly and within close proximity to the key!)
- Press unlock button on the handset
- 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:
- The handset's batteries have been removed.
- 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.