1999 LAND ROVER DEFENDER key

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DESCRIPTION AND OPERATION SECURITY AND CENTRAL DOOR LOCKING
SYSTEM COMPONENTS - FROM 02MY
1.Engine immobilisation warning lamp
2.Security LED
3.Transponder coil
4.CDL actuators (tail door shown)
5.Immobilisation ECU (300Tdi models only)
6.Remote handset and key7.Door switches
8.Bonnet switch
9.Alarm sounder
10.Battery Backed Up Sounder (BBUS)
11.Anti-theft alarm ECU
12.Volumetric sensor
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DESCRIPTION AND OPERATION Perimetric Protection
Perimetric protection is the monitoring of each opening door or bonnet to unauthorised intrusion. The anti-theft
alarm ECU uses the door and bonnet switches described previously to determine when illegal intrusion has
occurred.
If a door/bonnet is left open when the alarm system is armed, the ECU will determine a mislock situation which is
indicated by non operation of the hazard warning lamps. If the drivers door is left open, the security LED in the
instrument pack will be illuminated for the 10 second confirmation period. If any other door or the bonnet is left
open the security LED will remain off for the 10 second confirmation period. After the confirmation period, the LED
will revert to the 1Hz deterrent flash.
If the door/bonnetis subsequently closed, the hazard warning lamps will flash to show that full perimetric protection
is now invoked. The security LED will also resume the 10 second confirmation flash.
If only the bonnet is left open, all doors will have perimetric protection and volumetric protection will also be set. If
a door is left open, the volumetric protection is suspended until that door is subsequently closed.
Volumetric Protection
The vehicle alarm system can be armed with or without volumetric protection activated. If volumetric protection is
required, the vehicle must be locked using the lock button on the remote handset. If volumetric protection is not
required, because a pet is to be left in the vehicle for instance, the vehicle must be locked using the vehicle key in
the drivers door lock.
When the vehicle is locked using the remote handset, the volumetric sensor will wait for a period of 15 seconds
before arming. This allows time for the air in the vehicle to settle and prevent incorrect activation of the alarm.
If volumetric protection is set and there is a disturbance in the vehicle, i.e., a window left open or a moving object
in the vehicle, within the 15 second period, the volumetric sensor will not activate. The sensor must detect no
disturbance for the full 15 second period before arming.
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DESCRIPTION AND OPERATION Remote Handset
The remote handset is a separate unit from the vehicle key and is used to arm and disarm the alarm system. The
handset comprises two buttons; lock and unlock. The handset contains a battery (CR3032) and a printed circuit
board containing the circuitry to generate the RF signals.
NOTE: In selected markets, the vehicle key, when used in the drivers door key barrel switch, will
not disarm the alarm system.
The remote handset RF code consists of two parts. One part is a fixed code that is unique to the handset and the
second part is a rolling code which changes in accordance with a predetermined pattern. The anti-theft alarm ECU
can store the codes of up to four different remote handsets at any one time.
If the remote handset battery falls below a predetermined level, the handset will transmit an additional RF signal
code to the anti-theft alarm ECU when either button is depressed. The security LED will display this as two rapid
flashes every 0.5 seconds to visually display the low handset battery condition. This will continue for the 10
second confirmation period or until the ignition is switched on.
Resynchronisation of Remote Handset
If either the remote handset battery or the vehicle battery is removed or disconnected, the rolling part the handset
code is lost and the handset(s) need to be resynchronised to the anti-theft alarm ECU. The resynchronisation
procedure is as follows:
Disconnect the vehicle battery.
Wait for 30 seconds for residual current to dissipate.
Reconnect the vehicle battery.
Carefully prise the remote handset apart and remove the battery. Avoid unnecessary handling of the battery.
With the battery removed, press either the lock or unlock button several times to remove residual current from
the circuitry.
Check the handset battery with a voltmeter. If the battery voltage is less than 2.7 volts, replace the battery.
Ensure that the battery contact surfaces are clean and replace the battery in the handset clip with the + symbol
uppermost. Put the two halves of the handset case back together.
DO NOT press any buttons.
With the handset within range of the vehicle, press the lock button four times in quick succession. The
anti-theft alarm ECU will respond by locking the vehicle.
Press the unlock button once to complete the resynchronisation procedure.
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DESCRIPTION AND OPERATION Passive Immobilisation
Passive immobilisation occurs when the key is removed from the ignition switch and the drivers door is opened,
after a period of 30 seconds the engine will become immobilised. If the ignition is turned off or the key is removed
from the ignition switch and drivers door is not opened, the engine will become immobilised after 5 minutes.
The passive immobilisation system operates in conjunction with the transponder coil located around the ignition
switch barrel. The transponder coil emits an electro magnetic waveform signal which excites the remote handset
into transmitting a remobilisation signal. When remobilisation is requested, the anti-theft alarm ECU transmits an
appropriate code to the ECM on Td5 models or the engine immobilisation ECU on 300Tdi models.
Active immobilisation
Active immobilisation is only invoked when the vehicle is locked using the remote handset. Active immobilisation
performs the same engine disable functionality as the passive immobilisation previously described, but includes
full CDL and activation of perimetric and volumetric alarm modes.
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DESCRIPTION AND OPERATION Emergency Key Access (EKA)
If the vehicle is in an immobilised condition and the remote handset is not available or inoperable, an EKA
procedure using the vehicle key is available to remobilise the engine systems. The EKA code is supplied with the
vehicle and is shown on the security card supplied with the owners handbook.
NOTE: This feature is only available in markets where full alarm functionality is specified.
The EKA code involves the input of a unique four digit code which is entered using the ignition switch and the
drivers door switch. Note that the alarm sounder will operate as soon as the drivers door is opened and will
continue until the sequence is successfully completed.
To enter the code (2, 3, 4, 5 for example) perform the following steps:
1.Remove the handset from the key ring and position the handset well away from the ignition switch when
entering the code.
2.Open the driver’s door and immediately insert the key in the ignition switch and turn the ignition switch to
position II. Hold this position until the alarm sounds, then switch the ignition off (position 0) and close the
driver’s door.
3.Enter the first digit of the code. Turn the ignition on (to position II) and then off twice. Open and close the
driver’s door to enter the first digit.
4.Enter the second digit. Turn the ignition on and then off, three times. Open and close the driver’s door to
enter the second digit.
5.Enter the third digit. Turn the ignition on and then off, four times. Open and close the driver’s door to enter
the third digit.
6.Enter the fourth digit. Turn the ignition on and then off, five times. Open and close the driver’s door to enter
the fourth digit. If the code has been entered correctly, the alarm LED in the instrument pack will extinguish
and the engine can be started after the last closure of the driver’s door.
If a digit is incorrectly entered, holding the ignition switch in the on position for more than 5 seconds will reset the
sequence. The code must then be re-entered from the beginning.
If the EKA code is correctly entered, the security LED will illuminate for 1 second, the immobilisation will be
disabled and the alarm sounder will cease to operate.
If the EKA code is incorrectly entered, the alarm sounder will sound twice and the correct code must be
re-entered, If the EKA code is incorrectly entered three times the system invokes a 30 minute lockout. This is
signalled by the LED flashing with a long illuminated period followed by a short extinguished period for the lockout
duration.
NOTE: Disabling the alarm and immobilisation system using the EKA procedure is only valid for
one ignition on/off cycle. When the ignition is switched off, the immobilisation system will be
activated after a period of 30 seconds. If the remote handset is still unavailable, the EKA
procedure will have to be repeated each time the vehicle is to be driven.
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DESCRIPTION AND OPERATION CENTRAL DOOR LOCKING (CDL) - FROM 02MY
The Central Door Locking (CDL) system is a new feature for 2002MY Defender.
NOTE: CDL operates all doors on Station Wagon and County Station Wagons. On all other
Defender 2002MY variants, CDL operates on the driver and front and rear passenger doors only.
General
CDL operates on all doors, including the tail door and is operated by pressing the appropriate button on the
remote handset, using the vehicle key in the drivers door lock or using the drivers door sill button.
The CDL system introduces electrically operated door latches which are controlled by the anti-theft alarm ECU,
located behind the instrument pack. The anti-theft ECU receives a permanent power supply from fuse 6 in the
passenger compartment fuse box. Each CDL latch motor is connected by two wires to the anti-theft ECU which
alternately supplies power and earth connections to drive each motor to the lock or unlock positions.
If the latch motors are continually operated in a short period of time, the anti-theft ECU will suspend all CDL latch
motor operation for 15 seconds to prevent the motors from overheating. Before suspension occurs the anti-theft
ECU ensures that all the doors are left in the unlocked condition.
If the vehicle is locked, and the key is in the ignition switch or the ignition is on and the anti-theft alarm ECU inertia
switch is tripped, all doors will be unlocked immediately and the hazard warning lamps will operate. To prevent
accidental relocking, all latch motors will be inhibited until the anti-theft ECU senses that the drivers door is
opened with the key removed from the ignition switch.
Locking of the vehicle using the remote handset is inhibited with the key in the ignition switch.
Slam Locking
With the introduction of CDL, slam locking of the drivers door is disabled. If an attempt is made to slam lock the
vehicle, the anti-theft alarm ECU will unlock all doors.
CDL Using the Drivers Door Sill Button
Each door has a sill button to allow that door to be individually locked from inside the vehicle. The drivers door sill
button has additional functionality which allows all doors to be locked from inside the vehicle from this one button.
When the driver door sill lock button is depressed, the CDL system enters a sill locked state, where all doors are
locked but immobilisation and perimetric and volumetric sensing is suspended. CDL using the drivers sill lock
button can be achieved with or without the key in the ignition switch and without the ignition being on.
If the CDL is in the sill locked state and the lock button on the remote handset is pressed, the volumetric and
perimetric functions of the alarm system will become active and active engine immobilisation will be invoked.
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DESCRIPTION AND OPERATION CDL Using the Key
The driver and the passenger front doors are fitted with key barrel locks. Using the vehicle key in the passenger
door will only lock or unlock that door. Using the key in the drivers door will operate the CDL system and lock or
unlock all doors.
NOTE: The passenger door key barrel is connected to the door latch and has no electrical input to
the anti-theft alarm ECU. The driver door key barrel is also connected to the door latch and its
operation is monitored by the ECU only via the latch motor and the two wires connected to it.
When the vehicle is locked using the key in the drivers door, only CDL and perimetric protection is invoked.
Volumetric protection and active immobilisation is not initiated.
CDL Using the Remote Handset
The remote handset has two buttons; lock and unlock. A single press on the lock button will lock all doors and
invoke perimetric and volumetric protection and active immobilisation. Remote locking is inhibited if the
transponder coil senses that the key is in the ignition switch.
When the vehicle is locked, a single press of the unlock button will unlock all doors and disable perimetric and
volumetric protection. Immobilisation is only disabled using the transponder coil and the remote handset or the
EKA procedure.
Security LED
In addition to the alarm system status indications, the security LED also displays CDL system status.
The system confirms that the drivers door is open by illuminating the LED for the 10 second confirmation period. If
any other door or the bonnet is open, the LED remains unlit for the 10 second confirmation period. After the 10
second confirmation period the LED reverts to the slow flash deterrent mode if the alarm is armed.
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DESCRIPTION AND OPERATION Interior Lamp Functionality
The anti-theft alarm ECU controls the interior lamp functionality. When the lamps are extinguished, they fade out
to the off condition over a 2 second period.
The lamps are turned on by:
Disarming the alarm using the remote handset
Opening any door.
When the lamps are on, they will be extinguished by the following actions:
If all doors are closed, the lamps will be extinguished after a 15 second delay period
If any door is left open, the lamps will be extinguished after an 8 minute delay period
If one of the above delay periods is active and the ignition is switched on or the alarm is armed, the lamps will
be extinguished.
ANTI-THEFT ALARM SYSTEM SELF TEST
The anti-theft alarm ECU has a self test feature which allows all alarm inputs to be tested. To enter self test mode
the following steps must be completed as follows:
1.Ensure that the driver’s door is closed and the driver’s window is open
2.Open the bonnet and with assistance depress and hold the bonnet switch
3.Release the bonnet switch and within 0.5 seconds turn the ignition switch on to position II
4.Quickly open the driver’s door
5.Turn the ignition switch to the off position
6.Turn the ignition switch back to position II
7.If the self test mode has been entered successfully, confirmation will be given by the alarm sounder. If the
ECU has not entered self test mode, repeat the above procedure.
Once in self test mode, the following test inputs will cause the security LED to illuminate and the engine
immobilised warning lamp and the hazard warning lamps to flash. When an input is operated, non illumination of
the security LED, the engine immobilised warning lamp and the hazard warning lamps indicates a fault for that
input.
Perform the following steps to test each input for correct operation:
Close and open the drivers door
Open and close each of the passenger doors and the tail door in turn
Close and open the bonnet (depress switch if bonnet still open)
With drivers door closed, lock and unlock the driver’s door using the vehicle key if spare key available. If spare
key is not available, operate driver’s sill button through open window
Press the unlock button of the remote handset. This enters the volumetric self test mode and all other inputs
will be disabled. Make a movement inside the vehicle. When the volumetric sensor is triggered the security
LED will flash.
To exit the self test mode, turn the ignition switch to the off position.
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