1999 LAND ROVER DISCOVERY Workshop Manual

ALARM SYSTEM AND HORN
86-4-22 DESCRIPTION AND OPERATION
The code is recorded on the security information card and is entered as follows:
1Using the key, turn the driver's door lock to the UNLOCK position and hold in this position for at least 5 seconds.
An audible warning is then emitted to indicate that the body control unit is ready to accept the code. Return the
key to the centre position. It is now possible to use the key to enter the separate numerical values of the four
digits that make up the EKA code.
2Enter the first digit of the code. If the first digit is 4, turn the key to the UNLOCK position 4 times. Ensure the
key is fully returned to the centre position after each turn of the key.
3Enter the second digit of the code. If the second digit is 3, turn the key to the LOCK position 3 times. Ensure
the key is fully returned to the centre position after each turn of the key.
4Enter the third digit of the code. If the third digit is 2, turn the key to the UNLOCK position twice. Ensure the key
is fully returned to the centre position after each turn of the key.
5Enter the fourth digit of the code. If the fourth digit is 1, turn the key to the LOCK position once. Ensure the key
is fully returned to the centre position after each turn of the key.
6Finally, turn the key to the UNLOCK position and back to the centre position, a double bleep will indicate that
the code has been entered correctly. A single bleep indicates that the code has been entered incorrectly.
Then, before opening the door, wait 5 minutes for the alarm and immobiliser to be de-activated. During the 5
minute wait for the alarm and immobiliser to be de-activated, the alarm indicator LED in the instrument pack
continues to flash (one flash every 2 seconds). DO NOT OPEN THE DOOR OR ATTEMPT TO ENTER THE
CAR until the full delay period has elapsed.
When the 5 minute wait has elapsed, the alarm indicator LED stops flashing. Immediately open the door, insert
the key in the ignition switch and turn the switch to position II. If the ignition switch is not turned to position II
within 30 seconds of the end of the 5 minute wait, the engine is automatically immobilised again.
The EKA code will not be recognised if there is an interval of 10 seconds or more between key turns or if the key is
held turned for 5 seconds or more during the procedure.
In some system configurations a successful EKA code entry is indicated by the audible warning device pulsing twice
for a period of 50 ms on, 200 ms off. The theft deterrent LED is switched on for 1 second, all doors unlock, the alarm
disarms and the vehicle is remobilised allowing the engine to start.
If an incorrect code is entered, an audible warning is emitted and the procedure must be repeated. Up to a maximum
of 10 attempts to enter the code is possible. After 10 attempts, the BCU will not allow any further codes to be entered
for a period of 10 minutes.
Single point entry
Single point entry (SPE) allows the driver to unlock the driver's door while leaving all other doors locked.
There are two configurations for single point entry:
lSPE not active.
lSPE active.
To use SPE, press the unlock button on the handset once. Depressing the unlock button a second time in the space
of one minute unlocks the remaining doors. SPE is also possible by turning the key in the driver's door lock to the
unlock position once. Turning the key to the unlock position again within one minute unlocks the remaining doors.
In order for SPE to operate, the following conditions must be met:
lThe ignition is off.
lAll doors are locked.
Speed related locking
For added protection the vehicle doors can automatically lock when the vehicle exceeds a specific road speed.
There are two configurations for speed related locking:
lSpeed related locking not active.
lSpeed related locking active.
Speed related locking causes the doors to automatically lock when the vehicle exceeds a speed of 4 mph (7 km/h).
When the ignition is switched off, the doors are automatically unlocked. Depressing the instrument panel mounted
central door unlocking switch disables the speed related locking for the duration of the journey.
Speed related locking only activates once per ignition cycle. If speed related locking activates and a door is then
unlocked, the door does not automatically re-lock.

ALARM SYSTEM AND HORN
DESCRIPTION AND OPERATION 86-4-23
In order for speed related locking to activate the following conditions must be met:
lAll doors unlocked.
lEngine running.
lVehicle speed greater than 4 mph (7 km/h).
Acclimatisation related locking
Acclimatisation related locking allows the engine to be started and then the vehicle locked with a spare key and left
unattended to allow the vehicle interior to reach the desired temperature.
There are two configurations for acclimatisation related locking:
lAcclimatisation related locking not active.
lAcclimatisation related locking active.
Once the engine is started, the vehicle is locked with a spare key at the driver's door while the engine is running.
During these conditions the alarm is not armed.
In order to activate acclimatisation related locking the following conditions must be met:
lEngine running.
lAll doors closed.
Visual warnings
The direction indicators serve as a visual indication when the alarm is triggered. The direction indicators are also used
as a visual indication during lock/unlock procedures.
There are three configurations of alarm armed/disarmed indication:
lNo direction indicators on, alarm armed/disarmed/trigger.
lDirection indicators on, alarm trigger only.
lDirection indicators on, alarm armed/disarmed/trigger.
Dependent on system configuration the direction indicators flash one short pulse to confirm that the alarm is armed
and flash two short pulses to confirm that the vehicle is super locked. If the alarm is triggered the direction indicators
operate in phase with the audible warning. When the alarm is disarmed, the direction indicators flash one long pulse.
Audible warning
An audible warning device is used to indicate that the alarm has been triggered, or a mislock has occurred, or an EKA
request has occurred, or the EKA code has been entered.
There are six audible warning configurations:
lNo sound (audible warnings disabled).
lAlarm sounder only.
lVehicle horn only.
lAlarm sounder and vehicle horn.
lBBUS only.
lAlarm sounder, vehicle horn and BBUS.
Depending on which market the vehicle is sold, either the vehicle horn, a specific alarm sounder, or a BBUS operates
in phase with the direction indicators when the alarm is triggered. The audible warning device operates for
approximately 30 seconds at 0.25 second on, and 0.25 second off. The BCU allows the alarm to be triggered up to 3
times in any armed period.
Theft deterrent LED
An LED located in the instrument pack indicates the status of the alarm system.
There are eight theft deterrent alarm configurations:
lNo handset low battery warning.
lHandset low battery warning.
lNo passive immobilisation.
lPassive immobilisation.
lEngine immobilised (ignition off, LED off).
lEngine immobilised (ignition off, LED flashes).
lNo alarm tampered indication.
lAlarm tampered indication.

ALARM SYSTEM AND HORN
86-4-24 DESCRIPTION AND OPERATION
The theft deterrent LED utilises a particular flash to show the status of the following:
lAlarm armed.
lEngine immobilised.
lAlarm tampered.
lHandset low battery warning.
Transit mode
To prevent excessive battery drain during transportation to overseas markets, the vehicle is placed in a transit mode
at the end of line test.
The following functions are disabled when the vehicle is in transit mode:
lVolumetric sensors.
lPassive immobilisation.
lMobilisation of the vehicle by use of door lock.
lIgnition key interlock.
lElectric seat enable time-out with drivers door open.
To exit this mode, switch on the ignition and simultaneously hold down the heated rear window and the rear fog lamp
switch for 2 seconds.
Transit mode can be entered using Testbook.

ALARM SYSTEM AND HORN
REPAIR 86-4-25
REPAIR
Switch - central door locking
$% 86.26.30
Remove
1.Carefully remove clock assembly from louvre
panel.
2.Disconnect multiplug from door lock switch.
3.Remove door lock switch from clock.
Refit
1.Fit door lock switch to clock assembly.
2.Connect multiplug to door lock switch.
3.Position clock assembly and push to secure in
position.
Switches - horn
$% 86.30.01
Remove
WARNING: It is imperative that before any
work is undertaken on the SRS system the
appropriate information is read thoroughly.
1.Disconnect both battery leads, negative lead
first, and wait 10 minutes.
2.Remove driver's airbag module.

+ RESTRAINT SYSTEMS, REPAIRS,
Airbag module - drivers.
3.Release horn switch multiplugs and leads from
steering wheel base.
4.Disconnect horn switch multiplugs from
harness.
5.Disconnect horn switch multiplug from rotary
coupler harness.
6.Remove screw securing earth leads to steering
wheel.
7.Using a broad round edged tool, carefully prise
horn switches from steering wheel.
Refit
1.Fit to steering wheel and connect multiplugs.
2.Fit earth leads and secure with screw.
3.Secure leads and multiplugs to base of steering
wheel.
4.Fit driver's airbag module.

+ RESTRAINT SYSTEMS, REPAIRS,
Airbag module - drivers.

ALARM SYSTEM AND HORN
86-4-26 REPAIR
Vehicle horn
$% 86.30.10
Remove
1.Remove front grille.

+ EXTERIOR FITTINGS, REPAIRS,
Grille - front - up to 03MY.
2.Disconnect multiplug from horn.
3.Remove nut securing horn to body and remove
horn.
Refit
1.Fit horn to body and tighten nut to 13 Nm (10
lbf.ft).
2.Connect multiplug to horn.
3.Fit front grille.

+ EXTERIOR FITTINGS, REPAIRS,
Grille - front - up to 03MY.
Sounder - alarm
$% 86.77.10
Remove
1.Remove nut securing sounder to mounting
bracket.
2.Release sounder from mounting bracket,
disconnect multiplug and remove sounder.
Refit
1.Position sounder and connect multiplug.
2.Fit sounder to bracket and secure with nut.

ALARM SYSTEM AND HORN
REPAIR 86-4-27
Sounder - battery backed-up (BBUS)
$% 86.77.13
Remove
1.Remove rear quarter lower casing.

+ INTERIOR TRIM COMPONENTS,
REPAIRS, Trim casing - side - loadspace.
2.Remove nut securing BBUS to RH rear body
panel.
3.Disconnect multiplug and remove BBUS.
Refit
1.Position BBUS, connect multiplug and tighten
securing nut.
2.Fit rear quarter lower casing.

+ INTERIOR TRIM COMPONENTS,
REPAIRS, Trim casing - side - loadspace.
Switch - bonnet
$% 86.77.20
Remove
1.Remove rubber cover from bonnet switch.
2.Disconnect multiplug, release switch retainers
and remove switch.
Refit
1.Position switch and connect multiplug.
2.Fit rubber cover to switch,

ALARM SYSTEM AND HORN
86-4-28 REPAIR
Receiver - alarm system - models with
sunroof
$% 86.77.31
Remove
1.Remove trim seal from rear sunroof.
2.Release sunroof switch and remove screw
securing headlining.
3.Remove 2 nuts securing receiver to roof panel,
disconnect multiplug and remove receiver.
Refit
1.Connect multiplug to receiver, fit to roof panel,
tighten nuts to 10 Nm (7 lbf.ft).
2.Fit and tighten screw securing headlining.
3.Fit sunroof switch
4.Fit sunroof trim seal.
5.Connect multiplug to receiver, fit to roof panel
and secure with nuts tighten to 10 Nm (7 lbf.ft).
Receiver - alarm system - models
without sunroof
$% 86.77.31
Remove
1.Remove rear headrest. Repeat operation on
opposite side.

+ SEATS, REPAIRS, Head restraint -
third row seat.
2.Remove 'D' post trim casing. Repeat operation
on opposite side.

+ INTERIOR TRIM COMPONENTS,
REPAIRS, Trim casing - 'D' post.
3.Remove rear interior light.

+ LIGHTING, REPAIRS, Lamp - interior
- rear.
4.Release 2 studs securing rear headlining,
carefully lower lining.
5.Remove 2 studs securing alarm receiver.
6.Disconnect multiplug from alarm receiver and
remove receiver.
Refit
1.Connect multiplug to receiver.
2.Position receiver and secure with studs.
3.Position rear end of headlining, secure with
studs.
4.Fit rear interior light.

+ LIGHTING, REPAIRS, Lamp - interior
- rear.
5.Fit both 'D' post trim casings. Repeat operation
on opposite side.

+ INTERIOR TRIM COMPONENTS,
REPAIRS, Trim casing - 'D' post.
6. Fit rear headrests. Repeat operation on
opposite side.

+ SEATS, REPAIRS, Head restraint -
third row seat.
M86 5632
M86 5761

ALARM SYSTEM AND HORN
REPAIR 86-4-29
Coil - passive immobilisation
$% 86.77.35
Remove
1.Remove steering column nacelle.

+ STEERING, REPAIRS, Nacelle -
steering column.
2.Release passive coil from steering lock.
3.Disconnect illumination bulb holder and
multiplug and remove passive coil.
Refit
1.Position passive coil, connect multiplug and
illumination bulb holder.
2.Fit passive coil to steering lock.
3.Fit steering column nacelle.

+ STEERING, REPAIRS, Nacelle -
steering column.