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Frelander 2. Manual - part 513

Liftgate latch microswitch

Intrusion detection module

Battery backed sounder and tilt sensor (certain markets only) (if fitted)

Vehicle horns

Remote handset

RF receiver

Start control module

Hood microswitch

Instrument cluster alarm LED

DOOR MODULES

The door modules provide the interface between the door latch motors, the door and latch switches and the CJB. The door
modules provide door microswitch status information and enable the door motors on request from the CJB.

The rear door modules are controlled via the front door modules on the Local Interconnect Network (LIN) bus. Additionally,
the front door modules also control the exterior mirror functions.

CENTRAL JUNCTION BOX

The CJB controls the following functions:

the horns
the liftgate latch motor and microswitches (including the liftgate external release switch)
the liftgate ajar switch
the turn signal indicators
fuel filler flap operation.

The CJB also has a connection to the Restraints Control Module (RCM) for automatic operation of the interior lights and the
turn signal indicators in the event of an accident.

• NOTE: If the CJB is replaced, the new module will require configuring to the master car configuration using a Land Rover
approved diagnostic system.

The CJB automatically arms and disarms the active anti-theft system when the vehicle is locked and unlocked after
successful confirmation that a valid remote handset has been used.

INSTRUMENT CLUSTER

The instrument cluster controls the alarm indicator which is incorporated in the main display in the instrument cluster.

The instrument cluster also controls, in conjunction with the CJB, the Engine Control Module (ECM) and the Anti-lock Brake
System (ABS) module, the engine immobilization. The ECM controls the engine crank and fuel functions and the ABS
module controls the tilt function. The EMS and ABS module communicate to each other after the CJB processes the valid
remote handset information.

Alarm Indicator

The alarm indicator is a Light Emitting Diode (LED) located in the instrument cluster. When the ignition is off, the indicator
gives a visual indication of the active anti-theft system to show if the alarm system is set or unset.

When the ignition is on, the indicator provides a visual indication of the status of the passive anti-theft (engine
immobilization) system. If the immobilization system is operating correctly, the LED will be illuminated for 3 seconds at
ignition on and then extinguish.

If a fault exists in the immobilization system, the LED will be either permanently illuminated or flashing for 60 seconds.
This indicates that a fault exists and a fault code has been recorded. After the 60 second period, the LED will flash at
different frequencies which indicate the nature of the fault.

Item

Part Number

Description

Alarm indicator

Operation of the alarm indicator is controlled by the instrument cluster which varies the flash rate of the LED to indicate
the system status of the alarm and the immobilization systems.

Alarm/Immobilization Status

Alarm Indicator

Status

Alarm Indicator Function

UNSET

No flash

LED is off

SET - with perimeter alarm

Flashing

LED will flash twice quickly with a long interval between and is
repeated 10 times. Slow 'active' flash then follows.

SET - with volumetric alarm

Flashing

LED will flash three times quickly with a long interval in between
and is repeated 10 times. Slow 'active' flash then follows.

ACTIVE

Flashing

Slow flash once alarm is activated at a frequency of 100ms on and
200ms off.

UNSET - alarm activated during
previous SET cycle

Flashing rapidly LED will flash rapidly until the CJB receives an accessory power

mode 4 signal.

VEHICLE HORNS

The vehicle horns are located in the front bumper armature. The horns are connected directly to the CJB which activates
the horns when the alarm is triggered.

BATTERY BACKED SOUNDER (if fitted)

The battery backed sounder (or battery backed sounder with tilt function) is located in the LH rear corner of the engine
compartment and is attached to the fire shield. The sounder is only fitted in certain markets.

On vehicles with a battery backed sounder, a tilt sensor can be incorporated which monitors the vehicle attitude. The CJB
monitors the tilt sensor and can detect if the vehicle is being moved, towed or raised and activate the alarm. The type of
battery backed sounder can be identified by a suffix change to the part number; sounders without a tilt sensor have the
suffix 'A' and sounders with a tilt sensor have the suffix 'B'.

Operation of the sounder is controlled by the CJB on a LIN bus. The sounder is also connected with a permanent battery
supply via the CJB. An integral, rechargeable battery powers the sounder if the vehicle battery supply from the CJB is
interrupted.

INTRUSION DETECTION MODULE

The intrusion detection module is an optional fitment in some markets and is not available in other markets. The intrusion
detection module comprises four sensors which allow the interior of the vehicle to be monitored. The module is located in
a central position on the vehicle headliner.

The intrusion detection modules are activated with the volumetric mode which in turn is enabled when the vehicle is
double locked. The vehicle can be locked and alarmed with the module deactivated if a pet is to be left in the vehicle for
example, by single locking the active anti-theft system.

When volumetric mode is active, if the vehicle battery voltage falls to below 9 volts, the CJB will ignore any inputs from
the module to prevent false alarm activation.

PRINCIPLES OF OPERATION

The CJB automatically arms and disarms the active anti-theft system when it operates the Central Locking System (CLS).

On vehicles without an intrusion detection module, only the perimeter mode is available to monitor the hinged panels and
the validity of the remote handset.

When perimeter mode is active, the CJB monitors panel ajar switches located in the latch mechanisms of the front and
rear doors and the liftgate. A separate hood ajar microswitch, located in RH hood latch mechanism in the engine
compartment, monitors the hood status.

When volumetric mode is active, the CJB monitors the interior of the vehicle for movement using an intrusion detection
module located in the centre of the headliner.

Arming

On vehicles without an intrusion detection module and a tilt sensor, the active anti-theft system is armed in the perimeter
mode when the vehicle is either locked or double locked.

On vehicles fitted with an intrusion detection module, the system has 2 modes of operation; perimeter mode and
volumetric mode.

Perimeter mode

Perimeter mode only monitors the hinged panels and validity of the remote handset in the start control module. Perimeter
mode is activated by a single press of the lock button on the remote handset.

Volumetric Mode

Volumetric mode monitors the vehicle interior for intrusion. If the vehicle is fitted with a battery backed sounder, which
incorporates a tilt sensor, the vehicle attitude is also monitored when volumetric mode is active. Volumetric mode is
activated by a second press of the lock button on the remote handset. The second press of the button must occur within 3
seconds of the first press. The second press of the lock button also activates the perimeter mode double locking feature.

The CJB arms the active anti-theft system when it locks or double locks the vehicle, providing all the following conditions
are met:

All doors, liftgate and hood are closed
The CJB is not in transit mode.

When the vehicle has successfully completed its locking routine, confirmation will be given by a single flash of the turn
signal indicators to indicate the locked condition. If double locking is activated, then the confirmation will be given by a
double flash of the turn signal indicators; one flash for locked and one long flash for double locked.

Mislock

If any doors, liftgate or hood is open when a lock or double lock request is received, the active anti-theft alarm system
remains disarmed and the CJB generates a short mislock sound from the vehicle horns or battery backed sounder and the
turn signal indicators will not flash. Each attempt to lock will be confirmed by an audible chime being emitted.

When the CJB arms the active anti-theft system, it first enables perimeter mode and monitors the status of the hinged
panels. If the vehicle is fitted with a battery backed sounder, an arming signal is sent from the CJB to enable the sounder.
If the vehicle is double locked and fitted with an intrusion detection module, the CJB then sends an arming signal to the
module and the tilt sensor when double locked. The CJB ignores the signals from the intrusion detection module for the
first 30 seconds to allow time for the vehicle interior to settle and prevent false alarm activation.

If the liftgate is opened via the remote handset, the intrusion detection module and the tilt sensor are inhibited until the
liftgate is closed.

Disarming

The CJB will disarm the active anti-theft system to prevent false alarm activation under certain conditions as follows:

When the active anti-theft system is armed in volumetric mode, if the vehicle battery voltage decreases to less
than 9 volts, the CJB will disable the volumetric mode and remain in perimeter mode only. This prevents false
alarm activation because the intrusion detection module cannot operate correctly below 9 volts.
On vehicles fitted with a battery backed sounder, if the vehicle battery voltage decreases from 9.5 to 9 volts in
more than a 30 minute period, the CJB de-activates the battery backed sounder and, if required, will use the
vehicle horns to sound an audible alarm trigger warning. This prevents false alarm activation. At voltages below 9
volts, the CJB will not generate the 'heartbeat' signal to the battery backed sounder. The battery backed sounder
interprets this as the CJB has been tampered with and activates its sounder. If the battery voltage subsequently
rises to more than 9.5 volts, the CJB will re-arm the battery backed sounder.
If the vehicle is unlocked using the unlock button on the remote handset and, within 60 seconds a hinged panel is
not opened, the CJB automatically re-locks the vehicle and re-arms the active anti-theft system (if the 'auto re-lock'
feature is enabled). This prevents leaving the vehicle unlocked and disarmed by accidental operation of the remote
handset unlock button.

Alarm

When the alarm is triggered, the CJB activates audible and visual warnings. The audible warnings are produced by the
vehicle's horns or the battery backed sounder. Visible indications are produced using the turn signal indicators.

The CJB activates the vehicle horns or battery backed sounder and the visual indications for 30 seconds. The activation is
stopped for 5 seconds and, if the alarm trigger is still present, the CJB will cycle again for 30 seconds (60 seconds in
certain markets). This will be repeated for up to a maximum of 10 cycles (3 cycles in certain markets) of 30 seconds (60
seconds in certain markets) for any one arming period. The CJB will de-activate the alarm if the 10 cycles (3 cycles in
certain markets) have been completed and the alarm trigger is still present or until it receives a disarm signal.

• NOTE: If the battery backed sounder is triggered due to tamper detection, the visual indication using the turn signal
indicators is not activated.

The alarm can be triggered by any of the hinged panels being opened, the intrusion detection module detects a movement
inside the vehicle, the tilt sensor detects vehicle movement or an ignition tamper is detected (invalid remote handset).

Battery Backed Sounder

When the CJB arms the active anti-theft system, in either the perimeter mode or the volumetric mode, the CJB sends an
arming signal to the battery backed sounder on the LIN bus. W hen the system is armed in the volumetric mode, the CJB
also sends an arming signal to the tilt sensor (if fitted).

• NOTE: If a battery backed sounder is fitted, it is also armed with the perimeter mode lock request.

On receipt of the arming signals, the sounder and the tilt sensor respond with a status message. If the CJB does not
receive the status signals within 12 seconds, the CJB assumes there is a fault and responds with a disarm signal to either
the sounder and/or the tilt sensor and stores a related fault code. If the sounder is disarmed when the active anti-theft
system is armed and the system is subsequently triggered, the CJB energizes the horn relay and uses the vehicle horns to
sound the audible warning in place of the sounder.

When the sounder is armed, the CJB sends a periodic (heartbeat) signal to the sounder which prompts the sounder to
monitor the vehicle battery supply and the LIN bus link with the CJB. The sounder will operate if:

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