COMPONENT LOCATION - 1 OF 2

COMPONENT LOCATION - 2 OF 2

The active anti-theft system monitors all doors, hood and tailgate for unauthorized opening. In some markets the anti-theft system also incorporates monitoring of the vehicle interior and vehicle tilt sensing.

The following body system control modules control the active anti-theft system:

• The BCM/GWM
• The DDM
• The PDM
• The DRDM
• The PRDM
• The Instrument Panel Cluster Control Module (IPC)
• The RFA.

The BCM/GWM is the main controller in the system.

The BCM/GWM controls the following security functions, in addition to other vehicle functions:

• Single locking, double locking (market dependent) and unlocking (both central unlock and single point entry).
• Monitoring of hood switch, door ajar switches and the tailgate ajar switch of the central door locking system.
• The Passive Entry Passive Start (PEPS) system.
• The volumetric sensor.
• Smart key transponder reading.
• Security sounder - Passive sounder or BBUS.
• Passive arming and disarming.
• Panic alarm function.
• Interior lighting.

Depending on vehicle configuration, 2 levels of vehicle anti-theft alarm are available:

• Perimeter sensing mode - Monitors all opening panels.
• Perimeter with alarm sensing mode - Monitors the vehicle interior for intrusion and it also incorporates a tilt sensor to monitor if the vehicle is being moved.

A visual (through the turn signal indicators) and audible alarm is emitted through the security sounder and vehicle horns (market dependent) in the event of unauthorized access. The alarm is also triggered in the event of an unauthorized start request.

Smart Key

The smart key provides the following functionality:

• Unlock (central unlock or single point entry)
• Single lock and double lock (market dependent)
• Tailgate release
• Approach lighting
• Panic alarm.

The lock and unlock switches also control a 'lazy' lock and unlock feature. The 'lazy' lock and unlock feature automatically closes or opens the windows with an extended press of the applicable switch. This feature is only available in certain markets and is controlled in conjunction with the door modules.

The smart key contains an emergency key. The emergency key can be used in the event of failure of the smart key or the startup battery to unlock the vehicle. The driver door handle contains a concealed mechanical key barrel which can be used with the emergency key to access the vehicle. The emergency key to access the vehicle does not disable the perimeter sensing system. The visual and audible alarm is activated when the door is unlocked/opened. To cancel the alarm, the smart key must be held next to the and the ignition switch must be operated.

Remove the cover and insert the emergency key into the aperture to mechanically lock each door in turn. The driver door is always the last door to be locked. Please make sure that the emergency key is removed from the emergency key aperture before each door is closed.

For additional information, refer to: Handles, Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Description and Operation).

DOOR MODULES

The door modules provide the interface between the door latches and the BCM/GWM. The door modules provide door latches status information and enable the door motors on request from the BCM/GWM.

Each door modules are controlled by the BCM/GWM through the High Speed (HS) Controller Area Network (CAN) body systems bus. Additionally, the DDM and the PDM also control the door mirror functions.

BODY CONTROL MODULE/GATEWAY MODULE

The BCM/GWM locates in the instrument panel, behind the glovebox.

The BCM/GWM controls the following functions:

• The horns
• The tailgate latch
• The tailgate ajar switch
• The turn signal indicators
• The fuel flap operation.

The BCM/GWM 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.

The BCM/GWM automatically arms and disarms the active anti-theft system when the vehicle is locked and unlocked. This is after successful confirmation that a valid smart key has been used.

INSTRUMENT PANEL CLUSTER

The BCM/GWM controls the security system status indicator which is incorporated in the main display in the IPC.

The IPC also controls the engine immobilization, in conjunction with the following control modules:

• The BCM/GWM
• The Powertrain Control Module (PCM)
• The Anti-Lock Brake System Control Module (ABS).

The PCM controls the engine crank and fuel functions and the ABS controls the tilt function. The PCM and ABS communicate to each other after the BCM/GWM processes the valid smart key information.

When the vehicle is in Power Mode 6 (ignition 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 after Power Mode 6 (ignition ON) and then extinguishes.

When a fault exists in the immobilization system, the LED is either permanently illuminated or flashing for 60 seconds. The LED indicates that a fault exists and a Diagnostic Trouble Code(s) (DTC) has been recorded. After the 60 second period, the LED flashes at different frequencies which indicate the nature of the fault.

Operation of the security system status indicator is controlled by the IPC. The IPC varies the flash rate of the LED to indicate the system status of the alarm and the immobilization systems.

Operation of the security system status indicator is also controlled by the BCM/GWM.

SECURITY SYSTEM SOUNDER

Depending on vehicle configuration there is a passive sounder or a BBUS is located behind the secondary bulkhead panel on the driver side.

The passive sounder is connected directly to the BCM/GWM. The BCM/GWM activates the passive sounder as the first security sounder when the alarm is triggered.

The BBUS incorporates an integrated tilt sensor which monitors the vehicle altitude. The tilt sensor can detect if the vehicle is being moved, towed or raised. The tilt sensor communicates to the BCM/GWM to indicate a trigger to activate the alarm.

Operation of the BBUS and tilt sensor is controlled by the BCM/GWM on the Local Interconnect Network (LIN) connection. An integral, rechargeable battery power feed is supplied to the BBUS if the vehicle startup battery supply from the BCM/GWM is interrupted.

VEHICLE HORNS

The vehicle horns are located above the front bumper armature. The horns have a switched power supply through the horn relay located in the Engine Junction Box (EJB). The horns are switched through the steering wheel, connected through the clockspring to the BCM/GWM. The BCM/GWM activates the horns as a secondary security sounder when the alarm is triggered.

VOLUMETRIC SENSOR - IF EQUIPPED

The volumetric sensor is located in a central position in the overhead console. The volumetric sensor comprises 3 sensors which allow the passenger compartment to be monitored. The BCM/GWM provides a permanent power supply for the volumetric sensor. The sensor signals are transmitted to the BCM/GWM on a LIN connection.

When volumetric sensors are active and the vehicle battery voltage falls below 9V, the BCM/GWM ignores any inputs to prevent false alarm activation.

The BCM/GWM ignores the signals from the volumetric sensor for the first 15 - 30 seconds. This allows time for the passenger compartment to settle and prevent false alarm activation.

If the tailgate is opened through the smart key, the volumetric sensor and the tilt sensor are inhibited until the tailgate is closed.

HOOD SWITCH

The hood switch is attached to the underside of the left hood latch and operated by movement of the latch mechanism. When the latch opens, the switch closes and connects a ground to the BCM/GWM.

SMART KEY

The PEPS system includes enhancements to further improve vehicle security.

The smart key includes ultra wide band technology, designed to combat the latest security threats. Ultra wide band technology includes 2 passive entry transceivers, which are programed to the vehicle in conjunction with smart keys.

For additional information, refer to:

PASSIVE ENTRY TRANSCEIVER

There are 2 passive entry transceivers in the vehicle. There is 1 passive entry transceiver located in the top of the instrument panel, adjacent to the center speaker. The second passive entry transceiver is located on the rear of the headliner, above the loadspace area.

The passive entry transceivers are used to locate the position of the smart key from the vehicle. The passive entry transceivers communicate with the RFA through a LIN connection. Each passive entry transceiver has a power supply from the Passenger Junction Box (PJB) and a ground connection.

When the passive entry sequence is initiated and a smart key is detected within the range, the passive entry transceivers calculate the distance of the smart key. Then the RFA allows the authorization of the smart key only if this distance is within permissible limits.

For additional information, refer to: Handles, Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Description and Operation).

DISARMING

The BCM/GWM automatically arms and disarms the anti-theft system when it operates the central door locking system. The BCM/GWM also locks and unlocks the Electric Steering Column Lock (ESCL) (if equipped) when it operates the central door locking system.

On vehicles without a volumetric sensor, only the perimeter mode is available to monitor the hinged panels and the validity of the smart key.

When perimeter sensing is active, the BCM/GWM monitors aperture ajar switches. The ajar switches are located in the latch mechanisms of the doors, in the tailgate and hood latch.

When volumetric sensors are active, the BCM/GWM monitors the passenger compartment for movement using the volumetric sensor.

When the tilt sensors are active, the BCM/GWM monitors the vehicle for raising using a tilt sensor located within the BBUS.

ARMING

Smart key switch selection and the lock/unlock switch selection on the exterior door handles are relayed to the BCM/GWM. The signal is sent by the RFA on the HS CAN body systems bus.

Perimeter mode only monitors the hinged panels and validity of the smart key in the RFA.

Perimeter with alarm sensing mode is activated by the following manner:

• A second press of the lock switch on the smart key.
• Using the lock switch on 1 of the exterior door handles, on vehicles with the passive entry system.

The second press of the switch must occur within 3 seconds of the first press. The second press of the lock switch also activates the perimeter sensing double locking feature.

In certain markets (Benelux) the volumetric sensors (if equipped) are activated on single lock as per latest market requirements.

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

• All doors, tailgate and hood are closed.
• The BCM/GWM is not in transit mode.

When the vehicle has successfully completed its locking routine, a single short flash of the turn signal indicators indicates the single locked condition.

If double locking is activated, then the confirmation will be given by:

• A double flash of the turn signal indicators.
• 1 short flash for locked.
• 1 long flash on completion of double locked.

If ‘audible lock warning’ is enabled, an audible chirp shall also be emitted from the BBUS on double lock. This feature can be turned on and off in the 'Vehicle settings' menu on the IDMA.

Mislock

When a lock or double lock request is received from a smart key, the anti-theft security system remains disarmed when:

• Any doors, tailgate or hood is open/ajar.
• Vehicle is in Power Mode 6 (ignition ON).

The BCM/GWM generates a short mislock sound from the BBUS or the passive sounder. The turn signal indicators do not flash. Each attempt to lock is confirmed by an audible chime being emitted.

Disarming

The BCM/GWM disarms the active anti-theft system to prevent false alarm activation under certain conditions as follows:

• The system is in perimeter with alarm sensing mode and the startup battery voltage decreases to less than 9V. - The BCM/GWM disables the perimeter with alarm sensing mode and remain in perimeter mode only. This prevents false alarm activation because the volumetric sensor cannot operate correctly below 9V.
• The BCM/GWM deactivates the BBUS when the startup battery voltage decreases from 9.5V to 9V in more than a 30 minute period. At voltages below 9V, the BCM/GWM does not generate the 'heartbeat' signal to the BBUS. The BBUS interprets this as the BCM/GWM has been tampered with and activates its sounder. When the startup battery voltage subsequently rises to more than 9.5V, the BCM/GWM re-arms the BBUS.
• The vehicle automatically re-locks and re-arms the active anti-theft system when unlocking the vehicle and within 40 seconds a hinged panel is not opened. The function prevents leaving the vehicle unlocked and disarmed by accidental operation of the smart key unlock switch/exterior handle.

Alarm

When the alarm is triggered, the BCM/GWM activates audible and visual warnings. The audible warnings are produced by the passive sounder or the BBUS and the horns (market dependent). Visible indications are produced using the turn signal indicators.

The BCM/GWM activates the following components:

• The passive sounder or the BBUS.
• The horns.
• The visual indications.

The BCM/GWM activates the components for 30/60 seconds, depending on the market. The activation is stopped for 10 seconds. When the alarm trigger is still present, the BCM/GWM will cycle again for 30/60 seconds. The activation repeats for up to a maximum of 10 cycles (3 cycles in certain markets) per trigger source of 30/60 seconds for any 1 arming period.

The BCM/GWM will ignore the trigger cause 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.

The alarm can be triggered by:

• Any of the hinged panels being opened.
• Any of the doors being unlocked.
• The volumetric sensor detects a movement inside the vehicle.
• The tilt sensor detects vehicle movement.
• An ignition tamper is detected (invalid smart key).

BATTERY BACK-UP SOUNDER

On receipt of the arming signals, the BBUS and the tilt sensor respond with a status message. If the BCM/GWM does not receive the status signals within a period of time, there is a fault in the system. The BCM/GWM responds with a disarm signal to either the sounder and/or the tilt sensor and stores a related DTC. The sounder is disarmed when the active anti-theft system is armed and the system is subsequently triggered. The BCM/GWM still energizes the horn relay and uses the horns to sound the audible warning in place of the BBUS.

When the BBUS is armed, the BCM/GWM sends a periodic (heartbeat) signal to the BBUS. The signal prompts the BBUS to monitor the startup battery supply and the LIN connection with the BCM/GWM.

The BBUS operates in the following cases:

• The BBUS receives an alarm signal from the BCM/GWM or the tilt sensor.
• The power supply or the LIN connection to the BCM/GWM is disrupted.

The tilt sensor measures the longitudinal and lateral angle of the vehicle over a range of ±16° from the horizontal. When the active anti-theft system is armed in perimeter with alarm sensing mode, the tilt sensor:

• Stores the current vehicle angles in its memory.
• Monitors the tilt sensor readings.

When the vehicle angle changes in either direction by more than the alarm limit threshold, the tilt sensor communicates to the BCM/GWM in order to activate the BBUS.

When the security system is active and the battery or the BBUS is disconnected, the BBUS continues to sound without the visual indication of the turn signal indicators flashing.

SINGLE POINT ENTRY

The single point entry feature only unlocks the driver door, all other doors remain single locked. A single press of the unlock switch on the smart key, only unlocks the driver door. A second press is required to unlock the remaining doors and the tailgate.

When the vehicle is double locked, the first press of the unlock switch on the smart key unlocks the driver door.

The remaining doors revert to the single locked state and can therefore be unlocked using the following:

• A further press of the smart key unlock switch.
• The central door locking lock/unlock switch on the driver door.
• The interior door handles on the passenger doors.
• Passive entry through any passenger door.

Access to the tailgate can be achieved through:

• A further press of the smart key unlock switch.
• The smart key tailgate open switch.
• The tailgate open switch on the instrument panel.
• The central door locking lock/unlock switch on the driver door.
• The interior door handles on the passenger doors.
• Passive entry through any passenger door.
• Passive entry through the tailgate open switch.

Changing from central door locking to single point entry can be done by:

• Pressing the lock and unlock switches on the smart key simultaneously. The turn signal indicators flash to confirm that the function change has been performed.
• Using the 'Vehicle settings' menu on the IDMA.

GLOBAL OPEN/CLOSE

A global open and close feature can be operated from the smart key. This feature allows the vehicle windows to be opened/closed through a single press of the lock or unlock switch. The switch must be pressed and held for more than 2 seconds to activate the global open/close feature. The windows must be initialized for the global functionality to work.

SMART KEY ADDITIONAL FEATURES

In addition to the lock and unlock switches, the smart key has convenience switches.

To cancel the panic alarm feature perform 1 of the following:

• Operate the panic alarm switch 3 times.
• Press and hold the panic switch for 3 seconds.
• Operate the ignition switch.

To prevent accidental cancellation, the panic alarm cannot be canceled within 5 seconds of being activated.

The following systems become active in convenience mode:

• Memory - Seat adjustment and mirror position.
• Interior and exterior lighting.
• Audio system.
• The IPC message center.
• Horn.
• Cigar lighter/12V accessory socket.

ULTRA WIDE BAND OPERATION

With the introduction of ultra wide band technology, recognizing the position of the smart key requires 2 pieces of distance information. There are 2 passive entry transceivers installed in the vehicle. The 2 passive entry transceivers provide full coverage inside and outside of the vehicle.

The following process takes place to validate the smart key:

• The RFA receives a door lock/unlock request.
• On receipt of the door lock/unlock request, challenge data is sent out from the RFA, through the Low Frequency (LF) antennas at 125 kHz to the smart key.
• The smart key responds to the LF signal, processing the received message and replying to the vehicle using a separate RF channel:
  • 433 MHz for Europe and Rest of World (ROW) market vehicles.
  • 315 MHz for North American Specification (NAS) and Japan market vehicles.
• This response is received be the RF receiver, which transmits the data to the RFA.

In addition, the RFA sends a separate challenge through the passive entry transceivers to the smart key.

The RFA sends this separate challenge in order to authenticate and obtain the smart key position with accuracy, using the following process:

• The challenge data is sent from the RFA through LIN connection to the passive entry transceivers.
• The passive entry transceivers process and transmit the data, through a separate RF signal, at 3.99 GHz (4.5 GHz in China) to the smart key.
• On receipt of the signal the smart key responds with an authentication message back to the passive entry transceivers. The respond is sent through a RF signal on the LIN connection.

When the smart key is validated the system operates in the normal way.

LOW FREQUENCY ZONES

The message contained in the beacon signals varies based on each transmitter zone.

For example, the message could vary based on if the zone was:

• Inside or outside the vehicle.
• On the driver side or the passenger side.
• In the loadspace.

This capability allows the smart key to send specific answers, triggering actions such as opening the passenger door or starting the engine.

A common security threat consists of relaying the messages exchanged between the vehicle and the smart key over long distances. This message range is indefinite, depending on the technology used. The attack is instigated by intercepting the beacon signal from the LF antenna in the vehicle to the smart key.

The equipment used to intercept the messages, exchanged between the vehicle and the smart key. The equipment is used to gain illegal entry to the vehicle and activate the passive start system.

For additional information, refer to: Anti-Theft - Passive (419-01B Anti-Theft - Passive, Description and Operation).

DIAGNOSTICS

The BCM/GWM records any DTC and related data. Read the DTC and related data with the JLR approved diagnostic equipment. The JLR approved diagnostic equipment can read live data and activate certain components.

CONTROL DIAGRAM - 1 OF 2 - SMART KEY RECOGNITION AND DETECTION

A = HARDWIRED: F = RF TRANSMISSION: O = LIN: W = LF TRANSMISSION: AZ = HS CAN BODY SYSTEMS BUS: AH = SERIAL COMMUNICATION LINE.

CONTROL DIAGRAM - 2 OF 2

A = HARDWIRED: F = RF TRANSMISSION: O = LIN: AZ = HS CAN BODY SYSTEMS BUS: BA = HS CAN HUMAN MACHINE INTERFACE (HMI) SYSTEMS BUS.