Land Rover Defender: Anti-Theft - Active - Description

DOOR MODULES

NOTES:

• RHD vehicle is shown, LHD vehicle is similar.
• Vehicle with 5 doors is shown. Vehicle with 3 doors is similar.

1. DDM
2. DRDM
3. PRDM
4. PDM

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.

The DRDM and the PRDM are also controlled by the BCM/ GWM. Additionally, the DDM and the PDM also control the door mirror functions.

BCM/ GWM

NOTE: RHD vehicle is shown, LHD vehicle is similar.

NOTE: When the BCM/ GWM is replaced, the new module requires configuring to the master car configuration using the Jaguar Land Rover(JLR) approved diagnostic equipment.

The BCM/ GWM controls the following components:

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

The BCM/ GWM also has a connection to the Restraints Control Module (RCM). The connection provides the 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.

IPC

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

Security system status indicator

The security system status indicator is a red Light Emitting Diode (LED) located in the IPC. When in Power Mode 0 (vehicle locked and armed), the indicator gives a visual indication of the active anti-theft system to show when the alarm is set.

When in Power Mode 6 (ignition ON), the indicator provides a visual indication of the status of the passive anti-theft (engine immobilization) system. When the immobilization system is operating correctly, the LED is illuminated for 3 seconds after in 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 (DTC) has been recorded. After the 60 seconds period, the LED flashes at different frequencies, which indicates 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

1. BBUS - If equipped
2. Passive sounder - If equipped

Depending on the vehicle configuration, 1 passive sounder or 1 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 attitude. The tilt sensor can detect when 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). An integral, rechargeable battery power feed is supplied to the BBUS when the vehicle startup battery supply from the BCM/ GWM is interrupted.

VEHICLE HORNS

1. Horn - Left
2. Horn - Right

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

NOTE: RHD vehicle is shown, LHD vehicle is similar.

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 Passenger Junction Box (PJB) provides a permanent power supply for the volumetric sensor. The sensor signals are transmitted to the BCM/ GWM assembly on LIN.

DL vehicles

The volumetric sensors are activated when the vehicle is double locked. The vehicle can be locked and alarmed with the volumetric sensors deactivated. The volumetric sensors can be achieved by single locking the anti-theft active system or by deactivating in the IPC settings menu:

• Single locking the anti-theft active system.
• Deactivating the alarm sensors in the IPC settings menu.

Single locking

In certain markets the volumetric sensors are activated on single locking as a market requirement.

The volumetric sensors are active when the startup battery voltage falls below 9V. The BCM/ GWM assembly ignores any inputs from the sensors to prevent false alarm activation.

The BCM/ GWM ignores the signals from the volumetric sensor for the first 15 - 30 seconds. The time allows the vehicle interior to settle and prevents false alarm activation.

When 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 hood latch opens, the switch closes and connects a ground to the BCM/ GWM.

SMART KEY

PEPS

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 new passive entry transceivers which are programed to the vehicle in conjunction with smart keys.

NOTE: The smart key does not need to be held adjacent to the IAU. The function is still supported to cover error states.

The RF receiver is equipped at the rear behind of the sunroof panel.

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