Security System Sounder

Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

Depending on vehicle configuration a passive sounder or a Battery Back-Up Sounder (BBUS) is located behind the side secondary bulkhead panel on the driver side.

The passive sounder is connected directly to the Body Control Module/Gateway Module (BCM/GWM) which activates the passive sounder as a secondary security sounder when the alarm is triggered.

The BBUS incorporates an integrated tilt sensor which monitors the vehicle attitude. 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) bus. An integral, rechargeable battery power feed is supplied to the BBUS if the vehicle startup battery supply from the BCM/GWM is interrupted.