ALARM SYSTEM AND HORN (Description): DESCRIPTION AND OPERATION (page 6 of 12)

ALARM SYSTEM AND HORN

86-4-10 DESCRIPTION AND OPERATION

Volumetric sensors

The BCU uses volumetric sensors to detect any change in air movement within the vehicle.  There are two sensors 
located in the headlining of the vehicle.

Input/Output
The sensors require a regulated power supply of 12 volts, via the BCU. When a change in air movement is detected 
the sensors generate a 5 Hz pulse train to the BCU.

Each of the sensors have a dedicated signal input to the BCU.  Power to the sensors is supplied by the BCU.

TestBook provides the ability to monitor the real time state of the sensors.