Glass Breakage Sensor (4D)

Glass Breakage Sensor:

General












The glass breakage sensor detects sound (microphone type) and detects whether a car window has been broken. It is integrated into the rear roof light and connected to the following pins of the TWICE control module:

Voltage +12V pin no.10
Ground pin no.57
Signal pin no.58

Function
When the anti-theft alarm is armed, the glass breakage sensor is activated when it receives a power supply +12V from the control module to pin 3.

If a window is broken, the sensor detects the sound, processes the information and decides whether or not to trip the alarm. If the alarm is to be tripped, pin 58 is grounded on the TWICE control module via pin 1 on the sensor.

Once the car key has been removed from the ignition switch, the glass breakage sensor can be manually disconnected with the NIGHT PANEL button on SID. Information that it has been disconnected is sent on the bus and is read by TWICE, which deactivates the sensor.