Glass breakage sensor (5D)
| Glass breakage sensor (5D) |
| General |
The glass breakage sensors are acoustically sensitive (microphone type) and detect whether a car window has been broken. The front sensor (main sensor) is integrated in the centre ceiling lamp and is connected to TWICE on the following pins:
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Voltage +12V
|
pin no. 10
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Ground
|
pin no. 57
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Signal
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pin no. 58
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The rear sensor (slave sensor) is integrated in the luggage compartment ceiling lamp and is connected to TWICE via the front sensor contact 2 on the following pins:
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Voltage +12V
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pin 2
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Ground
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pin 3
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Signal
|
pin 1
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| Function |
When the anti-theft alarm is armed, the glass breakage sensor is activated by a +12V supply from control module pin 2.
If a window is broken, the sensor will detect the noise, process the information and decide whether the alarm should be set off or not. If the alarm is to be set off, pin 58 on TWICE will be grounded 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 CLEAR button. Information that it has been disconnected is sent on the bus and is read by TWICE, which deactivates the sensor.
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