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Bonnet switch, anti-theft alarm

Bonnet switch, anti-theft alarm





General

The bonnet switch is located on the rear left of the engine bay and acts as a sensor for the bonnet. The switch is connected to pin 41 on the TWICE control module.

Function

A pulse width-modulated (approx. 3.5%) voltage is supplied continuously from the control module via a 1 kohm pull-up in TWICE to the switch. From this voltage, the control module can detect whether the bonnet is opened when the alarm is armed by testing the voltage at the input concerned.