Tilt alarm sensor

The tilt alarm sensor registers the vehicle rest position when it is activated and detects changes in the position, e.g. jacking up the vehicle. The tilt alarm sensor is integrated in the emergency current siren.

Initialization of the tilt sensor is started 6 seconds after all doors, the trunk lid and the hood are closed. The tilt sensor is ready for operation 60 seconds from the start of initialization and is then included in the vehicle monitoring system.

If the tilt alarm sensor detects vehicle movement, a corresponding signal is sent to the ultrasonic interior movement detector. The anti-theft system decides whether the movement is sufficient to trigger an alarm.

To ensure a false alarm is not triggered as the result of the vehicle rocking, the angle values for the longitudinal and transverse axis are determined every 90 ms. An alarm is triggered only if the vehicle remains in an inclined position for longer than approximately 1.5 seconds.