A method and apparatus to start the restraint device

(57) to avoid starting the wrong with little cost as possible SUMMARY], the method and apparatus of the present invention to start the restraint device, an acceleration sensor device having two sensitive axes oriented in different directions (1) a. Acceleration measured for one of the two sensing axes is used authenticity checking the determination of activation (4,5), and the activation determination is derived from the acceleration measured for another one of the sensitive axes. Here only when activation determination signal to the input side and the authenticity signal of the AND coupling circuit (6,7,13,14) is supplied simultaneously, the trigger signal (a1, a2, a3, a4) are formed .