Circuit arrangement for registering false release signals for a restraint system

A circuit arrangement for registering false release signals for a restraint system in a motor vehicle wherein the restraint system includes first release circuit means for generating a first release signal in response to an accident-related deceleration of the vehicle, said first release circuit means including a first deceleration sensor and an evaluation circuit connected to the latter;

• second release circuit means for responding to a predetermined threshold level of deceleration by generating a second release signal;
• and, actuating circuit means for actuating said restraint system in response to said first release signal only upon the occurrence of said second release signal simultaneoulsy with said first release signal;
• said circuit arrangement for registering false release signal comprising:
• monitoring circuit means connected to said evaluation circuit for ascertaining the occurrence of said first release signal in the absence of said second release signal from said second release circuit means;
• and,
• warning means responsive to the output of said monitoring circuit means for registering the presence of said first release signal in the absence of said second release signal from said second release means thereby establishing said first release signal occurring in this manner as a false release signal.