Method for managing the operating conditions of an anti-theft security device for a motor vehicle and device therefor

Anti-theft security devices for a motor vehicle, comprise portable transmitting elements, of a receiving module on board the vehicle and of elements controlling a system for interrupting at least one circuit required for operating the vehicle (ignition circuit engine, fuel intake circuit or other . . . ) when the distance between the transmitting elements and the receiving elements exceeds a certain value. The method for managing the operation of such a device consists, when resetting the affected circuit(s), following an interruption relative to accidental signal loss, in performing this resetting only very gradually.