block 80 however if the tilt of the vehicle is changed so that the state of any one of level sensor switches 78a to 78f is changed an output is provided by parity check block 80 this would occur for example if someone attempted to jack up the vehicle so as to attempt to steal the tires or the entire vehicle in this event or gate 76 conducts a detected motion pulse to the set input of flip flop 72 once flip flop 72 is reset by a logic high level on line 66 either a discharge current above the threshold level needed to trigger threshold comparator 40 or an output generated by a change in the state of one of level sensors 78a to 78e will set flip flop 72 when this occurs the output of flip flop 72 which is provided to the enable input of an entry delay timer 86 causes entry delay timer 86 to begin an entry delay interval a switch 88 associated with timer 86 provides a fifteen second delay until an output is produced by timer 86 if it is open or a 10 second delay if it is closed switch 88 is set for the preference of.