Patent ID: 7358849

Claim:
A vehicle anti-theft system comprising: a wireless transmission means mounted within a vehicle for continuously transmitting a discrete coded wireless interrogating signal within a predefined transmission field surrounding a vehicle; a remote means in discrete wireless communication with said transmission means when said remote means is within the predefined transmission field; a security means for automatically initiating a vehicle security measure whenever said remote means is outside the predefined transmission field, wherein said security means includes a microprocessor in communication with the transmission means, a receiver and a vehicle operation control device, said transmission means transmitting the continuous interrogation signal within the predefined field to trigger an authorized response signal from said remote means to place said control device in a first state associated with routine vehicle operation, whereupon said remote means being outside said transmission field results in absence of said authorized response signal causing said microprocessor to place said control device in a second state associated with vehicle disablement; a bypass means for temporarily disabling transmission of the interrogating signal allowing a user to safely perform maintenance without affecting a status of said control device.