Abstract: A system for preventing unauthorised use of a vehicle having an engine housing and a device for enabling starting of the engine amongst other ancillary features is disclosed. The system provides a wireless smart card reader and a smart card which, may be a multi-function smart card for use with the reader. A circuit is provided in the system which disables operation of the vehicle. The circuit is integrated for electrical disablement by the smart card reader. The circuit includes an interrupt circuit connected to the device for enabling starting of the vehicle. The circuit is primarily directed to selective interruption. The circuit is positioned directly within the engine housing in order to prevent tampering or any other activity which would render the circuit inoperative or bypassed. As a further feature, the system, provide access to a building and the building can communicate with the wireless card reader associated with a vehicle to effect operation of the vehicle.

Abstract: A method to prevent unauthorized use and/or access to a vehicle is disclosed. The method includes apparatus which is positioned within a known motor housing and actuable only within the motor housing. In one embodiment, an ignition generator coil interrupt circuit is provided and mounted directly within the housing of the motor. A switch is connected to the circuit which allows power interruption to the ignition generator coil. When the switch is activated, power interruption of said ignition generator coil is achieved to disable the engine from normal operation. Conveniently, the interrupt circuit is positioned entirely within the housing and therefore inaccessible for tampering. In another embodiment a switch circuit is positioned between an ECM motherboard and sensors typically associate with an automobile engine. This circuit is useful for arrangements which do not include a magneto/stator arrangement.