Patent ID: 6084531
Filing Date: 2000-07-04
Classification: B60R

Abstract:
An enabling device for a motor vehicle having an electronic ignition system and a passive anti-theft system comprising:an engine control circuit for controlling the electronic ignition system of the motor vehicle;a passive anti-theft control circuit electrically connected to said engine control circuit for controlling the passive anti-theft system;a transceiver transmitting a request signal and receiving a key code;a transponder receiving the request signal from said transceiver and emitting the key code to be received by said transceiver throughout a time the electronic ignition system is on;a bidirectional port electrically connected to said transceiver and said passive anti-theft control circuit, said passive anti-theft control circuit sending the request signal for the key code through said bidirectional port to said transceiver, said transceiver amplifying the request signal and sending the request signal to said transponder, said transponder sending the key code back to said transceiver, said transceiver sending the key code through said bidirectional port to said passive anti-theft control circuit;a latch electrically connected to said passive anti-theft control circuit to receive an input from said passive anti-theft control circuit when the key code matches a predetermined code, said latch being set by said passive anti-theft control circuit upon receiving the input to allow operation of the electronic ignition system;an output port electrically connected to the electronic ignition system; andan output enable circuit electrically connected to said latch and said engine control circuit and said output port to enable said output port to operate the electronic ignition system upon receiving an input from said latch upon said latch being set to open said output port.