Patent ID: 6828901
Filing Date: 2004-12-07
Classification: B60R

Abstract:
A vehicle starting system comprising a remote starting system that is co-operable with a passive anti theft security system, wherein the security system comprises a first coil connected to a passive anti theft security system controller for transmitting a first signal to a first transponder having a third coil and a first code therein, said first transponder being responsive to said first signal to transmit said first code to said first coil, said controller allowing starting of a vehicle when said first coil receives the first code or a second code in response to transmitting the first signal, and wherein the remote starting system comprises:(a) a second transponder having said second code and a second transponder coil that couples the second transponder to the controller; (b) a fourth coil with two terminal ends, said fourth coil being wound about said second transponder so as to cause a reduction in electromagnetic coupling between said first coil and said second transponder coil when said terminal ends are shorted, said reduction preventing transmission from said second transponder of said second code to said first coil; and (c) a relay that shorts said terminal ends of said fourth coil to prevent transmission of said second code to said controller, and that selectively opens said terminal ends of said fourth coil so as not to prevent transmission of said second code to said controller.