Michael J Kachman

US Patent:

6479908, Nov 12, 2002

Filed:

Apr 20, 2000

Appl. No.:

09/552774

Inventors:

Thomas E. Utter - Royal Oak MI
Carol L. Daprai - Lake Orion MI
Kerfegar K. Katrak - Fenton MI
David T. Proefke - Madison Heights MI
Thomas M. Forest - Macomb MI
Michael J. Kachman - Ray Township MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B60R 2504

US Classification:

307 103, 307 106

Abstract:

An ignition switch sensor having a plurality of contacts arranged on a sensor to make intermittent contact with a movable contact and generate a first plurality of outputs corresponding to the position of the movable contact relative to the plurality of contacts. A power mode module receives the first plurality of outputs and compares the outputs to data stored within the memory of the module and provides a second plurality outputs according to the value of the first plurality of outputs. A theft resistor may be integrated into the ignition switch sensor circuitry to facilitate protection from tampering and unauthorized starting of the vehicles engine.