Immobilizer for preventing unauthorized starting of a motor vehi

Details Immobilizer for preventing unauthorized starting of a motor vehi Immobilizer for preventing unauthorized starting of a motor vehi

1996-02-20

1997-10-07

Teska, Kevin J.

Boots, shoes, and leggings

364424034, 36442404, 307 102, 307 106, 3408253, 34082532, 340426, B60R 2504

Patent

active

056754906

ABSTRACT:
An immobilizer for a motor vehicle and a method for operating the immobilizer include a test unit, control devices connected through a data line to the test unit, and at least one ignition key having a transponder. When the ignition key is actuated, the test unit transmits a request signal through the data line to all of the control devices, which respond thereto by transmitting back identification codes which are compared with desired codes. The test unit prevents starting of the motor if fewer than a prescribed number of control devices reply with their identification code. The test unit enables all of the control devices if at least the prescribed number of control devices reply with their identification code word, in the event of interrogation.

REFERENCES:
patent: 4366466 (1982-12-01), Lutz
patent: 4477874 (1984-10-01), Ikuta et al.
patent: 4980680 (1990-12-01), Knoll et al.
patent: 5229648 (1993-07-01), Sues et al.
patent: 5382948 (1995-01-01), Richmond
patent: 5473200 (1995-12-01), Woo
patent: 5514914 (1996-05-01), Selem et al.

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