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Immobilizer system for vehicles

  • US 7,272,469 B2
  • Filed: 03/03/2004
  • Issued: 09/18/2007
  • Est. Priority Date: 03/03/2004
  • Status: Active Grant
First Claim
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1. A vehicle immobilization system comprising:

  • a microprocessor connected to at least one critical run circuit of a vehicle, the microprocessor operable in a run mode and an armed mode;

    an input system, operatively connected to the microprocessor, configured to provide user input to the microprocessor;

    at least one sensor, operatively connected to the microprocessor, for configured to trigger the microprocessor to enter the armed mode;

    wherein the microprocessor is responsive to a tampering event to initiate a vehicle shut-down sequence in the run and armed modes and the microprocessor is also responsive to a first activation of the at least one sensor to initiate the armed mode, and wherein the microprocessor is also operable in a maintenance mode and requires entry of a maintenance code to enter the maintenance mode the maintenance mode being defined as a mode during which a tampering event will not initiate the vehicle shut-down sequence and wherein the armed mode requires user input to the input system to return the microprocessor to the run mode.

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