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Method of and system for entering identification codes into vehicle antitheft system

  • US 5,949,152 A
  • Filed: 08/08/1997
  • Issued: 09/07/1999
  • Est. Priority Date: 08/08/1996
  • Status: Expired due to Term
First Claim
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1. A vehicle antitheft system which comprises an ignition key of a type having a built-in signal transmitter for transmitting a first code assigned to the ignition key as a code signal and code verifying means for reading in said first code of an ignition key of said type upon operation of said ignition key, comparing said first code read therein with a plurality of second codes registered in memory means and transmitting an engine actuation command to engine controlling means so as to permit said engine controlling means to perform control of operation of the engine when there is a specified relationship between said first code and any one of said second codes in said memory means, said vehicle antitheft system comprising:

  • mode shifting means for shifting said vehicle antitheft system to a code alteration mode in which said second codes in said memory means are permitted to be altered when said code verifying means reads in at least two said first codes different from each other having a specified relationship with respect to said second codes in said memory means, and to a code registration mode in which said second codes are registered in said memory means;

    tentative memory means for tentatively storing said first code transmitted from said signal transmitter in said code registration mode; and

    registration control means for controlling storage of at least two said first codes in said memory means when said tentative memory means becomes ready for storage of said at least two first codes.

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