Method of and system for entering identification codes into vehicle antitheft system
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
In a vehicle antitheft system having an immobilizer unit which reads in an identification code generated by and transmitted from an ignition key of the type having a built-in signal transmitter, an ID code of a first ignition key is tentatively stored in the immobilizer unit until different ID codes of first and second ignition keys are registered even in the event where ID code entry operation is interrupted before registration of the first and second keys'"'"' ID codes during an entry of the first ignition key ID code and is resumed with the second ignition key.
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Citations
15 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. 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 a memory 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, said vehicle antitheft system comprising:
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mode shifting means for shifting said vehicle antitheft system to a code alteration mode in which said second codes in said memory are altered when said code verifying means reads in two said first codes different from each other having a specified relationship with respect to said second codes in said memory, and to a code registration mode in which first codes are registered in said memory; 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 said two first codes in said memory when said tentative memory means becomes ready for storage of said two first codes.
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10. A method of entering codes in 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 code entry method comprising the steps of:
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shifting said vehicle antitheft system to a code registration mode in which said second codes are registered in said memory means; tentatively storing said first codes transmitted from said signal transmitter in order in tentative memory means in said code registration mode; and determining whether said tentative memory means is ready for storage of at least two said first codes different from each other; and registering said two first codes in said memory means when said tentative memory means is determined to be ready for storage of said two first codes. - View Dependent Claims (11, 12, 13, 14)
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15. A method of entering codes in 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 code entry method comprising the steps of:
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shifting said vehicle antitheft system to a code registration mode in which said second codes are registered in said memory means; tentatively storing said first codes transmitted from said signal transmitter in order in tentative memory means in said code registration mode; and determining whether said tentative memory means is ready for storage of two said first codes different from each other; and registering said two first codes in said memory means when said tentative memory means is determined to be ready for storage of said two first codes.
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Specification