Anti-vehicle-thief apparatus and code setting method of the apparatus
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United States of America Patent
Stats
-
Dec 28, 1999
Grant Date -
N/A
app pub date -
Jul 21, 1995
filing date -
Aug 2, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An anti-vehicle-thief apparatus registers specific ID codes of a plurality of keys, and determines validity of a key, for example, in accordance with an operation of the key 1 including a transponder having one of the registered specific ID codes. The anti-vehicle-thief apparatus registers a code specific to the key and confirms an operation in which an ignition switch is turned on and off five times by using the key, where this operation is for changing the ID codes specific to the plurality of keys registered in EEPROMs. After the confirmation of the operation, ID codes specific to a plurality of new keys are successively registered, thereby preventing a third person from using the old keys, as well as making registration of the ID codes specific to the new keys easily.
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