Mazda Motor Corporation

Naldec Corporation

Sharp Corporation

Manabu Hirozawa

Atsushi Okamitsu

Kazufumi Adachi

Hiroshi Tagawa

Tsukasa Harada

Norifumi Kanada

Kiyoshi Kumata

Hiroshi Shobun

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.

Anti-vehicle-thief apparatus and code setting method of the apparatus

Growing community of inventors

Hiroshima, Japan

Manabu Hirozawa