Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Kabushiki Kaisha Tokai Rika Denki Seisakusho

Akiyoshi Osumi

Ifushi Shimonomoto

Toshio Shimomura

Takeshi Kumazaki

Kiyokazu Ohtaki

Toru Maeda

Hisashi Kato

Koichi Masamura

Yoshinori Fukuoka

A vehicle security device for improving the security level of a vehicle. The vehicle security device is connected to an engine and communicates with a portable device. A smart ECU performs a first coded communication to establish mutual authentication with the portable device. An ID code box is connected to the smart ECU, has a first code and a second code, and does not communicate with the portable device. The ID code box performs a second coded communication using the first code to establish a second mutual authentication with the smart ECU. An engine ECU performs a third coded communication using the second code to establish a third mutual authentication with the ID code box. The engine ECU enables the engine to be started when every one of the first, second, and third mutual authentications are established.

Vehicle security device and ID code management device

Growing community of inventors

Aichi, Japan

Akiyoshi Osumi