Inventors:
Takayuki Hiramitsu - Aichi, JP
Kiyokazu Ohtaki - Aichi, JP
Tomohiro Ohmura - Aichi, JP
Toshiki Akita - Aichi, JP
Teruya Tomiyasu - Toyota, JP
Noriyasu Onishi - Aichi-ken, JP
Manabu Mizutani - Ann Arbor MI, US
Assignee:
Kabushiki Kaisha Tokai Rika Denki Seisakusho - Aichi
International Classification:
G05B 23/00
G08B 29/00
G06F 7/04
US Classification:
307 101, 307 102, 340 51, 340 524, 340 532, 340 561
Abstract:
A controller for an electronic key system including a portable device and an engine. When the ID code of the portable device cannot be authenticated, the controller instructs the driver of the necessary operations. When a transmitter circuit is transmitting a request signal but a receiver circuit does not receive a signal including an ID code matching the ID code stored in a memory, an authentication ECU authenticates a transponder code of the portable device with a stored transponder code to enable the starting of the engine. The authentication ECU displays the necessary operations for performing transponder code authentication.