Patent ID: 7369035

Claim:
An electronic key system for a motorcycle, said electronic key system comprising: a control unit mounted to a specific vehicle; a mobile transmitter-receiver carried by a user; a control mechanism for stopping power supplied at least to a circuit system of the control unit, which performs communication, when a specific vehicle is not actuated for a predetermined period; a power supply for supplying power to the circuit system based on the turning-ON operation of a start switch; a specific vehicle comprising an openable and closable seat on which the user sits, and a locking unit for locking the seat against an opening operation until an unlock instruction is supplied; a control unit comprising: a signal generator for supplying a request signal to the mobile transmitter-receiver only after a turning-ON operation of the start switch installed in the seat; a signal detector for detecting a response signal based on the request signal transmitted from the mobile transmitter-receiver; and a control mechanism for supplying an unlock instruction to the locking unit when it is identified that a request is fed from a qualified user as a result of verification of the response signal.