Patent ID: 7375440

Claim:
An electronic key system for use in a vehicle having an accessory, the electronic key system comprising: an electronic key; a control unit arranged in the vehicle to perform wireless communication with the electronic key; an user operable input device arranged in one of the electronic key and the vehicle to input identification information to the electronic key; a first verification device arranged in the electronic key and operable to compare the input identification information with pre-registered identification information; a restriction information generation device arranged in the electronic key and connected to the first verification device, wherein when the input identification information matches the pre-registered identification information, operation restriction information for designating an operation of the vehicle and the accessory that is to be restricted is registerable by a user in the restriction information generation device, and wherein the restriction information generation device generates specific code corresponding to the operation restriction information registered in the electronic key, and the electronic key wirelessly outputs the specific code corresponding to the operation restriction information registered in the electronic key regardless of what person is carrying the electronic key; a second verification device arranged in the control unit and storing reference specific code, wherein the second verification device receives and compares the specific code registered in the electronic key with the reference specific code; and a restriction control device for restricting the operation designated by the operation restriction information corresponding to the specific code when the specific code matches the reference specific code.