Electronic key system for a vehicle

摘要

The present invention provides an electronic key system for a vehicle which is a type of starting the engine with pressing a button switch and can be operated at familiar mechanical movements thus easing the user or driver of an unfamiliar conception as well as improved in the operability and the protection against theft. When a quick-start switch (31) mounted on the steering wheel (39) is pressed after the code identification is valid, a CPU (24) switches on the start switch to energize a starter motor. The CPU judges from a change in the voltage of an alternator (37) that the engine starts running. As the engine runs, an ignition switch (17) is automatically turned to the II position with a valet key inserted. The engine can be stopped by the valet key (21) turning to the 0 position. In the parking state, the valet key may be detached from or accommodated in the ignition switch.