Patent ID: 7394350

Claim:
An on-vehicle controller comprising: smart control means for transmitting a transmission request signal from an on-vehicle transmitter to a predetermined area and for receiving a return signal, which is transmitted by a portable device receiving the transmission request signal, with an on-vehicle receiver, wherein the smart control means controls an on-vehicle device based on the received return signal; security control means including a security sensor for providing a warning if the security control means detects improper conduct to a vehicle; immobilizer control means for performing radio communication with the portable device and for reading an identification code for certifying permission for an engine start from the portable device based on the read identification code, wherein the immobilizer control means permits the engine start if the read identification code coincides with a stored identification code; and a mode switch, which is switchable between on and off positions to switch an operation mode of the on-vehicle controller between a normal mode, in which all of the smart control means, the security control means and the immobilizer control means operate, and a power-saving mode, in which only the immobilizer control means operates.