Patent ID: 7038331

Claim:
An electronic control device for an automobile comprising newly dividing an electronic control program for the automobile into pieces of divisional electronic information when ending driving of the automobile, storing some of the pieces of divisional electronic information in an automobile operating key, storing the remaining pieces of divisional electronic information in a car-mounted electronic control unit, and uniting both divisional electronic information; the electronic control device comprises a reader for reading the divisional electronic information stored in said automobile operating key from said automobile operating key, a car-mounted writable storage unit for recording the divisional electronic information other than that stored in the automobile operating key, and an electronic information integration restoration device for restoring the control program by uniting the divisional electronic information inputted from said automobile operating key by said reader with the divisional electronic information stored in said car-mounted storage unit; wherein the automobile is driven according to the restored control program, and further comprising an electronic tally device for forming more than one of the pieces of divisional electronic information by dividing said electronic control program, and a write device capable of writing the divisional electronic information in said automobile operating key, wherein said electronic control program is divided into pieces of divisional electronic information, making said write device store at least one piece of the divisional electronic information in the key-mounted storage unit provided in the automobile operating key, and making said car-mounted storage unit store therein the remaining of the divisional electronic information.