Patent ID: 8095301

Claim:
An on-vehicle system comprising: a plurality of control devices, each of which stores control data that includes common data and identification information associated with the common data, the plurality of control devices including a first control device and a second control device, the first control device being configured to transmit the common data stored in the first control device to the second control device such that the common data stored in the second control device is updated; a common data match determining unit that determines whether or not the common data stored in the second control device matches with the common data stored in the first control device based on the identification information of the common data stored in each of the first and second control devices when a first update condition for updating the common data stored in the second control device is satisfied; and a common data transmission permitting unit that permits the first control device to transmit the common data stored in the first control device to the second control device when the common data match determining unit determines that the common data stored in the second control device mismatches with the common data stored in the first control device, wherein the plurality of control devices respectively have functions different from each other.