CONTROL APPARATUS, PROGRAM UPDATING METHOD, AND COMPUTER PROGRAM

Provided is a control apparatus configured to control updating of a control program of an on-vehicle control device that controls a target device installed in a vehicle including a plurality of power supplies. The control apparatus includes: a detection unit configured to detect states of the plurality of power supplies that supply power to the target device; and a determination unit configured to determine that updating of the control program is possible, when the states of the plurality of power supplies detected by the detection unit indicate that at least two of the plurality of power supplies are able to output power required for updating the control program.