Control system, mobile object, control method and computer-readable storage medium

Provided is a control system, including: a mobile object control unit configured to control a mobile object; an update control unit configured to receive an update program of the mobile object control unit from an external apparatus, and update the mobile object control unit with the update program; an instruction acquisition control unit configured to perform control to acquire a user instruction indicating that the update of the mobile object control unit with the update program is not executed; and a determination unit configured to determine whether an updatable condition is satisfied, which is a determination condition for determining the mobile object is in an updatable state or not, based on at least either of a driveline state of the mobile object or an opening or closing state of a door installed in the mobile object.