Control system for vehicle

A control system for a vehicle that has a motive power source mounted thereon and has the motive power source enabled by wireless communication between a portable device and an on-vehicle communication device to operate, the control system controlling a state of power supply from a power source to the motive power source and an on-vehicle electric device according to the switching of a power source position of a power source position-switching device by an occupant, comprising:

• power source position-detecting means for detecting the power source position;
• and
• control means for controlling electric power from the power source such that the electric power is supplied to the on-vehicle electric device, when the detected power source position is in an accessory position in which the electric power from the power source is to be supplied to the on-vehicle electric device,
• wherein in a case where a predetermined communication state between the on-vehicle communication device and the portable device is established in which the portable device is estimated to be in a compartment of the vehicle after a state in which the power source position is in the accessory position has continued for a first predetermined time period, said control means stops power supply from the power source to the on-vehicle electric device when a second predetermined time period elapses after a time at which the predetermined communication state is established.