IN-VEHICLE SYSTEM

An in-vehicle system includes a power supply box provided in a vehicle, and having a plurality of device connectors and a controller that supplies, to the plurality of device connectors, power received from a power supply, and a switch that switches between a cut off and a permission of power supplied to the plurality of device connectors in the power supply box. When power supplied to the device connectors is permitted by the switch, the controller performs a connection target validation process of identifying a type of a connection target device connected to each of the device connectors and a position of the device connector to which the connection target device is connected.