In-vehicle system

An in-vehicle system comprising:

• 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, wherein
• 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,
• the controller includes a storage unit that stores a table in which a type of the connection target device is associated with identification information of the connection target device,
• the connection target validation process performed by the controller includes acquiring the identification information of the connection target device connected to each of the device connectors, and based on the table and the identification information stored in the storage unit, identifying the type of the connection target device connected to each of the device connectors and the position of the device connector to which the connection target device is connected,
• the identification information includes a communication ID uniquely set in advance for the connection target device and a current value of an identification current flowing to the connection target device, and
• in the connection target validation process further includes, identifying the type of the connection target device based on the table and the communication ID, and the position of the device connector to which the connection target device is connected based on the table and the current value of the identification current, or identifying the type of the connection target device identified based on the table and the communication ID after identifying the type of the connection target device and the position of the device connector to which the connection target device is connected based on the table and the current value of the identification current of the connection target device.