Patent ID: 8719611

Claim:
A vehicle-mounted multimedia apparatus having at least one functional module which is powered from a power source to operate and an interface to which an extension device is to be connected, wherein functional module identifying means for identifying a functional module provided in the extension device if the extension device is newly connected to the interface; determining means for determining whether before the extension device is connected said vehicle-mounted multimedia apparatus has a functional module (referred to as a corresponding functional module) which corresponds to a functional module in the identified extension device; and means for stopping powering the corresponding functional module and performing powering of the functional module provided in the extension device if it is determined by the determining means that said vehicle-mounted multimedia apparatus has the corresponding functional module, wherein the functional module identifying means identifies the functional module provided in the extension device based on an extension device functional module ID which is obtained from the extension device newly connected to the interface, said extension device functional module ID being stored in a storing par of the extension device newly connected to the interface and representing the functional module provided in the extension device.