An automotive sensor reads from memory previously stored back-calculated diagnostic-code values for which a fixed cyclic-redundancy-check value is valid and transmits the previously stored back-calculated diagnostic-code values read from memory each paired together with the fixed CRC value. Gaseous Cl is injected into a lower layer of Cd where CdCl2 is formed. A dispersive element disperses light within the input optical waveguides toward a plurality of output waveguides. The at least one belt-shaped body has no fixing force which fixes the plurality of mats to the at least one belt-shaped body. When a new Ethernet powered device is connected to the Ethernet power sourcing equipment, the controlling apparatus determines whether to supply electric power to the new Ethernet powered device according to its power supply priority.