Abstract: An image forming apparatus includes plural image holders that hold an image; plural development devices that produce an image on the plural image holders; an intermediate transfer body supported by plural support members; plural first transfer devices that transfer images that are present on the plural image holders to the intermediate transfer body; a second transfer device that transfers a composite image from the intermediate transfer body onto a recording medium; a fixing device that fixes the composite image onto the recording medium; an ejection device that ejects the recording medium having the composite image transferred thereto out of the image forming apparatus main body; and a recording medium stacking part where ejected recording media are stacked.

Abstract: An electronic control unit includes an input interface having multiplexer circuits, each of which circuits is supplied with input signals supplied from an outside of the electronic control unit, and a failsafe processing part that determines whether an abnormality occurs in the input interface by referring to a state of a specific multiplexer circuit that is at least one of the multiple multiplexer circuits when determining that an output signal of the input interface has an abnormal state and executes a failsafe process based on results of determination as to whether an abnormality occurs in the specific multiplexer circuit.