Abstract: A submergence backup circuit includes a submergence detection portion having a submergence detection portion for detecting a submergence state. The submergence backup circuit is configured so that a window is controlled to be opened when a manual window operating switch is operated into an opening side but the window is controlled to be not closed when the manual window operating switch is operated into a closing side.

Abstract: A submergence detection portion 21 is provided in a circuit substrate, or the like, which carries electronic circuits of a power window control portion. The submergence detection portion 21 is configured to have an elliptical hole portion 25 provided in the circuit substrate so as to be immersed in water in case of submergence of a vehicle, and electrically conductive patterns 26 and 27 provided in the circuit substrate so as to be opposite to each other with respect to the hole portion 25. End portions of the electrically conductive patterns 26 and 27 near to the hole portion 25 are formed as electrically conductive pads 26a and 27a made of electrically conductive portions exposed. When the hole portion 25 is filled with water in case of submergence, the electrically conductive patterns 26 and 27 are electrically connected to each other.