Cooling Water Flow Shutting ValveEHFCVJanuary 20, 2017E/E, Powertrain Aisin Seiki Flow is shut at engine start in order to quickly warm-up the engine. Valve is designed to open by the force of cooling water flow so that the valve could stay open during power off (for fail safe). # Thermal Management Previous Post Fuel Cell Stack Manifold Next Post Multi Waterway Control Valve Leave a ReplyCancel ReplyYou must be logged in to post a comment.