How to control the water of electronic water valve of BMW 525 heater?

Three-way double valve. BMW 525 warm air electronic water valve adopts three-way double valves to control water, which controls the left and right warm water inlets to control the left and right warm air respectively, and controls the opening and closing of the warm water valve according to the temperature control of the air conditioning panel. Bmw 525i drives front and rear, with a maximum speed (km/h) of 233, theoretical fuel consumption (l/100km) of 9.4 and emission standard of 2494.