But this happens only when we press the pedals and the BSCU opens the normal selector valve, right?
what I understand is that at the same time, the dual valve opens as well and then the automatic selector determines which system will be pressurized.
so I think that if the pedals are unpressed, there is no normal nor alternate braking, since both valves close again. Or is it that after the "first time" the automatic selector selects the green system (first time we press the pedals with green hydraulic pressurized and NW STRG ON) it remains in that position and then we can consider green is in charge?