Fuel Pump:
Normal: The fuel pump will work as stock.
             If you switch you key, your pump will prime and turn off again.
             After starting your car the fuel pump will turn back on(when starter signal input is active)
Always ON: you fuel pump will be on as soon as your key is ON.
                  This can be usefull to drain your fuel tank
Always OFF: your fuel pump will be always off
                    This can be usefull to free-air calibrate a wideband or messure your compression(no fuel in the cylinders)