I have an Ecumaster Classic, and i want to install this idle valve: bosch 0 280 140 510. Its a 2 pin, its think pwm.
So in the manual at idle valve it says i need a flyback diode for this, if i connect the idle valve to the AUX (Grey 12) pin on the ecu.
However the manual also states that a stepper motor pin (grey 2) could be used for idle valves, and the stepper motor pin has a flyback diode built in already. But It also states max 1 amp but its quite a vague sentence that they use so i am not sure.
Which one of those 2 options is the best?