I believe i understand the theory of the stepper valve that controls the by pass air valve.
But how does it work?
Appears to have two windings. Is one an open, the other a close winding?
Or does the ECU reverse polarity to drive the valve open and closed?
I ask because i have tried two used valves and neither seem to react to voltage input from ECU.
I'd like to know if ECU is sending correct signal to valve
Thank you
ian
Stepper? Is is a rotary actuator? A stepper motor moves one 'step' at a time, in discrete steps measured in degrees of rotation. For example, a step might be 2 degrees or 4 degrees of rotation. That would require two windings and at least four wires.
i've heard it refered to as a stepper motor. It does
have 4 wires