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Hello!
I have 2004 wrx, already setting Ecumaster classic and new mil spec wiring harness
Question is, how to connecting correct 3wire IACV?
In service wiring diagram the wires is +12v, GND and signal.
I think the valve is closed position when +12v and GND are connected and then when PWM signal come from ecu its start to open.
It is correct?
Did I need flyback diode between ecu signal and +12v wire? And did I need resistor in GND wire?
Thanks in advance!