[Eiska]

I have not tried it with you specific IAC version, but it has worked with other Bosch valves in the past. <shrug> For that, it would be 12V on one pin, and only the primary IAC PWM wire, with the 3rd wire to the grounded big resistor. This was popular with the old MS-1 and similar ECMs designed for 2-wire IAC operation. Best of luck if you try it.

I now tried the 50ohm resistor to ground.
It did not work.
I have asked bosch if they have a spec sheet for it will see if they respond.

[dazq]

This is what David was explaining,
See image of wiring in the resistor on this page

https://www.77e21.com/msidleair.htm

[PSIG]

@dazq, thanks for that reference. While I used references to working setups using 50 ohm pull-down, apparently the range is broader. @Eiska, be sure to verify your valve actually functions as-described earlier, before expending too much time or money trying different things. As I said, I am assuming most Bosch valves of that type are similar, but I can't know that about your valve from here.

[Eiska]

@dazq, thanks for that reference. While I used references to working setups using 50 ohm pull-down, apparently the range is broader. @Eiska, be sure to verify your valve actually functions as-described earlier, before expending too much time or money trying different things. As I said, I am assuming most Bosch valves of that type are similar, but I can't know that about your valve from here.

How do i know it functions correctly?
It is brand new but i cant find any info on it.
It is not those pipe style bosch valve.

[PSIG]

I just examine valves on the bench. Looking inside, where does the air flow? Moving the valve, how would the airflow be affected as it moves from default position to minimum and maximum? Where is the default position, and how is airflow affected in that position? ...And so on. I may even blow through it or use compressed air.

Once I can get a feel for how it works to control air, I figure-out how the motor is powered to do that. Patience. References (such as factory wiring diagrams of things that use it). Perhaps testing a functioning factory setup for what the signals or power actually does during operation by probing with an oscilloscope, etc. You need information. Find ways to find it.