I’m pretty sure my IAC is not working on my 2000 S40; idles too low, stalls without foot on accelerator, acts the same when IAC is unplugged.

Testing the IAC it get 10 ohms, seems good.
Cleaned IAC, parts all move inside. Reinstall but still not idling.

So before dropping $200 on a new IAC I check the voltage to the unit (with key off no voltage), and I get 0.5 volts. I can’t find anything that says what the voltage should be.

Is ½ a volt the right amount of juice?
Does the voltage change based on engine temp or other factors?

UPDATE: With the engine running, I got 2.3 volts. Seemed pretty stable regardless of engine RPMs. Is this the right enough of power?

Thanks for any help,
JF