Voltage expect at the idle valve on 104.980 engine?

[StephFR]

I tested the idle valve: under 12V it open fully and its resistance is about 8 ohms.
Now I'd like to check if the ECU is sending correct information to it: what kind of voltage should I expect on it, when:

- ignition is On, engine is Off?

- engine running, engine temperature cold (just started 70 F), on average (I know it must be fluctuating)?

- engine running, engine temperature reached operating temperature, on average again?

Thanks.