12-15-2017, 05:00 AM
Doc, thanks for the better description of the iacv pulses, that makes more sense now.
q3: on shutdown, either with key or stop/run the iacv remains in it's current position, when i switched it off there was just a single blip of the led's indicating it had no time or inclination to close with any command, when it is switched off its instantly dead in the water.
The ignition key switches the dashboard, which has it's own micro controller and translates the signals for the instruments.
The start/stop supplies the Engine Control Module, fuel pump and ignition system and initiates ( resets ) the iacv and ecm every time it's powered on.
So when you hear the fuel pump pressurize cycle the ecm and iacv reset as well and the iacv positions itself according to the engine temp at the time.
Also, when the engine is switched off when warm the iacv remains in the "warm" position, should you disconnect it and start the engine it is likely to start around 1050 rpm ( speculation ) but you get the etc code as well.
q4 no, it remains in the position at switchoff.
There is another video which resembles our iacv and shows what is likely inside it, if you forward to 7.5 minutes in the video he shows the parts on the table and the rotor with a special magnetic "flux sheet" to show how the poles are positioned on the rotor, if you look closely you can see the two sets of stators with their poles that wrap around the two coils that power them.
https://www.youtube.com/watch?v=QIHhDGLx9Lg
cheers max
q3: on shutdown, either with key or stop/run the iacv remains in it's current position, when i switched it off there was just a single blip of the led's indicating it had no time or inclination to close with any command, when it is switched off its instantly dead in the water.
The ignition key switches the dashboard, which has it's own micro controller and translates the signals for the instruments.
The start/stop supplies the Engine Control Module, fuel pump and ignition system and initiates ( resets ) the iacv and ecm every time it's powered on.
So when you hear the fuel pump pressurize cycle the ecm and iacv reset as well and the iacv positions itself according to the engine temp at the time.
Also, when the engine is switched off when warm the iacv remains in the "warm" position, should you disconnect it and start the engine it is likely to start around 1050 rpm ( speculation ) but you get the etc code as well.
q4 no, it remains in the position at switchoff.
There is another video which resembles our iacv and shows what is likely inside it, if you forward to 7.5 minutes in the video he shows the parts on the table and the rotor with a special magnetic "flux sheet" to show how the poles are positioned on the rotor, if you look closely you can see the two sets of stators with their poles that wrap around the two coils that power them.
https://www.youtube.com/watch?v=QIHhDGLx9Lg
cheers max