Issue with M102 IAC

Sergei

I installed the whole kit on the car but faced with the problem of idle not working, when you start the engine goes into emergency mode and holds 1300 rpm, if I disconnect the IDLE wire and return to the standard ECU everything works, also I checked the voltage on the IDLE wire and it is always 6.5v when the ignition is on. In the manual the connection of this wire is signed as an option, maybe I need to activate it in the settings? What other information do I need to solve this problem?

JHM

If stock idle regulator is working fine - why don't you leave it as is.
If you still want to use Invent regulator - search for connection mistakes. Maybe you cut the wrong wire.

Sergei

At the moment I left the idle speed work from ECU, but I wanted to connect everything to invent for more control. About the connection error, I cut the cable which is number 3, I checked it with a multimeter and if I do not connect it back to the ECU again the revs are 1300, so the cable is definitely responsible for the idle. I'm wondering why the voltage on the idle cable does not change from "invent" even when I select manual idle in the settings and change the settings to 50 or 100 percent.
Of course I can leave it like that and drive, but please understand and help me, because it just annoys me when something is not done right. 😉

JHM

3-wire valve cannot be controlled directly. External circuit is needed:

Sergei

My idle sensor has two contacts, I want to connect it to "invent" to be able to manually adjust it, for now I will leave it running from the ECU. But for the future I would like to understand what my mistake is, I have this question: If I put the manual idle settings in "commander" should change the voltage on the idle cable that comes out of the block "invent"?
Thx!

JHM

IDLE output is low-side switch with PWM. Manual slider is changing duty cycle of PWM output. You can see it with the oscilloscope.

Sergei

I see, as I said before, my idle has a contact on two wires, if I leave it running through the ECU the idle is around 850-900 rpm and does not decrease, I want to achieve a reading of 750-780 rpm. When I connect the idle to "Invent" the rpm is 1300 and the settings in the program have no effect, I do not understand how to solve this problem. So I want to say that I am not an auto mechanic and maybe I made a mistake somewhere, but I connected the wires strictly according to the instructions. Can you help me if I provide logs ? I also ordered a new idle valve from China. With it the situation is even worse, even with the connection to the standard ECU revolutions are very high, also 1400-1500. Also with any of the idle valve when I accelerate on the spot the car reacts to the gas pedal very unevenly and it is hard to hold the revs in one place.
Thank you for your understanding and help!

Sergei

Also I forgot to mention . if I disconnect the crankcase vent hose and shut it off the rpms go down a little bit. about 50. But I'd like to keep the stock venting system.

JHM

You shouldn't block stock vent system.

If valve is not reacting to the Manual slider of Idle settings, then it is probably not connected properly.
Idle valve has 2 wires:

12v supply (measures at 12V when valve is disconnected)
control wire (no voltage if valve is disconnected)

You should cut the Control wire from the stock ECU and connect it to the IDLE wire of Invent ECU