Re: Looking for a solution for the Subaru EG33
Posted: Thu Jul 09, 2020 9:23 am
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Looking for a solution for the Subaru EG33
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This is how IAC is connected to ECU on EJ20G. I don't think think they invented something new for EG33. Actually this is the same.
Re: Looking for a solution for the Subaru EG33
Posted: Thu Jul 09, 2020 10:23 am
I relayed what you've said to the ECU. Didn't seem to help.
Re: Looking for a solution for the Subaru EG33
Posted: Thu Jul 09, 2020 11:18 am
Verified IAC functions properly when connected to a standalone PWM controller.
Nothing with RUSefi.
Nothing with RUSefi.
Re: Looking for a solution for the Subaru EG33
Posted: Thu Jul 09, 2020 11:31 am
I will try new FW this weekend. But I can test it only on my own HW. So I'll check that nothing is broken in SW only.
Re: Looking for a solution for the Subaru EG33
Posted: Thu Jul 09, 2020 11:37 am
Re: Looking for a solution for the Subaru EG33
Posted: Thu Jul 09, 2020 12:14 pm
Ok. I'll do. Previously I did all configuration by code/defaults modification. I run TS for few times only. Time to learn new tricks.sleepingAwake wrote: ↑Thu Jul 09, 2020 11:37 amA screenshot of the idle settings in TS would be helpful if possible.
Re: Looking for a solution for the Subaru EG33
Posted: Thu Jul 09, 2020 12:18 pm
I'm also using mostly defaults. Of course I have to make some changes, like pin assignment and selecting double solenoid.Dron_Gus wrote: ↑Thu Jul 09, 2020 12:14 pmOk. I'll do. Previously I did all configuration by code/defaults modification. I run TS for few times only. Time to learn new tricks.sleepingAwake wrote: ↑Thu Jul 09, 2020 11:37 amA screenshot of the idle settings in TS would be helpful if possible.
But I haven't played around with the other Idle settings in TS. Just trying to establish basic hardware function at this point.
Regarding voltage should I be getting 3.3volts on either pin? With the PWM set at 50% I'd expect 6v connected to a 12volt source. Looking at the schematic for Frankenso 0.4 the low side drivers output 5volts. So maybe 3.3volts is what I should expect and its not enough to drive the IAC?
Re: Looking for a solution for the Subaru EG33
Posted: Thu Jul 09, 2020 12:53 pm
Low side output can output only 0V.sleepingAwake wrote: ↑Thu Jul 09, 2020 12:18 pmRegarding voltage should I be getting 3.3volts on either pin? With the PWM set at 50% I'd expect 6v connected to a 12volt source. Looking at the schematic for Frankenso 0.4 the low side drivers output 5volts. So maybe 3.3volts is what I should expect and its not enough to drive the IAC?
High level voltage depends on where other side of load is connected.These outputs are capable to drive these coils.
LEDs (D414, D419) is on?
Are you sure that you have +12V on central pin?
What voltage do you see on these two outputs while MCU in reset? You should see 12V (or 0V in some cases) but not something in the middle.
Re: Looking for a solution for the Subaru EG33
Posted: Thu Jul 09, 2020 1:52 pm
D414 and D419 are not lit up.Dron_Gus wrote: ↑Thu Jul 09, 2020 12:53 pmLow side output can output only 0V.sleepingAwake wrote: ↑Thu Jul 09, 2020 12:18 pmRegarding voltage should I be getting 3.3volts on either pin? With the PWM set at 50% I'd expect 6v connected to a 12volt source. Looking at the schematic for Frankenso 0.4 the low side drivers output 5volts. So maybe 3.3volts is what I should expect and its not enough to drive the IAC?
These outputs are capable to drive these coils.
LEDs (D414, D419) is on?
Are you sure that you have +12V on central pin?
What voltage do you see on these two outputs while MCU in reset? You should see 12V (or 0V in some cases) but not something in the middle.
The homemade oscillscope I was using isnt working correctly. Please disregard what I said about 3.3volts going to IAC pins.
I just rechecked with a proper meter and I'm getting 12v+ on either pin. Holding down reset button and still getting 12v+.
You would think I could move the valve. Makes me think its a SW or config issue now.
Re: Looking for a solution for the Subaru EG33
Posted: Fri Jul 10, 2020 12:50 pm
Is there any special settings or code that I needed to implement to get the IAC working?
Really seems like a SW issue now.
I have continuity from the IAC to the gates on the drivers and from the sense pins on the drivers to the pins on the STM32.
Solid 12v+ on the two coils at the IAC.
Really seems like a SW issue now.
I have continuity from the IAC to the gates on the drivers and from the sense pins on the drivers to the pins on the STM32.
Solid 12v+ on the two coils at the IAC.
Re: Looking for a solution for the Subaru EG33
Posted: Fri Jul 10, 2020 1:14 pm
Do we need flyback diodes here?
Re: Looking for a solution for the Subaru EG33
Posted: Fri Jul 10, 2020 1:41 pm
Am I the first to test functionality of https://github.com/rusefi/rusefi/pull/1271 and https://github.com/rusefi/rusefi/issues/1122?
Re: Looking for a solution for the Subaru EG33
Posted: Fri Jul 10, 2020 1:45 pm
Yes, no one uses this this on a real vehicle so far. I believe @Dron_Gus has tested this on a bench with fix own hardware not Frankenso.
Re: Looking for a solution for the Subaru EG33
Posted: Fri Jul 10, 2020 1:49 pm
I'm just bench testing at the moment as well. I just happen to have a spare IAC to test with.
For testing and manual % movement in TS was it just as simple as setting pin assignment and selecting Double Solenoid?
Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 5:31 pm
Do I need to implement settings in FSIO to get a PWM output? Or is this baked into the code once I choose double solenoid and set pins?sleepingAwake wrote: ↑Fri Jul 10, 2020 12:50 pmIs there any special settings or code that I needed to implement to get the IAC working?
Really seems like a SW issue now.
I have continuity from the IAC to the gates on the drivers and from the sense pins on the drivers to the pins on the STM32.
Solid 12v+ on the two coils at the IAC.
Verified my meter could pick up a PWM signal with a working standalone PWM motor control and I dont see a PWM signal at the IAC just 12v+.
Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 5:33 pm
Pretty much zero connection with FSIO.
Do you have a logic analyzer? can you get a $9 logic analyzer on eBay?
Do you have a logic analyzer? can you get a $9 logic analyzer on eBay?
Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 5:34 pm
Can you please provide any data? Can you record a video and post it on youtube of how you adjust manual idle position and how does the valve respond? what kind of power supply are you using?
Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 5:37 pm
I could post a video.
I'm using a 3s lipo to provide 12volts.
When I adjust the manual IAC slider in TS and hit burn the signal never changes and the valve never moves. Solid 12v+ and no PWM signal observed.
Only way I get it too move is with the separate PWM motor controller I have. I also observe a PWM signal using that spare controller. So I know the valve works and my meter is able to detect the PWM signal.
Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 5:43 pm
Please spell out what is 3s lipo. There is a chance that googling what is "3s lipo" is too much effort not just for me and you are making it harder to help you by adding those extra steps. I could be very wrong here.
Do we need flyback diodes here? Single-solenoid idle requires a fly back diode.
Actually can you move your IAC at least in one if you run it as single solenoid? We know that single solenoid code works for sure. If single solenoid logic would move it one way that would tell us at least something.
Unfortunately the community is too small to provide a better level of support
Do we need flyback diodes here? Single-solenoid idle requires a fly back diode.
Actually can you move your IAC at least in one if you run it as single solenoid? We know that single solenoid code works for sure. If single solenoid logic would move it one way that would tell us at least something.
Unfortunately the community is too small to provide a better level of support
Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 5:54 pm
3s lipo is 3 lithium cells in series to create an 11.1v pack. Fully charged its around 12.2volts. Can output 2-4 amps without issue.AndreyB wrote: ↑Sat Jul 11, 2020 5:43 pmPlease spell out what is 3s lipo. There is a chance that googling what is "3s lipo" is too much effort not just for me and you are making it harder to help you by adding those extra steps. I could be very wrong here.
Do we need flyback diodes here? Single-solenoid idle requires a fly back diode.
Actually can you move your IAC at least in one if you run it as single solenoid? We know that single solenoid code works for sure. If single solenoid logic would move it one way that would tell us at least something.
Unfortunately the community is too small to provide a better level of support
IDK if we need flyback diodes. I'll try what you suggested with single solenoid right now.
Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 6:02 pm
Just tried moving the IAC in Single Solenoid mode. Nothing. Not seeing a PWN signal at the IAC. Just 12v+AndreyB wrote: ↑Sat Jul 11, 2020 5:43 pmPlease spell out what is 3s lipo. There is a chance that googling what is "3s lipo" is too much effort not just for me and you are making it harder to help you by adding those extra steps. I could be very wrong here.
Do we need flyback diodes here? Single-solenoid idle requires a fly back diode.
Actually can you move your IAC at least in one if you run it as single solenoid? We know that single solenoid code works for sure. If single solenoid logic would move it one way that would tell us at least something.
Unfortunately the community is too small to provide a better level of support
I just purchased a Logic Analyzer as well.
Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 6:05 pm
Please reiterate how exactly do you check for PWM. We _know_ that single solenoid works, we _know_ that single solenoid valve required the flyback diode.
I am not very electrical so that's all help I can provide
Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 6:06 pm
Pictures, videos, napkin drawing of what wires go where.
Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 6:17 pm
Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 6:33 pm
Please note the new red note. Please enable self stimulation in "controller->ECU stimulator"
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Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 7:04 pm
Alright that was it I needed to enable self simulation.
The valve does show signs off life but goes to a fully closed position irregardless of manual IAC position changes.
The valve does show signs off life but goes to a fully closed position irregardless of manual IAC position changes.
Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 7:13 pm
Does your meter show different duty cycle or voltage according to your input?sleepingAwake wrote: ↑Sat Jul 11, 2020 7:04 pmAlright that was it I needed to enable self simulation.
The valve does show signs off life but goes to a fully closed position irregardless of manual IAC position changes.
Flyback diode time if you ask me.
Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 8:01 pm
I do see a different voltage/duty cycle with my meter now. I installed the flyback diodes this is the behavior with them in.AndreyB wrote: ↑Sat Jul 11, 2020 7:13 pmDoes your meter show different duty cycle or voltage according to your input?sleepingAwake wrote: ↑Sat Jul 11, 2020 7:04 pmAlright that was it I needed to enable self simulation.
The valve does show signs off life but goes to a fully closed position irregardless of manual IAC position changes.
Flyback diode time if you ask me.
Re: Looking for a solution for the Subaru EG33
Posted: Sat Jul 11, 2020 11:58 pm
Just for diagnostics, if you flip the two inputs, does the valve go to full open instead of full closed?
Re: Looking for a solution for the Subaru EG33
Posted: Sun Jul 12, 2020 2:30 pm
No it does not. Could it be because of the low coil resistance? 9 ohms to center tap.
I would think this valve works like a seesaw. More current on one side versus the other moves the valve open to close.
But as I move the slider the voltage observed on either coil is always matched. It changes from 448mv to 6.02v but each side measures the same. I thought I would observe low voltage on one side versus the other. An imbalance. To move the valve.
Updating this post with a screenshot from Pulseview showing the signal at PE6 and PC13 (my iac pins).