Reading the ECU and Gearbox | FerrariChat

Reading the ECU and Gearbox

Discussion in '360/430' started by tstuli, Jun 22, 2020.

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  1. tstuli

    tstuli Formula Junior

    Jun 12, 2018
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    #1 tstuli, Jun 22, 2020
    I've been playing around with some off-the-shelf low cost ELM327 based OBD tools (literally a $25 Bluetooth dongle) seeing if I could successfully connect to the some of the computers on these cars.

    I've been successful in reading and decoding what I believe to be the engine coolant temperature on the ECU (note this isn't via the standard OBD method, but rather customer parameters), and the F1 hydraulic pressure on the gearbox.

    I wanted to document some of these while I try and build out a open-source in-dash monitoring system showing me vitals on these cars for suggestions and input.

    https://gransportmaserati.wordpress.com/2020/06/22/reading-the-ecu-and-gearbox-computer/
     
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  2. brogenville

    brogenville Formula 3
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    #2 brogenville, Jun 22, 2020
    Sounds like a cool project. Are you doing this all by trial and error, or are you looking to do some com scanning of another tool to see what messages need to be sent to achieve different results?


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  3. tstuli

    tstuli Formula Junior

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    #3 tstuli, Jun 22, 2020
    Trial and error. Unfortunately these cars aren’t running CAN to the OBD port so a lot of easy recording methods are not possible.


    Sent from my iPhone using Tapatalk
     
  4. tstuli

    tstuli Formula Junior

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    #4 tstuli, Jun 23, 2020
    Last edited: Jun 23, 2020
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  5. albkid

    albkid Formula Junior

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    #5 albkid, Jun 24, 2020
    Is this a device that you plan to make available to the community?
     
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  6. tstuli

    tstuli Formula Junior

    Jun 12, 2018
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    #6 tstuli, Jun 24, 2020
    Yes! Once I get all the kinks worked out I hope to open source it so anyone can build their own.


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  7. albkid

    albkid Formula Junior

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    #7 albkid, Jun 24, 2020
    Thanks.
    This looks to be a worthwhile device for helping to gain a greater understanding of the F1 system.
     
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  8. mwstewart

    mwstewart F1 Rookie

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    #8 mwstewart, Jun 25, 2020
    Great job.
     
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  9. tstuli

    tstuli Formula Junior

    Jun 12, 2018
    374
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    #9 tstuli, Jun 28, 2020
    A little further progress today.

    I was able to get the polling rates up significantly to get several updates per second.

    I’m also now looking at monitoring/alerting. This first bit looks at how the F1 pump and system is performing.

    This uses the pump relay state to measure two things:

    1) Cycle time between pump activations. Too low of a time points to leakage/bleed off.

    2) Pump on time. How long it takes the pump to raise the pressure from 40 bar to 50 bar. Again too long of a time here indicates a weak pump or heavy leakage.

    3) Additionally I’ve added alerting to the clutch solenoid measure when they exceed 60cc/min.

    The M3Stack has a small speaker so a alarm tone can be played. Image Unavailable, Please Login


    With all these we can get some early warnings of failures or issues that need addressing.

    Any other suggestions for monitoring?


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  10. brogenville

    brogenville Formula 3
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    #10 brogenville, Jun 29, 2020
    Great bit of work this!

    Some suggestions for other alarms:
    - Gear requested vs gear selected mismatch after 1 second?
    - Any one of the solenoid currents exceeding x mA?
    - Clutch wear index exceeds X?
    - Gearbox oil temperature exceeds X degC??
    - E-diff system leak limit?

    Useful parameters to interrogate as part of pre-purchase inspection:
    - Time overheating
    - Number incorrect gear engagements
    - Number of gear engagements at high RPM.
     
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  11. tstuli

    tstuli Formula Junior

    Jun 12, 2018
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    #11 tstuli, Jun 29, 2020
    Great suggestions. I will need to look into what it would take for some of those.

    I also want to try a wider diversity of cars to try everything on. Not sure if I will be able to find vehicles locally or if folks would be able to do some remote testing with me.

    One other thing is if I end up sticking with this hardware, it also has a SD card slot for potential data logging.


    Sent from my iPhone using Tapatalk
     
  12. tres55

    tres55 F1 Rookie
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    #12 tres55, Jun 29, 2020
    Very interesting. Isn't this data generally only available to an SD2 type scanner?

    This could evolve into a lower cost alternative to the scanners that cost 10s of thousands if that is the road you're on...
     
  13. EastMemphis

    EastMemphis Formula 3
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    #13 EastMemphis, Jun 29, 2020
    Try an Autel AP200. Virtually every parameter is available as live data. $70 on Amazon. The option being discussed here seems to be a lot more than a simple scanner. It's a data logging and data monitoring device that would likely be installed in a more or less permanent fashion. Great idea!
     

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