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2007 Prius Data Logging

Discussion in 'Gen 2 Prius Technical Discussion' started by Pilot98, Sep 20, 2023.

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  1. Pilot98

    Pilot98 New Member

    Joined:
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    Location:
    Fort Wayne IN
    Vehicle:
    2007 Prius
    Model:
    N/A
    My 2007 Prius has 150k miles, and runs at around 51 miles per gallon. Being an engineering student, I am always bothered by the fact that I could potentially improve my MPG if I had enough information to drive for optimal efficiency. I am not impressing anyone with my acceleration anyway, might as well impress them with my MPG.
    I was hoping to use an OBD2 data logger to obtain my gas mileage along with lots of other data to find the most efficient driving procedure. I would love to have massive data sets filled with many different values to analyze in Excel and MATLab.
    However, having done some reading, it appears that OBD2 data doesn't include a mpg value for Priuses. Is there any way I can obtain that data through the OBD2?
    If not, are there any other ideas? (Potential hacking of the information display or computer?) I'm sure you all have a lot more knowledge on this stuff than I do, and I would appreciate any ideas! I just really want a bunch of data I can analyze and work with!

    (Eventually, I would love to build my own cruise control that keeps the car in a state that best maximizes the fuel efficiency, during both acceleration and cruise, but that's a long way out)
     
    #1 Pilot98, Sep 20, 2023
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  2. bisco

    bisco cookie crumbler

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    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Are you sure scan gauge doesn’t do mpg?
     
    #2 bisco, Sep 20, 2023
  3. mr_guy_mann

    mr_guy_mann Senior Member

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    Vehicle:
    2006 Prius
    Model:
    Four
    I have never seen a "MPG" data pid anywhere in any ecu. You could always get a scantool with enhanced Toyota capabilities and data log info such as: RPM, vehicle speed, MAF, injection volume and time. That's probably what the car's ecu(s) use to guesstimate MPG with whatever algorithm Toyota came up with.

    Posted via the PriusChat mobile app.
     
    #3 mr_guy_mann, Sep 20, 2023
  4. ChapmanF

    ChapmanF Senior Member

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    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Doesn't have to be a PID in an ECU. The Linear Logic ScanGauge also has a bunch of computed values it can log for you. I don't often have mine on that screen, but if I remember right it remembers those per drive and per day, at least, maybe also per tank.
     
    #4 ChapmanF, Sep 20, 2023
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