1. Attachments are working again! Check out this thread for more details and to report any other bugs.

DR PRIUS results

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Daniel Kutcher, Feb 27, 2022.

  1. Daniel Kutcher

    Daniel Kutcher Junior Member

    Joined:
    Aug 23, 2021
    30
    6
    0
    Location:
    Richmond, Virginia
    Vehicle:
    2013 Prius
    Model:
    Three
    Just got Dr Prius going for the first time and here’s a screen shot. Of course the green bars go up and down a lot, but they all read 15.8 so that’s good. But what’s up with the blue bar on cell #1? 24milliohm resistance seems like a small number, and the other cells are reading NO resistance at all. Thoughts?
     

    Attached Files:

    #1 Daniel Kutcher, Feb 27, 2022
  2. Daniel Kutcher

    Daniel Kutcher Junior Member

    Joined:
    Aug 23, 2021
    30
    6
    0
    Location:
    Richmond, Virginia
    Vehicle:
    2013 Prius
    Model:
    Three

    Just realized I read it wrong. All the cells are at 23 milliohms except #1, which is at 24.
     
    #2 Daniel Kutcher, Feb 27, 2022
  3. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    23,936
    15,560
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    One Dr. Prius thing I'm not wild about is the way it crops its bar charts so they don't start at zero, and that makes tiny differences between blocks look yuuge. My grade school teacher would have raked me over the coals for drawing charts that way. Bars that really showed the difference between 23 somethings and 24 somethings would look very different.
     
    #3 ChapmanF, Feb 27, 2022
    StarCaller and Daniel Kutcher like this.
  4. Daniel Kutcher

    Daniel Kutcher Junior Member

    Joined:
    Aug 23, 2021
    30
    6
    0
    Location:
    Richmond, Virginia
    Vehicle:
    2013 Prius
    Model:
    Three
    I’ve doing a bit of research now and it seems like 23 (and one 24) milliohms is like a “middle aged” value. Like they are 13 when new, and 30 and above will make dr Prius turn red with anger lol. So I guess I’m normal. 120,000 miles so far. And all the blocks have similar resistance
     
    #4 Daniel Kutcher, Feb 27, 2022
  5. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    23,936
    15,560
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    I don't think I've ever seen 13, but then I've never bought a Prius new, so maybe it serves me right.
     
    #5 ChapmanF, Feb 27, 2022
  6. Daniel Kutcher

    Daniel Kutcher Junior Member

    Joined:
    Aug 23, 2021
    30
    6
    0
    Location:
    Richmond, Virginia
    Vehicle:
    2013 Prius
    Model:
    Three
    lol
    either way, I guess that 23 is an acceptable number
     
    #6 Daniel Kutcher, Feb 27, 2022
  7. jdenenberg

    jdenenberg EE Professor

    Joined:
    Nov 21, 2005
    3,852
    1,845
    1
    Location:
    Trumbull, CT
    Vehicle:
    2020 Prius
    Model:
    LE AWD-e
    Note that the "23 milliohms" is for two Modules (12 NiMh cells) in series so that is about 12-13 milliohms per module.

    JeffD
     
    #7 jdenenberg, Feb 27, 2022
  8. PriusCamper

    PriusCamper Senior Member

    Joined:
    Mar 3, 2012
    11,091
    4,514
    0
    Location:
    Pacific Northwest, USA
    Vehicle:
    2007 Prius
    Model:
    Two
    Those aren't good measures... I will always argue that "Voltage Diff" is the best number to monitor if you want to know when your pack is going to have problems. Currently you're at 0.07v difference and that's super healthy... Once that number gets up to 0.40v on occassion that's when you need to think about doing pack maintenance/module or pack replacement.
     
    #8 PriusCamper, Feb 27, 2022
  9. Daniel Kutcher

    Daniel Kutcher Junior Member

    Joined:
    Aug 23, 2021
    30
    6
    0
    Location:
    Richmond, Virginia
    Vehicle:
    2013 Prius
    Model:
    Three
    Good point
     
    #9 Daniel Kutcher, Feb 28, 2022
  10. Daniel Kutcher

    Daniel Kutcher Junior Member

    Joined:
    Aug 23, 2021
    30
    6
    0
    Location:
    Richmond, Virginia
    Vehicle:
    2013 Prius
    Model:
    Three
    Good to know! I’ve seen it fluctuate as high at 0.20v on occasion.
     
    #10 Daniel Kutcher, Feb 28, 2022
(You must log in or sign up to post here.)