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Diagnosis 21

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Ichiro, Nov 13, 2008.

  1. Ichiro

    Ichiro Member

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    Last night, a few seconds after starting the car the MFD started to beep and act very strangely. The climate control screen popped up with the message "Diagnosis 21". I switched it to the energy screen, and "Diagnosis 21" was shown instead of the outside temperature.

    I shut down the car, waited a few seconds, and re-started... did not re-occur. Very weird... anyone else experience this before? Is it a software bug or something that I should be concerned about?
     
    #1 Ichiro, Nov 13, 2008
  2. efusco

    efusco Moderator Emeritus
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    weird, never heard of that one before.
     
    #2 efusco, Nov 13, 2008
  3. redrockprius

    redrockprius redrockprius

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    Those medical TV shows are really getting creative about ad placement, aren't they?
     
    #3 redrockprius, Nov 13, 2008
  4. rigormortis

    rigormortis Active Member

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    me neither, will check my prius stuff when i get home

    my guess until then would be a power on self test message, which wouldn't be in any prius manuals, but in some toshiba/denso manual

    theres a post i made in the knowledge base, you could check the mfd lan monitor page to see if it logged any
    ram or rom errors.

    i think the code is 01-21-110-a-b or 01-22-110-a-b
    a= unknown meaning
    b= number of times the errror occured
    01-21 01-22 rom error ram error
    110 mfd
     
    #4 rigormortis, Nov 14, 2008
  5. rigormortis

    rigormortis Active Member

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    yeah theres nothing i can find about "diagnosis 21"

    however if you do have 01-21 logged in the lan monitor screen, it means you need to
    get a new MFD
     
    #5 rigormortis, Nov 14, 2008
  6. Ichiro

    Ichiro Member

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    It happened again this morning... I snapped a couple pics with my phone:
    [​IMG]

    [​IMG]

    After I shut down and re-started the car, it went away... no problems driving and I didn't notice anything else unusual with the MFD on my drive to work.

    Rigormortis: how do I check the lan monitor log?
     
    #6 Ichiro, May 20, 2009
  7. Rokeby

    Rokeby Member

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    Could there be a connection between "Diagnosis 21," and the Maint
    Required light that is illuminated?

    What is the mileage on the car?

    Last service?
     
    #7 Rokeby, May 20, 2009
  8. Ichiro

    Ichiro Member

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    I'm overdue for 30,000 mile regular service... I'm pretty sure that the light is for that. It's been on since the odometer tripped 30K.
    I don't think I saw the maint light the first time it happened either.
    The last service was 2 months ago at 25K miles.
     
    #8 Ichiro, May 20, 2009
  9. Rokeby

    Rokeby Member

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    OK, so far so good -- that means I haven't a clue. ;)

    And the cable on the left of the top picture, a ScanGauge perhaps?

    If so, does the SG show any codes?
     
    #9 Rokeby, May 20, 2009
  10. Ichiro

    Ichiro Member

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    It's not a scangauge.. i think it's my sunglasses. Anyways, I think this has been a harmless bug (knock knock), but I'm just surprised that nobody else has heard of it or anything else like it.
     
    #10 Ichiro, May 21, 2009
  11. Rokeby

    Rokeby Member

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    I am way out of my depth here.

    Verily, you have raised an interesting question. And like the thirteenth
    strike of a clock, it begs the question, "And what about the preceding
    20 numbered diagnoses?"
     
    #11 Rokeby, May 21, 2009
  12. Ichiro

    Ichiro Member

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    it happened again! and again, no other problems, after re-starting.

    i noticed that the traction battery SoC was down to 1 or 2 purple bars at the time.
     
    #12 Ichiro, May 29, 2009
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