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Outside Temperature Display Anomolies

Discussion in 'Gen 2 Prius Main Forum' started by prev93, Dec 21, 2004.

  1. prev93

    prev93 Member

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    Now that the temps for those of us in the Northeast have dropped dramatically, I have been looking at my outside temperature display more than usual. What I have noticed is that when the temp hovers around 37-39F, the display will show 39, then go immediately to 37, skipping 38. If the temps then go lower, it will then display only EVEN numbers down to 10(which is the lowest I have see so far). I can't remember whether it displayed odd numbers above 40; it may be awhile before I can check that. I don't know whether the sender is malfunctioning or whether the software is incapable of resolving temperature readings less than 2 degress. Anyone else notice this kind of odd behavior in their outside air temp display?
     
    #1 prev93, Dec 21, 2004
  2. DanMan32

    DanMan32 Senior Member

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    Yup, I noticed it too. Think I saw a post or two about this a LONG time ago. I believe it is reading celcius to the degree, then converting to farenheit.
     
    #2 DanMan32, Dec 21, 2004
  3. paprius4030

    paprius4030 My first Prius

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    If that snowfalke goes on I try NOT to look at the temp. It's too depressing !!!!
     
    #3 paprius4030, Dec 21, 2004
  4. Tempus

    Tempus Senior Member

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    I haven't paid that much attention, but I think I have your odd numbers. I know I saw 17 and 19 yesterday morning and 25, 27 and 29 on the way to work this morning.
     
    #4 Tempus, Dec 21, 2004
  5. jimbo

    jimbo New Member

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    I too have seen odd numbers.
    37, 36, 35, ... finally winding up at 33 the last I looked.
    Those numbers mean winter is here.
    But no snow yet in Chicago.
    :roll:
     
    #5 jimbo, Dec 21, 2004
  6. jimofdg

    jimofdg New Member

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    I agree with the original poster. In the Chicago area, I can confirm the even numbers (F.) in the 10 to 18-degree range. The conversion math theory makes sense.

    During actual Prius travel (as a passenger), I did notice that all temperatures (all integers) will display eventually, but the display tends to change in increments of 2 degrees F.
     
    #6 jimofdg, Dec 21, 2004
  7. DanMan32

    DanMan32 Senior Member

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    1-9 odd increments
    10-18 even increments
    19-27 odd
    28-36 even
    37-45 odd
    46-54 even
    55-63 odd
    64-72 even
    73-81 odd
    82-90 even

    Found this by taking each C degree from -17 through 32, multiplying by 1.8 and adding 32, then rounding off.
     
    #7 DanMan32, Dec 22, 2004
  8. prev93

    prev93 Member

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    Amazing! I think you have proved your theory regarding conversion of temperature data to Fahrenheit from Celsius. I just wonder why they didn't program the display with Fahrenheit, since they have made so many accommodations to the American market anyway.
     
    #8 prev93, Dec 22, 2004
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