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Speedometer inaccurate (not just the usual complaint!)

Discussion in '2nd Gen. Tacomas (2005-2015)' started by SCFirefighter, May 1, 2010.

  1. May 1, 2010 at 7:01 PM
    #1
    SCFirefighter

    SCFirefighter [OP] on idiot patrol ;)

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    My 2010 Taco, too, suffers from the often reported inaccurate speedometer. The faster I drive, the higher the inaccuracy of the needle.

    I called my dealership about this, and they told me that "if they were to measure the computer it would also show this inaccuracy. It's within tolerable levels and nothing we can do about."

    Well, this is not true. I recently received my ScanGauge and noticed that the MPH gauge is DEAD ON accurate reporting the speed of my vehicle as my GPS is, at all speeds. The speedometer needle, however, is still off.

    This leads me to believe it's something they can and should fix. Has anyone else noticed this ECM read-out as well?
     
  2. May 1, 2010 at 7:03 PM
    #2
    PreRunner

    PreRunner Well-Known Member

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    sounds like good excuse for larger tires
     
  3. May 1, 2010 at 7:06 PM
    #3
    SCFirefighter

    SCFirefighter [OP] on idiot patrol ;)

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    That's the usual remedy I've heard, but doesn't that contradict the fact that the ECM, which drives the speedometer needle, is actually accurately reporting the vehicle speed?
     
  4. May 1, 2010 at 7:07 PM
    #4
    Brunes

    Brunes abides.

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    They probably could- but they aren't going to. There is error inherent in the digital to analog conversion and if that tolerance it met- Then there isn't a problem- just something you don't like.

    If you have a GPS and a scangauge- Who cares if the speedo read correctly or not??
     
  5. May 1, 2010 at 7:10 PM
    #5
    SCFirefighter

    SCFirefighter [OP] on idiot patrol ;)

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    It's the principal of the matter. I've driven my share of cars, and moved my GPS from car to car in the past years (rentals, friends, previously owned vehicles, mine, the wife's), and I have just never seen a misrepresented needle. In 2010 that shouldn't happen to a brand new $30,000 vehicle. You're completely right: it's just something I don't like :)
     
  6. May 1, 2010 at 7:12 PM
    #6
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Moderator

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    wat?
    get 32" tires...it'll put the needle damn close and give you a slightly extended warranty :D
     
  7. May 1, 2010 at 7:14 PM
    #7
    SCFirefighter

    SCFirefighter [OP] on idiot patrol ;)

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    Thinking about new tires, but I can't afford it just now. Haven't even made the first car payment yet and sunk over $2k into the truck already lol :)
     
  8. May 1, 2010 at 7:16 PM
    #8
    Brunes

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    If the scangauge and the GPS agree on the speed and the speedo is wrong- and then you put larger tires on it and the speedo shows correctly...You'll be speeding all the time. So like 5 mph over highway speeds will really be like 10 or 11 over....
     
  9. May 1, 2010 at 7:18 PM
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    SCFirefighter

    SCFirefighter [OP] on idiot patrol ;)

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    Very true.
     
  10. May 1, 2010 at 7:18 PM
    #10
    SOSHeloPilot

    SOSHeloPilot Well-Known Member

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    .

    Mine is off almost 3 MPH at 60. ..... Think of the money saved on warranty claims at 4%+ over-mileage on OD.

    .
     
  11. May 1, 2010 at 7:22 PM
    #11
    SCFirefighter

    SCFirefighter [OP] on idiot patrol ;)

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    That thought really, really bothered me before I got my SGII, but now that's no longer a worry of mine. Since the ECM is accurately reporting the speed of the vehicle, it stands to reason it is accurately reporting the mileage displayed on the OD.
     
  12. May 1, 2010 at 7:33 PM
    #12
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Moderator

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    wat?
    from my 2 that i've had, the speedo has been off, but the ODO was dead on. now running 33s or 35s, both are off
     
  13. May 1, 2010 at 7:36 PM
    #13
    SCFirefighter

    SCFirefighter [OP] on idiot patrol ;)

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    That's exactly what Brunes posted earlier, and I suspected too. That will mess up your speed and odo readings, even though your needle might show a more accurate reading, your ECM is not.
     
  14. May 1, 2010 at 7:39 PM
    #14
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Moderator

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    wat?
    i use my HU/NAV for the accurate speedo and trip mileage anyways....the 33s put me about 2mph off and the 35s put me about 4-5 off @ cruising speeds. ODO is off about 30 miles a tank or so...maybe a tad more on the 35s
     
  15. May 1, 2010 at 7:42 PM
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    SOSHeloPilot

    SOSHeloPilot Well-Known Member

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    I am lost now ... how can the speedo be off and the odo be on target ??

    Maybe I am thinking of the cars in the old days with the spinning speedo/odo cable .. :confused:
    .
     
  16. May 1, 2010 at 7:44 PM
    #16
    SCFirefighter

    SCFirefighter [OP] on idiot patrol ;)

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    So what kind of mileage based warranty did you buy? :rolleyes:
     
  17. May 1, 2010 at 7:47 PM
    #17
    bambooshoots

    bambooshoots Be a fountain, not a drain.

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    I did it again. Got tired of paying truck payments and gas and traded in for a 2015 Honda Accord Sport since I enjoyed my 2013 Sport so much.
    What if my spedo and GPS agree and the ScanGauge is about 2-3mph slower?
     
  18. May 1, 2010 at 7:48 PM
    #18
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Moderator

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    wat?
    haha...i'm through my "36k" miles now and am out of all warranty
     
  19. May 1, 2010 at 7:49 PM
    #19
    SCFirefighter

    SCFirefighter [OP] on idiot patrol ;)

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    You're in good shape. I think you can calibrate your ScanGauge to properly display your speeds. Think of your GPS display as the true measure of your speed. Also, your odo readings will be slightly in your favor :)
     
  20. May 1, 2010 at 7:52 PM
    #20
    VooDoo

    VooDoo More Cowbell!

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    can somebody break my speedometer? :laugh:
     
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