1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Spedometer bias/calibration

Discussion in '2nd Gen. Tacomas (2005-2015)' started by mgtaco, Jul 4, 2009.

  1. Jul 4, 2009 at 9:29 AM
    #1
    mgtaco

    mgtaco [OP] Member

    Joined:
    Jun 23, 2009
    Member:
    #18802
    Messages:
    15
    Gender:
    Male
    Houston TX
    Vehicle:
    09 PreRunner SR5
    Hi all,

    I don't use Gps systems a whole lot, but yesterday I did and I found that my mph gauge is consistently undershooting the speed for about 3 mph.

    Is this a measure of toyota to keep its clients away from cops:D?

    No kidding, seriously, I have the 60" wheels with the stupid dunlop tires, and I am experiencing this...

    Has anyone else noticed it?
     
  2. Jul 4, 2009 at 9:30 AM
    #2
    DanGer

    DanGer Avatar approved by 98tacomav6

    Joined:
    Jun 7, 2008
    Member:
    #7155
    Messages:
    5,494
    Gender:
    Male
    Northern Virginia & Blacksburg
    Vehicle:
    07 Base 4Cyl 4x4 Manual
    White Head Light mod, White shorty antennae, Doug Thorley Long Tube headers, AFE Drop in air filter, Secondary Air Filter Removed,
    :worthless:
     
  3. Jul 4, 2009 at 9:36 AM
    #3
    Brunes

    Brunes abides.

    Joined:
    May 31, 2008
    Member:
    #7011
    Messages:
    17,641
    Gender:
    Male
    First Name:
    Rotorhead
    DC or New Jersey - Depends on the day....
    Vehicle:
    08 Red/Graphite and Satin Black
    Inside: Tint, Wet Okole 1/2 Piped Red/Black Covers, Black Weathertech Digital Fit Mats, URD Short Throw w/ TWM Weighted Knob, USA Spec iPod adapter. Outside: 4300K Retro w/ Angel Eyes and Red Shrouds, 5000K Blazer Fog Light Retrofit, Debadge, Bed Locking Handle, Satin Black Rims Performance: TRD/Steigmeier Blower w/ 2.7 Pulley. 668 Injectors and 320 LPH AEM Fuel pump. URD UCON and 7th Injector. DTLT Headers, URD Y-Pipe, Wicked Flow Muffler. Suspension: Both: OME Shocks Front: 886X's and TC UCAs Rear: Dakars Armor: Relentless Front Bumper Relentless High Clearance Rear w/ Tire/Rotopax Swing Out Relentless Front, Mid, and TCase skids BAMF Diff Skid Recovery and Spares: Fullsize Spare Tire 2x2 gal Rotopax 1x1 gal Rotopax 1x1 gal Water Rotopax Warn 9.5XP-S Winch Hi-Lift Extreme 60" Ironman Off-Road Recovery Kit
    This topic has been discussed ad nauseum my man. There is some acceptable error in the system, based on legal/Toyota specs.

    The Odo should still rack up miles fairly correctly.
     
  4. Jul 4, 2009 at 9:38 AM
    #4
    mgtaco

    mgtaco [OP] Member

    Joined:
    Jun 23, 2009
    Member:
    #18802
    Messages:
    15
    Gender:
    Male
    Houston TX
    Vehicle:
    09 PreRunner SR5
    Not much pics needed, heres the point: Speed on the GPS = Speed on the gauge - 3 mph ;)
     
  5. Jul 4, 2009 at 9:39 AM
    #5
    mgtaco

    mgtaco [OP] Member

    Joined:
    Jun 23, 2009
    Member:
    #18802
    Messages:
    15
    Gender:
    Male
    Houston TX
    Vehicle:
    09 PreRunner SR5
    I agree, so I guess the gauge has a +/- 3mph error?
     
  6. Jul 4, 2009 at 9:48 AM
    #6
    tussery

    tussery Well-Known Member

    Joined:
    Feb 2, 2009
    Member:
    #13216
    Messages:
    150
    Gender:
    Male
    Corpus Christi, Tx
    Vehicle:
    09 PreRunner SR5
    Magnaflow muffler, TRD CAI.
    In his case (and mine) the speedometer will say he is going say 50MPH but the GPS will be saying 47MPH.
     
  7. Jul 4, 2009 at 9:50 AM
    #7
    2009tacomav6

    2009tacomav6 Well-Known Member

    Joined:
    Dec 6, 2008
    Member:
    #11323
    Messages:
    385
    Gender:
    Male
    phx AZ
    Vehicle:
    2012 4x4
    TRD SC TRD Cat Back KMC 17x9 Addicts
    I had a similar error on mine too when I bought it... I Think they do that on purpose to make you burn your warranty faster or accomidate for someone who puts larger wheels on it. I put larger wheels and tires on it and now I am tracking on taret with actual speed.. So now you have an excuse to get a lift and wheels!
     
  8. Jul 4, 2009 at 9:51 AM
    #8
    mgtaco

    mgtaco [OP] Member

    Joined:
    Jun 23, 2009
    Member:
    #18802
    Messages:
    15
    Gender:
    Male
    Houston TX
    Vehicle:
    09 PreRunner SR5


    and that's an excuse! :D:D:D
     
  9. Jul 4, 2009 at 9:57 AM
    #9
    rhion82

    rhion82 El Duderino

    Joined:
    Jun 29, 2009
    Member:
    #19084
    Messages:
    1,549
    Gender:
    Male
    First Name:
    Mitchell
    Ringgold, GA
    Vehicle:
    10 Taco w/ SOS bumper and skids, complete OME lift, and 4x sliders
    Yeah I had the same problem with the GPS but I believe its a problem with the GPS device itself not the truck.
     
To Top