I'm sure there are a lot more vehicles out there we can figure this out on. List of vehicles where this info is stored in 726-18-01 List of vehicles where this info is stored in 726-45-01: List of vehicles where this info is stored in 726-12-01: However, older vehicles store this data in a different location in the BCM and the year it changes isn't consistent for all Ford vehicles. Now, as I mentioned this data is stored at 726-12-01 xxxx 0000 xx for the current model year cars that I've looked at. I came up with a spreadsheet to do these calculations for you which is here. And if your speedometer is still off, you can measure it against an accurate source like GPS, and use that to refine your value even further. Compare that to the factory as-built for my car which is 0858 - pretty close, off by a whole 2 millimeters.Īs you would imagine, armed with these formulas you can program any tire size, not just ones that came as factory options on your car. Multiply that by the conversion factor of 96.7% and you get 2134mm rounded off.
The formula to figure the nominal circumference of that tire size is (( 275 * 40 * 0.02) + ( 19 * 25.4) ) * Pi which gets you 2207mm rounded off. So for example, let's take the rear tire on my 2017 Mustang GT with Performance Pack. I found that 2016 and earlier Fusions seemed to use a conversion factor of 97.7%. This conversion factor also seems to work for newer Explorers and F150s, and 2017+ Fusions. If youve ever modified a car with smaller or larger tires or, perhaps, a different final-drive gear, youve immediately screwed up your speedometer.This is, of course, annoying, but for modern. I did most of my initial research on 2016-2017 Mustangs, and on those cars it was very close to 96.7% of the nominal tire circumference. What this conversion factor is can vary depending on year.
If you convert the hex to decimal, what you get is the circumference of the rear tire in millimeters - but with some sort of revs/mile conversion factor applied. In all of the current model year cars I've looked at (Explorer, Fusion, Mustang, F150) the tire size is stored in the second four-digit hex block of 726-12-01 as follows:
2002 f250 speedometer calibration ford ids how to#
Kit includes USB cable and software CD.I've worked out how to program any tire size you want in the BCM, which enables you go get a very accurate speedometer reading even if you have oversized non-factory tires. Recalibrates for ANY tire size and/or rear gear ratio. Next, simply disconnect the factory connector to the instrument cluster (behind the dash), snap in the Speedometer Calibrator Module, reconnect the cluster, and you¹re done! In a matter of minutes, you can accurately correct your speedometer and odometer readings (as required by law). There are no limitations to tire height or rear gear ratios.
2002 f250 speedometer calibration ford ids Pc#
Installation Is A Snap! Using the USB cable connect the in-line Speedometer Calibrator Module to your PC and enter the new tire height and/or rear gear ratio. This module is perfect for vehicles with computers that don’t allow for tire size and/or rear gear ratio correction or want to re-calibrate for sizes outside the range of programmers. Hypertech’s in-Line Speedometer Calibrator Module is an in-line module to correct the speedometer and odometer for unlimited tires sizes and/or rear gear ratios.
0 kommentar(er)
