Toyota Speedo Calibration
2 Feb 6 2012. Formula for Calculating Speedometer Gears.
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Toyota speedo calibration. Vehicles used to use a cable that would usually run from the tail shaft of the transmission to the speedometer. The VSS is usually not very expensive and they are not that difficult to replace. I can get it to match my GPS speed but then my odometer is off my 3 to 4 tenths which adds up.
My speed is off 2 miles an hour faster than speedo is showing. This easy-to-use Speedometer Calibrator helps you quickly and easily reprogram your vehicles speedometer to match the output of your larger tires. 16 17 18 19tooth gears and a couple of different diameters of speedometer driven gears to mate with two different speedometer drive gears 6×18 and 6×17.
On the base 2wd trucks with a tire size of 2157015 a 2357015 tire would be 25 MPH faster and a 2257515 would be 32 MPH faster. The following formula will work for any GM Ford or Chrysler vehicle and is very useful when there is no established baseline from which to work from such as replacing a transmission in a vehicle that was purchased without a drive line. I have contacted hypertech and they just keep telling me to play with it until its corrected.
With your above speedo showing 80 and using the -56 then the actual speedGPS should have been reading 75 which is much closer. Drive at a steady speed and check the speed readout on the GPS unit. 1 Press the MENU button.
Find that ratio in the table and reset the dip switches. Like Brunes said changing tires and gears will cause any error in the speedo. Ok if you have the nav manual go to pg 106 the calibration follow till you get to the calibration.
In the US last I knew there was no regulation regarding accuracy but a recommendation of – 4. Use this link to compare various tire sizes. Next disconnect the factory connector to the instrument cluster behind the dash snap in the Speedometer Calibrator Module reconnect the cluster and youre done.
1 or 2 mpg wont effect it much but for piece of mind and to make sure my gas mileage was on I just put on a Hypertech to calibrate it for my wheels. You gain access to the calibration functions by pressing the button on the front of the speedometer and holding it in while you turn on the ignition. Using the USB cable connect the In-line Speedometer Calibrator Module to your PC and enter the new tire height andor rear gear ratio.
Then pull over when safe to do so. 730103 – Speedometer Calibrators. Installing a 2657516 tire on a Prerunner with a stock tire size of 2457516 takes up for a 23 MPH difference.
As you continue to hold in the button the display will change scrolling through the three calibration methods and stopping on each one for about two seconds. Select Calibration Enter vehicle make model and year etc information to search the calibration available. 4 Select Detailed Navi.
If your Toyota Hiluxs speedometer is not working its usually going to be caused by an issue with the VSS vehicle speed sensor or a bad ECU. Your vehicles computer is designed to track the speed based on your stock tire height. Then retest to confirm the settings are accurate.
By now most reading this thread will realize that Toyota and some other manufacturers intentionally calibrate speedometers to read somewhat high. Somewhat varies by manufacturer. All of this is good in theory and tolerances can be off in so many places.
The speedometer and odometer are calibrated differently. I know that toyota made various different speedo gears that go into the insertion of the speedo cable into the transfer case. I went from a 2557018 to a 3055520.
There is no practical way to recalibrate the speedometer or odometer unless you are capable of dissecting the factory firmware that generates the ODO and Speedo readings correctly interpreting how it works and modifying it. 5 Select the desired items to be set Then. Divide the actual speed by the reading on the speedometer to come up with a recalibration ratio.
I cannot get my speedo correct with the hypertech.
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