Well I had some serious brain lock that, but yeah I realize now all my re-gears were to bring engine RPM back into the factory power band. Getting speedo correct was only a side benefit as those vehicles did not wheel sensors.
thx
4.88 gear question... How to calibrate the speedometer?
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Well I had some serious brain lock that, but yeah I realize now all my re-gears were to bring engine RPM back into the factory power band. Getting speedo correct was only a side benefit as those vehicles did not wheel sensors.
thx
wheel speed is determined by tire rpm not engine rpm. Wheel speed sensors are at te tires. Gears affect engine rpm as they are further down the chain.
Gears will change you top speed because it changes the input shaft speed at the transmission which is where the governor is. So on 4.88s you’ll be limited to something like 104mph I think. But the Speedo will still read line stock gears
Not sure specifically what you are asking, but you should not need 4.88’s with an 8 speed. The 8 speeds gearing is a lot shorter than the 6 speed. 3.91’s or, in extreme cases, 4.10’s should be plenty.
I can't find a proper wiring diagram. Can someone confirm that the abs sensor signals go straight to the ABS system ecu? From what I understand, the actual indicated speed on the dash is an average of all four abs sensor readings. Meaning, the signal is being combined at an ecu first. I assume that, as someone mentioned in another thread, that's where it's being converted into can bus messaging. Just trying to digure out if I can get away with intercepting the direct abs signals in a centralized location or at the ecu itself before it gets converted to canbus.
Hello- I know it is an old thread. But, I emailed Bryan Lutz at Lutz Auto- he is looking for an LX570/200 series to test on. I believe he is in the SoCal area. Please reach out to him if you are in the area...I would love to have one of his units sorted out for us. Automotive Part Design and Repair | Lutz Auto - https://www.lutzauto.com/
Phil
Phil
I'd buy one, if they make a speedometer correction device.
Ditto if it’s plug and play adjustment (no splicing)
Real easy to correct the speedometer, use HP tuner it will allow you to change the gearing and tire diameter. I've done it.
Not on the Lc 200 as far as I know, and definitely not on LX570. I have HPT, tuned for Harrop SC, fuel injectors, etc. Even the Tundra guys can't do it. If you have, on what platform, and can you show proof that the speedo matches GPS? Cause really that's all I want, for my speedo to be correct. Changing gearing on these doesn't matter since the speed reading is taken at the wheels, not at the transmission output shaft.
mine is 2008 LC200, and i work for me. Maybe other year may vary.
Interesting. Don't know. Mine is a 14 and initially hpt didn't have any of the PIDs to properly datalog. It took about two months for them to map it out, even though the controllers are the same for the same model year Tundra and LX570. But software zeroes and ones weren't in the same place. Everything you could log on the Tundra, I couldn't on my LX. They went through several betas and then got it working. That was over a year ago.
I notice that too, that the PID format varies from year to year after reviewing some of shared tunes. Newer model has more comprehensive tuning tables than my 2008.
1. Use HP Tuner to read your ECU data.
2. Use VCM editor to read the ECU data it created base on your stock data. Make sure you save a version beside the edited, incase you want to revert back.
3. Locate and select the "Speedo" tab
4. revise the tire dimension
5. revise the gearing if needed
6. Save and program/upload the file to your ECU.
2. Use VCM editor to read the ECU data it created base on your stock data. Make sure you save a version beside the edited, incase you want to revert back.
3. Locate and select the "Speedo" tab
4. revise the tire dimension
5. revise the gearing if needed
6. Save and program/upload the file to your ECU.
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Yeah. I tried this and it made zero difference on the cluster. The speed on the speedometer is still off. I'm 99.99% sure the cluster doesnt get its speed info from the ECU, which is what hpt is flashing. The cluster gets its speed info from the wheel sensors. Those sensors report to the abs/skid control module and then that broadcasts the data over CAN to inform other modules like the cluster to diaplay speed, tcm for shift management and ecu to assist with traction management requests. Mine is a 2014 LX though. Idk if an 08 LC is different in how it handles speedometer data.