Hello all
Since support has help me for my ECM E77, i can now flash it with some parameters. One is speedometer calibration. Exactly, VSS Pulse.
But, when i change the value, and flash ECM, speedometer don't change. The problem is that i have 10km/h of difference between GPS and speedometer.
Do you know why ?
thank you
Francois
Post your stock file & the most recent file so we can take a look.
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
I don't have a stock file because only write is available now. the only file i got is the one support send me. Here you will find it attached.
And the file you wrote to the pcm with the speedo items changed?
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
I have tried to change VSS Pulse from 25.000 to 20.000, 21.000, 22.000, 23000 and that's all. And no effect. I only changed this parameter.
Might be as simple as an issue with you using decimals instead of comma's, try setting your regional settings to english as this could be the key to getting the results you desire.
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
I tried to change value with no comma as 25000 as valuated the first time but no effect. So i don't use comma.
I assume you've changed tire height which is the reason you are looking to modify this constant?
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
No. Since i have this car i have a difference between real speed and speedometer. When i connect an odb scanner the speed is good.
So i think it s a problem inside the speedometer and DIC because the speed is the same between them. So i want to correct it.
Talked to the engineer who did the definition work for this application, he believes the speedo controls might be found in the tcm which we do not currently support(T68) and not the pcm. He added a tire height table to the newest 2.24 build posted a few minutes ago for you to try out but he's pretty sure its probably something in the tcm thats controlling the speedo.
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
Yes. I think so. Thank you for your help. I will try it as soon as possible.
I downloaded the last build. I checked also the regional setting and you right. In French, there is a space "25 000" in VSS Pulse parameter. In English USA, there is a comma "25,000" and a comma in the gear ratio. So i have 2 parameters to test this week. I'll give you news soon.
Thank you again
Last edited by 2008SRX; 01-23-2014 at 03:55 PM.
Hi
Since i changed regional setting, it have no effect on speedometer. So as you wrote, i think there is a TCM who control the Speedometer and DIC. But when i connect my odb scanner, the speed is accuracy with a GPS. I'm going to find a method to calibrate the speedometer so if someone know it, i will be very glad to read you.
Any way, Bill, no news to read entire ECU ?
Thank you
Regards
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