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Author Topic: KWP-1281 Measuring Block Value Formulas  (Read 56122 times)
prj
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« Reply #15 on: July 02, 2024, 03:36:39 PM »

Very nice. It's easy to do when you have all the resources you need. I also made do with what I had, but I will assume yours are more accurate. Still, what is the meaning of formulas 139, 140, 141? You have commented them out, and I couldn't figure them out by giving values either.

Mine are not "more accurate", mine are exactly what VAG uses internally, dumped from their own tables.

139-141 are commented because they are probably almost never used in reality, and the translation is... annoying to say the least.
There's lookuptables and then calculations using those lookup tables.

Because I didn't see any ECU's use them I didn't bother.

If you want to implement them you will need to dump the iDEX data and test.
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domnulvlad
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« Reply #16 on: July 02, 2024, 08:06:44 PM »

Mine are not "more accurate", mine are exactly what VAG uses internally
So, by definition, more accurate than mine =)

Thank you for sharing your work.
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kartoffelpflanze
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« Reply #17 on: July 03, 2024, 04:41:08 AM »

You do not need to debug anything, all these formulas are in VAG iDEX access DB.
Opening that db can be hardly called reversing.

Here's dump of my logger class that calculates the values, labels and units.
Fuck implementing this ancient shit again and again and again.

Happy copy pasting.
Is the data from iDEX different in any way from ODIS? I found the same strings as in your TEXTTAB in ODIS, named FORMULA37.
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prj
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« Reply #18 on: July 03, 2024, 05:22:21 AM »

Is the data from iDEX different in any way from ODIS? I found the same strings as in your TEXTTAB in ODIS, named FORMULA37.

It is pretty much the same data just in a different format.
iDEX was easier for me to dump for these, so I used it.

VAS-PC also contains this data.
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