NefMoto

Hi,

I hope you can help me. I set new cluster from Audi Allroad 2003 year to my Audi a6 c5 2001 year. The problem that new cluster has max speed 280 km/h but previous had 260 km/h. I changed dump to correct speed scale. But there is another problem that the cluster shows distance traveled by car large then it is. I tried to find place in dump where i can change this behavior but didn't find.

Maybe some of you knows where exactly i can change it or can point me to topic where i can read this information?

You changed the speed scale, then presumably you can correct the checksums in the dump?

I have no input as to your issue, I will have to deal with it shortly myself. The fuel economy doesn't work either does it.

Yes, i changed speed scale and recalculated checksum. So now i don have any "DEF".

Would you share how you accomplished this?

Of course.
I know several formulas to calculate checksum after speed scale changing:
1. NOT(SUM(array(0x91-0x95);array(0x9A-0xB9))) value should be placed in 0x90
2. NOT(SUM(array(0x91-0xB9))) value should be placed in 0x90
3. NOT(0xB0 + SUM(array(0xB3-0xE3))) value should be placed in 0xB2 (in this formula 0xB0 is a value, not an address)
4. NOT(0xB0 + SUM(array(0xB1-0xE3))) value should be placed in 0xB0 (address) (in this formula 0xB0 is a value, not an address)

I found this information here (http://www.audi-club.ru/forum/showpost.php?p=7169643&postcount=45) this post on Russian but you can check images to understand when each formula can be applied. By these images 3 and 4 formula can be applied to my dump but only 4 formula removed "DEF".

Also yesterday i found this solution (http://nefariousmotorsports.com/forum/index.php?topic=7964.msg72627#msg72627) i didn't try it but i hope it works.

It really works, the Instrument Cluster does all this work when you try to "recode" it.

Not in the C5 :(