Sid 306 eeprom crc calculation

[levisdj]

Hi, please help with eeprom crc calculation after mileage mod in dump. Never had a issue with bosch ecus but siemens seems that my tools don't support. Attached org and mod, thanks!

[fww1]

what mileage is needed, I'll try to change it in the original

[levisdj]

199018 is shown onto the odometer
Had read with Xtool 448924, 448906 and 357490

[fww1]

pass pm...............

[eliet2000]

Original = 448906 km ?
Mod = 199.018 km ?
Algoritm = CRC-16/X-25 in VIN block


55553148534441434E3435373031323131B9F2 CRC-16/X-25 in swap bit

[levisdj]

fww1, thanks for your effort, but it seems that your mod wiped out the whole eeprom.

@eliet2000 (https://www.digital-kaos.co.uk/forums/member.php/271343-eliet2000) would you be nice enough to give an example ? the values are good, but it's the other way around

[levisdj]

I'm sorry, I did a few tests with the example above, but there's a no go. Can someone help calculate the crc in eep v2 please? Thanks

[fww1]

what is the error when writing the mod?when editing eeprom control does not change

[levisdj]

Car starts and runs rough with alot of smoke! 100% crc error as I had a few megane in the past with sid307... so need correct crc calculation

[fww1]

when editing eeprom CRC does not change

[fww1]

try to record the original eeprom, see how the car behaves

[levisdj]

As stated, normal no smoke, runs as its supposed to....

[MartiLer]

I can manually calculate the checksums in the eeprom dump if this is still relevant.

[levisdj]

Yes friend, still need!

[eliet2000]

Your corrected file, regards.

[Hayssam1]

Hi, please help with eeprom crc calculation after mileage mod in dump. Never had a issue with bosch ecus but siemens seems that my tools don't support. Attached org and mod, thanks!

The file you did still doesn't match the mileage, a silence hides the original mileage 448900km

ecu 237101082R

I made you a new file, you can try it 199018 KM

[levisdj]

All good, thx and rep added. Thanks alot!

[Hayssam1]

you are welcome

[Panathaole]

i don't remember to need to fix cks in the area were the mileage is stored...... (renault nissan sid305 306...)