Hi guys, I would like an info, I made the reading with mpps of a edc15 of a fiat stylus, I found that the file is already modified (egr closed) I came a doubt, saw mpps edc15 does not correct automatic cks, I know that the original file if you do not make changes once read can be rewritten as it is because it has no problems with cks.
The question I ask you, the edited file I just read can be rewritten as it is without cks correction ?? ie at the level of cks behaves like an original file? obviously not modifying anything
second question .............. can I take a file ori same model obviously hw and sw equal and rewrite original or risk of blocking ecu because of the cks ??
third question ................... I can take an original file on the internet and make the changes and then write it down? or do I have to work on the file I just read because of the cks ??

tranks

Its always better to work on your file you've read from your car.

then I use the modified file and I bring it original and correct the cks ... theoretically and back to the original also cks ??

If checksum is wrong, MPPS will not let you write file to ecu. From my exprecience MPPS v16 correct file checksum before writing.