2002 OS 12212156 .xdf

[LRT]

Trying to use DIY tuning software is a little dangerous, unless you are an advanced user.

While I applaud the effort put forth by dzidaV8 in working on the XDF for the 12212156 OS, there are errors and omissions in the current draft version. There is no Checksum in the Transmission Calibration XDF. There is a Checksum in the Transmission Options XDF.

So depending on which of these you were using, that would explain one of the checksum issues that you experienced. The OS Checksum is very important to have in place. Sometimes a read or write will change the code ever so slightly, which requires that the checksum to be accurately recalculated.