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Vag-Com to check LTFTs (long term fuel trims) and other things.Keep close track of how your car is performing after each tune revision. Again, use the NefMoto ECU Flashing Software. Writing/flashing your tuned file back to the ECU is the same as the reading process above. MTX-electronics sells an affordable TunerPro plugin that will correct checksums for ME7. More info about checksums: Andy Whittaker's site. A lot of guys carry around a spare known working ECU as insurance. Or worse, it may start once or twice and catch the invalid checksum and leave you stranded.
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If these checksums are incorrect the car will not start. Your ECU file has several internal checksums that need to be updated when the file is altered. Read the tuning guide and the Nefmoto tuning subforum. You will need knowledge of which maps perform what tasks and what data should be changed. Many are works in progress if you find an error please let the author know. There are several XDFs posted in the Nefmoto Definition File subforum. This tells TunerPro where the various maps and relevant data are in the file. TunerPro will need a definition file (.XDF) for the ECU file you want to edit. To change your ECU tune will require map editing software. In this case or if something goes wrong and you can no longer connect using NefMoto, you will need to have a Galletto 1260 Flashing Cable to hopefully rescue the ECU in boot mode (a lower level protocol). If you already have an aftermarket tune from a commercial tuner, it is likley that they will have disabled the ability to read using this method. It is the easiest and best supported method.
#Ecu map editor software free
To read your car's stock file from the ECU you can use Tony's free NefMoto ECU Flashing Software.