Question: Can ECUHELP KT200 read/write Edc15c2 via OBD? I encountered a file saving error, and now the calculator seems to be frozen. 

Answer: Yes, you can perform the reading and writing of Edc15c2 on Bench using KT200. In full mode, add three resistances on the wires as instructed, and make sure to keep the button pressed permanently. It is important to find an original file (ORI) with the same software version and write it as directed; this process is similar to booting normally. 
it's the 120, better check them first, as the provided reading of colors is not terrible. you must have ORI because you did fap off, ecuhelpshop.com can provide you with Winols for manual checksum calculation. 
Prior to performing these steps, it is advisable to test and verify the colors for accurate readings.


For Edc15, you need to manually checksum and write the file without any risks. Use a flash blower 29f400 for the process. Rewrite the new file with the fixed checksum, and everything should work fine. The car will start without any problems.

Finally, I was able to solve the issue! I tried performing the reading and writing in boot mode, and it worked perfectly.