It is tested that ECUHELP KT200 100% read/write Edc17c50 on bench. 

However, one user feedback, KT200 Bench writing Edc17c50 and software freeze 88%, then  Boot writing and gave him error C1 (shown image as follow), how to fix it?


Possible Reason and Solution:
1. Try more voltage first, up to 13.5V is okay, 12.1V is low. 

2. Posible bad file. Try to write original back.