Are the first weapons, and to begin with I wanted to be able to make a "good" and the reading of the backup ecu

for this reason, the first rule that I gave myself is to always do it on the bench in boot mode or bdm depends on the ecu(in my case edc17cp49 boot mode)

then the power supply,bench that voltage give?minimum how many amps should it be?

It might be useful to read it two times and compare the two files with a program?