Problem:
PCMTuner failed to read EDC17C74 on bench mode. pinout was good.
where is problem with reading?
Here are some tips:
1. Give it 13.5v power supply and you’ll be fine.
or read again several times, it should be fine.
2. Try obd module 50 virtual read.
Feedback: done it like that (vr read) and write was Ok.