Problem:
My PCMtuner work fine on the bench for some ECU’s and not for others. For example it read good for module 71, EDC17C46 VW caddy 2013. But when i try to read old ECU model like Mitsubishi module 31, i got a failure message. So when i test two trimnals positive wire and negative black wire by multimeter i see 2v output! not 12v, Now what i do for fixed this issue please?
Solution:
For Mitsubishi ECU like E6Txxx you cannot do, you need genuine tractrix openport j2534 with breakout cable, these ecu require 18v programming line (VPP) which pcmtuner not support.