Question: Mazda CX-5 2.2 diesel 2018, 150HP …can read with PCMTuner? I don’t see any info in the instructions.
It reads via OBD. OBD does not have instructions. Find your OBD port.
And read with pcm tuner via module 10.
Also if starline alarm fitted disconnect alarm module behind dash.
If your ecu is on table and not in car, then as the tuner you will have to find correct pinouts.