Diagnostic Socket calls for PDU. There are only two people here that I know off that have the system - John6 and Veekay.
For the commoners - no joy - forget about running any test through it.
As far as your Marelli question. The engine should start and run on one bank only. Start with swapping coils and/or amplifiers, making sure the opposite site is disabled. This should tell you if you have a bad component.
The other common problem - flywheel and crankshaft position sensors. With a scope, you can read the waveforms. If any of the two is ions, engine won’t run. If they are intermittent, you’ll see it right away.
Good luck!