U1000 error, car cranks but won't start, died while driving

[GmanMatrix]

Hi, my nv200 died while driving and now will crank but won't start. It still has full battery power.
It has multiple u1000 codes.

I've researched it and it seems like it could likely be:
loose or corroded ground on ECM
bad relay or fuse in ECM
poor electrical connection between ECM and car

I'm planning on checking these these. Does anyone have any experience with this?

[VStar650CL]

Is the engine showing up on the scan? U1000's basically mean some module is absent that should be talking, so when you see one, you're looking for an MIA. The ABS, TCM, BCM, IPDM, EPS, and Cluster all expect to hear from the ECM. If you're getting a solid security lamp (red key) and the engine isn't showing up on scan, then the ECM is offline. First thing to check is the ECM fuse, usually marked "EGI" and located in the IPDM. If there's no solid security lamp when the key is on, the ECM is online and your problem is something else.