No crank no com with ecu

Hello, sounds a lot like possibly an electrical system issue, driven by the battery losing state of charge. The battery must continue to be charged and steady as you operate the vehicle. This is accomplished by a functional charging system, continuing to put electricity back into the battery. If the battery can't take the charge, or the charging system fails, the various controls of the vehicle will not continue to operate. Seek guidance from a shop near you to check into this. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops