Have Volkswagen Questions? Ask an Expert Now.
It sounds to me like your issue is actually with the 30 power (battery power) and not with the ECM, since you show both the ECM and the TCM dropping out and not communicating. I would start out at the alternator cable to the battery, check connections and check your fuse panels.
No, it is pretty rare for a VW ECM to go bad (so much so that a few years they even issued a bulletin NOT to replace an ECM unless it actually stored a fault for "control module faulty".
I would check the power wire at the ECM and TCM (large red or black wire in the connector, larger than the other wires, and at one end) and also continuity to ground of the ground wire (brown wire, also large in the connector, usually right next to the power wire)