The ASD relay is controlled by the PCM. The ASD relay provides 12 volts to the coils and the fuel injectors. The PCM controls the individual coils and fuel injectors by providing a ground as necessary. The PCM monitors when the ASD relay is providing power to the coils and injectors with a feedback loop. The wires providing power to the coils and injectors are colored dark green with an orange tracer. The feedback wire is also colored dark green with an orange tracer and it goes back to the PCM at pin 12 on connector 3. There is an additional component in this network of wires -- a capacitor, apparently for noise suppression for the radio.
Because the engine quit suddenly, I would suspect (based on the P1389 code) that the wire feeding back to the PCM suddenly lost power -- it was either broken, or possibly all the coils and injectors lost power at that same time (ASD relay went bad?). But on a hunch, I'm thinking the capacitor may have failed. In the old points/condenser (capacitor) ignition systems, when the condenser went bad, the coil would not provide spark. This is not the purpose of this capacitor, but the effect can be the same -- no power. I have no idea where it is located; the FSM just says on the left side of the engine. But look for a small component with a single dark green/orange wire going to it. The wiring diagram indicates it is grounded by its mounting bracket. If it failed, it may be partially grounding the coil/injector power system. Disconnect the wire, but don't let it touch any ground. Then see if the engine will start.
If the capacitor is not the problem, and the ASD relay checks out okay, you'll have to trace and troubleshoot the wires (dark green/orange) in the coil/injector power system.