Your correct in that the PCM does ground that pin to energize the relay. Note though, the PCM must see the engine pulses (crank sensor) turning to keep the ASD relay energized, if not it times out after a few seconds. So you would have to check this wire right when you key on to crank to see if the pcm is actually grounding it. That would show the PCM is grounding it so that part of the circutry is working. You grounded the wire yourself to get the fuel pump on and ASD relay energized, but if the crank sensor is not putting out a signal you would get a start-flare based off the fuel squirted in for the engine prime fuel shot, but would die right after if the PCM does not see the crank pulses to keep the injectors firing in sequence. So I would check to make sure the crank position sensor is working. You can do that by connecting a meter with a needle on it across the crank sensor and cranking the engine and seeing if you see the voltage 0-5 volts change while cranking.