Oh, Tony, Not Again!!
TT
If you remember back to when I got more than a little obsessed about this issue, I wrote a post about how to test all the connections to and from the ASC connector, to eliminate whether the wires were running without breaks round the car. I described how you could check the valves directly from the ASC connector to a) test if there was a break in any of the wiring or in the coil inside each valve and b) to power them up to make sure you hear the little click as they operate. I think I even recorded the impedences to expect for each of the ten or so valves in the pump unit.
Its all there in that post, together with the reference to the correct wiring diagrams to use - yours and mine are identical and whatever diagram I mentioned is the same as yours. I'll have a trawl (don't have time just now as have to go and do a night flight in a mo!) but let us know if you can locate it in the meantime.
The bad news I have for you is that when my ASC Unit was playing up, it was saying code 34, even after I had replaced the unit that you now have with my recon one - so I know that that valve is fine on your unit. If its not the wires, you know where this leads back again, dont you? But, look on the bright side, even if its the computer, BBJ-Reman will fix it and warrant it for 2 years like mine.