Hi all. First, a huge thank you for all the posts and calls to my brother while I was marooned at Ningaloo.
I've only just got access to the internet so have not been able to respond sooner.
I only had intermittent communication with my brother who relayed the advice from AULRO members and my mechanic.
When it was clear I could not get her going, my Landy was towed from the beachside area, where I had munted it, to Ningaloo Station but as a cyclone was approaching and it would have been destroyed there, I had it taken to Exmouth. The local businesspeople were very, very helpful.
The local auto electrician had heaps of diagnostic gear but, even with the advice of my mechanic in Perth, he could not unlock my system. So Landy will be put on a truck back to Perth, once the cyclone passes and the roads re-open, to be hooked up to my Land Rover mechanic's equipment.
I'm really confused about the cause. I'm going to digest all the suggestions again but tried most of them, to no avail. I even ripped out my after-market immobiliser, in case this had anything to do with the problem. (Interestingly, I was told in Exmouth they fail regularly and that many serious outback 4WDers have theirs disconnected for this reason.)
My ECU was a chipped exchange unit I bought recently (and it worked brillliantly - much more power and torque, faster cruising and the same fuel consumption as before) so I got hold of my old unchipped ECU when in Exmouth and plugged it in. My mechanic said that the car would burst into life as I have not messed up my old ECU, just the new one. But it, too, did not work.
Now that I have access to a computer I'll read the posts referred to by Xtreme above in detail, then I'll take both ECUs into my mechanic to be plugged into his diagnostics.
Again thanks for all the advice and suggestions. I'll post the outcome when it's known.
Needless to say, I've learned a big lesson from this experience!
But, as Goingbush said, there's much worse places to be stuck than the beach at Ningaloo Station. It was my first trip there and it really is paradise. Just wish there hadn't been a cyclone on the way!!
I'll do the trip again later this year - anyone want to come along in case I need a tow?!