I've no comms now with ecu or immobiliser. Haven't got around for testing for power at the ecu yet, but I do not believe that is the problem. I think mine is a broken CAN wire somewhere.
It's just getting the time to look at it.
Had a look this morning. All ecu power and grounds seemed fine, wiring from ecu to immobiliser seemed fine, CAN at the ecu scoped out a nice clean signal...so before pulling apart the BCM enclosure, decided to try pulling the clocks out.
Did this, everything looked ok. Unplugged the connector, gave it a little clean, connected it back up and all seems to be restored to normal.
Have full comms with all modules and ecu and it's starting and running fine ( well only tried once, and haven't driven it yet ).
But it appears to be back to normal.
I always did have good comms with the dash though which is weird, only lost comms with engine ecu and immobiliser.
Went back out to start it and it's flashing again lol, no amount of messing with the clocks makes a difference, CAN signal at the clocks is good and clean.
Back to no comms with ecu and immobiliser. Although strangely the headlights also seemed to be messing about when I was working at it....perhaps there is a BCM issue of some sort causing it.
Will try another BCM tomorrow if I get a chance, although that may be futile unless it restores comms with the Immob and ECU.