Ok sorry if this is an obvious question but i had a good look and couldnt find anything on th site.
What pins do i cross to put the cooling system into self diagnostic mode? And does anyone have a list of error codes?

ABS uses that same Auto Tx fuse to sense when the ignition is on.

Its probably cracked the s**t because its partly got the module powered up, it can see wheels moving but thinks the engine is turned off.