The ZT part of the Vin is nothing to do with a ZT
Z = Connie
T= Tourer
An NNN100692 is the early manual ECU and shouldn't be a problem both Brian and myself have service replacements in stock
There's no visible sign of the Can bus controller chip failing they just do, but that particular chip is no longer available so the only option is a service replacement ECU I'm afraid.
Russ