Hi Ian,
I had one in my previous R33 GTR before I took it out for Power FC (I upgraded the turbos at same time).
The ECU is locked so if you have Consult, it won't show up in screen. You can't retune it so you'd better off leave it as is or get reprogrammable aftermarket ECU such as Power FC (which you can get for 800-1000 on for sale on forums).
Cheers
Grant