I really appreciate the reply, I did reset the unit afterwards, it was installed by pro so will have to go back (again) and ask, but I helped and am 99% sure he did the short 2 wires thing...
When it locked out @ 30mph he said it must have been the Z3 software and the fact that the z1 plug is different I was possibly out of luck ....
Question : are the maps the same as the Z3 with the imaged drive ? Someone told me his Z3 looked different on the screen than mine ?
Thanks again