The iphone doesn't have the torque app... nor does it have proper bluetooth
Any way I actually made some progress, managed to connect to the ECU using NDS III Lite. It uses the Nissan consult protocol, this works perfectly, reading all sorts of sensors and switches in the Z, definitely not the prettiest app though, there is a paid version with more features and no adds.
So I suspect Nissan turned off the normal OBD protocols
Pro version of torque has consult protocol in beta, but says you need a specific consult adapter, no idea if they will support elm in the future