Hi

I missing something on this, seems pretty straight forward to diagnose but im struggling.

Non start
Garage already fitted 3 cam sensors

Ive scoped cam sensor- no signal, live and earth all ok(In desperation ive cut live and earth and taken straight to battery)
Ive sent ecu away for test and its been confirmed as fine.
Ive scoped crank sensor- good text book signal, told by Nissan cam and crank sensors are same part no , so ive swopped position- the cam sensor in crank gives good signal, crank sensor in cam no signal
soooo im thinking mechanical, so ive removed top of engine-cam variator pick ups for cam sensor in perfect condition, air gap looks fine.
Ive even waived a spanner in front of sensor and still nothing

Everything points to sensor/mechanical fault but ive ruled it out

Any ideas??? however oddball!

regards

Mark