I currently have no signals from the cam or crank on the scope.
How can I test the sensors off the engine to check that they are ok ?
What engine?
There is usually a section in an FSM for testing resistance of VR sensors, which isn’t fool proof but 95% of the time if it fails that test then replacing it works.
Otherwise taking the sensor out and waving a screw driver in front of it while doing a scope test on the EMU should tell you something. This works for Hall Effect or VR.
Better yet is a test bench with a trigger wheel spun on a motor