Been back to vehicle this morn

Readings as follows- Supply 12.3volts
black wire 0 volts, signal wire 0volts

Cam and crank identical, both with sensors unplugged.
With sensors plugged in, ive volt dropped earth,
Supply drops to 10.8v on scope.both on cranking.

Again cam and crank identical!!

I have been told the cam should have a bias voltage on the signal wire- by the ecu test company-hence why i sent it away for test to then be told it should be 0volts and then pulled up by the sensor.

MARK