so when the first lobe of the phase sensor lines up with the sensor head, the crank is past TDC then yeah? ie between the TDC peg and the 90 degree peg?

Are you certain that the phase sensor signal actually gets to the ECU OK? On L6 ECU, I'm pretty sure there will be no spark if the phase sensor signal isn't present (L8 will still run without phase sensor). You say in the first post that you get right values on the multimeter - is that voltage readings when the engine is turning, or static resistance measurements? Do you have access to an oscilloscope to view signal waveforms?