Marelli ignition CPS and FPS signal form

[sbobev (Steve)]

@stephan28281

I have the ROM but it seems (at least from the Supplement description) that the waveforms presented - and posted by Steve - are for models starting 1992/6 litre.

No, the screenshots I provide earlier are specifically for a 5.3L V12 with Marelli. Below are the screenshots from the 6.0L manual and the forms are the same.

and

@stephan28281

Now if I can assume that the signal forms are identical to my 1990 model year then I have definitely different results: The crank sensor generates a square wave signal similar to the one shown in the ROM for the 6 litre on page 25 (fig. 9). The flywheel sensor wave form looks on my car like a slightly distorted sine wave. I have to say, though, that I measured t

The square-wave is the the signal which the Marelli ignition ECU generates. Here:

This time, this is from the page specifically describing the 6.0L, but I saw similar figure earlier in the manual with regard to the 5.3L.