Ford Sig. PIP TFI with CCD | trouble

[stefanst]

With "Log crank and cam" you see all edges of the raw signal - the capture edge has no effect.

James

That gets me somewhere (I think):
Since I only see very short spikes in my "Log crank and cam" signal, instead of a square wave, can I assume that I somehow screwed up my input conditioning then?

[jsmcortina]

Indeed, that doesn't look correct.

James

[stefanst]

That should have fixed it
I got tired of having to actually crank the truck, just to figure out if things are working. So I used an Arduino to simulate the PIP signal as I understand it. It showed the exact same symptoms.
Once I started playing with the pots it suddenly worked. Looks like R56 needs about 8 turns from full CCW and not 6. At least in my case. R52 fully CCW seems to be correct. With that setting I get a nice square wave and full sync with capture set to falling edge.
It will go back in the truck tomorrow and I'll report back.

[stefanst]

That fixed it indeed. Everything running smooth now. So R56 can be set up wrong and the circuit will still give a meaningful signal, but it will output short peaks where we should see nice squares....
Thanks everybody!