pcmhacking.net

Has anyone been able to locate where the crankshaft signal is first processed in the PCM? I'd like to intercept the signal before it's processed

Which OS? I think its connected to an interrupt, you should be able to get the entry point from one of the external interrupt vectors near the start of the bin.

Are you asking for a location on the circuit board, or in the code?
It's pin 12 on the blue connector if that helps:
https://dirtysouthraceengineering.com/b ... ecu-pinout