I'm keen on reading the speed signal (wired, not GPS) through a custom app.

Im guessings its just a serial port or something, but any advice hould be helpful rather than trial & error

I'm keen on reading the speed signal (wired, not GPS) through a custom app.

 

I'm guessings its just a serial port or something, but any advice hould be helpful rather than trial & error

The schematic for the AV board in the F900/90BT repair manual has the speed sensor signal going through a margining network and then over to the Navi board into a Xilinx CPLD used for timing control. The schematic doesn't call out how the CPLD connects to the Titan CPU, it may be a GPIO/interrupt pin or a two-wire interface. Might still be trial-and-error territory.