you can feed a 7730 a square wave VSS signal, just need to move the VSS input wire to a different pin and change a flag. AFAIK, every mask run on the 7730 supports the "optical" VSS input.
Sounds easy enough. Anyone know what pin is for the square wave input?
So I got this straight.
1. Repin the VSS input to ??
2. Re-jumper the drac for my proper multiplier.
3. Change my bin to use the square wave input "optical" at 4000ppm.
Correct?
Thanks!
Yes. Pin C6. Set up the DRAC to produce 2000 pulse per mile. Clear the "magnetic VSS present" bit 6 @ 0x0018. The speed sensor pulse per mile divider will no longer be used.
Awesome, Thanks! So once that "magnetic VSS present" is cleared, the "Road Speed Constant" at 0x15 is irrelevant? Or does it need to be set to 2000ppm as done here:
http://www.gearhead-efi.com/Fuel-Inj...-on-a-7730-ECM
Last edited by misterpat; 05-13-2017 at 02:27 AM.
The RSS affects the signal sent from the ecm to the instrument cluster.
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