Vehicle Speed Signal

[maxott1]

hello people, i;ve just installed megasquirt on my m52 engine. ms needs vehicle speed signal (as m50 has vss from cluster), but i cant find that pin on my m52 siemens wiring.

this one is bosch m50. 42 pin is vss from cluster


those are m52 siemens ecu pins. none of them i think is vss




so what can i do? how to get vss for my ecu?

[johnf]

Your Siemens DME likely gets its road speed signal over pin 15, "speed signal, right rear". I reckon it should should see 25130.7 pulses per kilometer, but please confirm both these things.