Well, that's odd- the ETK shows pin 83, vss, coming from the 'board computer'.
I wonder if that's where the vss signal's distributed from...
Looking at the ABS diagrams, it doesn't show any links to the ECU.
The old (obd 1 and E30) way was to have the instrument cluster process the wheelspeed
sensor in the diff, and then present a 5v square wave to the ECU. I have a 9-90 E30, and if
you DON'T interrupt the vss to the ecu, it'll limit the engine at 128 mph.
Hell, I'd just try hitting it with a 5v square wave. the old vss in the diff usually had 9
vanes or so, so you can figure out the frequency- probably anything over 5 hz would do it.
hth,
t |