Hi Mike,

>You might still have the speed returned by the ECU as it could be
>using an alternate sensor

I'm afraid not, one of the reasons I need to fix this properly rather
than just use a GPS is that the Trionic 5 ECU needs the speedo signal to
keep running smoothly, it does things like becoming prone to stalling at
junctions.

I did think about just taking GPS NMEA output and parsing that for speed
but I'm not at all sure about the legality of a speedo that won't work
in tunnels and takes a minute or two to start reading after ignition on!
... plus the whole messing with the cruise control feedback loop
possibility.

Cheers,
     Robin.





 

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