To answer your question I have to ask you a question.

What is your end goal here? What are you trying to do?


"Charles Lasitter" <check.sig4@ddress.com> wrote in message
news:Xns963398746425Cclncdmcom@68.1.17.6...
>A few decades ago when I worked on cars life was so simple. You had
> a speedometer cable attached to a gear in the tranny, and if the
> speedometer was wrong, you just changed the number of teeth on the
> gear until you were happy with the result. That was then ...
>
> Today I know that some cars use a Digital Ratio Adapter Controller
> (DRAC) module to take readings from a sensor, apply some multiplier
> value and then send the result on to yet another electronic brain
> assembly which uses that value and then displays your speed in your
> speedometer / odometer display.
>
> There are even web sites on how you modify them to correct your
> speedometer if it's wrong for no reason in particular, or because you
> changed your tires / wheels in some non-standard way.
>
> How does it work for Honda? What are the parts that do this
> calculation?
>
> -- CL.
>
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