Re: Speedo scaler

[Ken Kelly <kenkelly@lucent.com>]

Grumpy,
	If you are asking what it does, The VSS signal puts out 40
Pulses per driveshaft revolution. The Speedometer/odometer
expects 4004 pulses per mile. The speedo scales do this math
to get an accurate signal for the Speedo.

		Ken

PCMdoc wrote:
> 
> The actual calculations are in chips. What I did was set up a test bench with a
> fixed VSS going in, and changed each scaler as I plotted the results. This let
> me figure out how it worked.
> 
>                 Ken
> 
> nacelp wrote:
> >
> > That helps
> > Scaling is giving different weights to valves for corrections, right?.
> > Grumpy
> >
> > > Grumpy,
> > > Don't quite know what your question is.
> > >
> > > In the 8051, there are several different scale factors used with the VSS,
> > There
> > > are actually two different computers in the PCM. They have seperate
> > Scaling
> > > routines and very different ways of scaling. The Speedometer Scaling is
> > actually
> > > seperate from the scaling for all of the internal Transmission functions.
> > >
> > > Ken
> > >
> > > nacelp wrote:
> > > >
> > > > Can someone give me a clue about speedo scaler in a flask prom pcm
> > means?.
> > > > Grumpy
> > > >
> > >
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