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VSS Survey: How many teeth does/do yours have? 
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Joined: Tue Jan 15, 2008 2:31 pm
Posts: 15367
Location: Home sweet home!
I need to know how many teeth your sensor(s) have, please assist and post details here.

I'm currently thinking give the ECU just one input for this, and make full 4 wheel traction control/logging an optional thing using some sort of external processing grunt. Though it may be possible to do it with a shared port for up to 8 similar inputs. I'm not sure yet.

Currently I want to get a ball park for the frequency of signal arriving and a feel for how to handle that.


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Tue Aug 28, 2012 12:30 pm
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LQFP144 - On Top Of The Game
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Joined: Thu Feb 25, 2010 3:57 am
Posts: 571
Location: Gosport, IN USA
My 1989 GM TurboHydro 700R4 Automatic transmission has 40 teeth, and in my case the sensor is a VR sensor.

FreeEMS vehicle #11, 1932 Ford 5 Window Coupe with a 1996 GM 3.1L SFI V6 with DIS ignition
FreeEMS vehicle #16, 1996 Chevrolet S10 2.2L SFI I4 with DIS ignition
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Wed Aug 29, 2012 3:12 am
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QFP80 - Contributor

Joined: Thu Oct 30, 2008 10:35 am
Posts: 62
Location: Benschop, Netherlands
Honda Civic / Integra from the 1988 - 2000 era has a single VSS sensor mounted on the differential
Sensor is a open-collector sensor, very easy to interface

The VSS signal (measured data)
At 60 km/h Freq: 42 Hz
At 100 km/h Freq: 70 Hz
At 120 km/h Freq: 84 Hz
At 170 km/h Freq: 119 Hz
duty in all case:50%


Thu Aug 30, 2012 8:12 pm
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