ABS Wheel sensor signal generator

[Shannen Durphey]

Chris Moore wrote:
> 
> Hi Shannen,
>   I have the GM manuals for the 1995 Seville.  It is very nice.  It
> still does not have the info that I need in it.  The wheel sensor is
> different than most.  It is internal in the wheel bearing and I cannot
> count the teeth.  How else can I get this signal?  Dealers probably
> won't have a clue.  They usually never do. 

Careful, I'm a dealership tech.

> Especially when I tell them what I am doing.  
>Is there some how I can use the bearing and just spin
> it by hand to get a signal and do some math to make sure I can make a
> generator that is set over the 18 mile/hour mark?
> Thanks
> 
If you can find a failed bearing and a press, try to take it apart. 
More work would be to measure the signal output frequency at a known
speed.  This would require a running car, a suitable DVOM, and a
sturdy set of jackstands.
Then there's trial and error with an adjustable frequency signal
generator...
Shannen
> Chris Moore
> 
> >From: Shannen Durphey <shannen at grolen.com>
> >Reply-To: diy_efi at esl.eng.ohio-state.edu
> >To: diy_efi at esl.eng.ohio-state.edu
> >Subject: Re: ABS Wheel sensor signal generator
> >Date: Sat, 03 Apr 1999 05:41:24 -0500
> >
> >This is legwork information.  There's a very good chance that the
> >exact answer won't be found on this list.
> >You can:
> >try searching the archives
> >spend time at a Cadillac dealer asking questions and looking in a
> >service manual (and being very polite)
> >order a service manual through the dealer
> >see if there's good training manuals available for that system:
> >address is below
> >
> >Easiest way is to look at axle at parts store to count # of sensor
> >teeth, and get diameter of correct size tire for car, then do math.
> >Lots of folks on this list willing to help, but buried in projects of
> >their own.
> >
> >factory training manuals:
> >MSX International
> >1425 Pacific Dr.
> >Auburn Hills, MI  48326
> >Phone (800) 393-4831
> >Fax (248)377-1510
> >
> >Shannen
> >Chris Moore wrote:
> >>
> >> Hi Everyone,
> >>   I want to say thanks for all the people who have answered some of
> my
> >> questions.  It looks like I now need some kind of signal generator to
> >> produce the same signal an ABS sensor would produce.  It looks like I
> >> need the signal to be made for 18 miles/hour or more.  How can I find
> >> this out without actually having a car to check?  Can someone give me
> an
> >> idea or maybe someone already knows. Remember, the Northstar and
> trans
> >> are from a 1995 Seville STS. Thanks.
> >>
> >> Chris Moore
> >> Get Your Private, Free Email at http://www.hotmail.com
> >
> 
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