[Diy_efi] check VSS

Jim Butterfield jimbutterfield at yahoo.com
Thu Oct 7 14:49:43 GMT 2004


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I was also partially wrong... or partially right which ever you think of it... heres from a buddy that works at GM...
 
you can check a wheel sensor two ways, one is with a scanner(the best 
way), the other is have the vehicle raised, take a DVOM and and 
connect to the connectors(only has two connectors), spin the wheel, 
it will generate a signal in ohms(dosen't check for glitches, so not 
a perfect check)....VSS sensor, the only way I know is drive it with 
a scanned connected

Jim Butterfield <jimbutterfield at yahoo.com> wrote:
Yes you are kind of correct... the VSS is just like the sensor in the wheels of cars with antilock breaks... it passes in front of a tone ring that generates a block wave signal and the freq changes as the speed increasese

David Cooley <n5xmt at bellsouth.net> wrote: I wouldn't swear to it, but I *THINK* the old VSS was an ac generator...  Freq. coming into the PCM is what it used...
BTW, how are you, Dave?  I'm finally back after about 7 years...
 
 
-------Original Message-------
 
From: ronin at aristotle.net; A list for Do-It-Yourself EFI
Date: 10/06/04 20:45:27
To: A list for Do-It-Yourself EFI
Subject: [Diy_efi] check VSS

 
  How do I check a junkyard GM VSS to see if it's okay?  Can I go it
with a voltmeter?
 
  I have a pair of them from mid '80s S-10 pickups, and I'd like to know
if they work before crawling under the truck.
 
--
===ronin at aristotle.net (Dave Williams)===================DoD #978===
== waiting, anticipating / for someone to save her soul / well, I ==
== ain't no new Messiah / but I'm close enough for rock and roll! ==
========================== http://www.bacomatic.org/~dw/index.htm ==
 
 
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<DIV>I was also partially wrong... or partially right which ever you think of it... heres from a buddy that works at GM...</DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face="Courier New">you can check a wheel sensor two ways, one is with a scanner(the best <BR>way), the other is have the vehicle raised, take a DVOM and and <BR>connect to the connectors(only has two connectors), spin the wheel, <BR>it will generate a signal in ohms(dosen't check for glitches, so not <BR>a perfect check)....VSS sensor, the only way I know is drive it with <BR>a scanned connected</FONT><BR><BR><B><I>Jim Butterfield &lt;jimbutterfield at yahoo.com&gt;</I></B> wrote:</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
<DIV>Yes you are kind of correct... the VSS is just like the sensor in the wheels of cars with antilock breaks... it passes in front of a tone ring that generates a block wave signal and the freq changes as the speed increasese<BR><BR><B><I>David Cooley &lt;n5xmt at bellsouth.net&gt;</I></B> wrote: 
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
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<DIV>I wouldn't swear to it, but I *THINK*&nbsp;the old VSS was an ac generator...&nbsp; Freq. coming into the PCM is what it used...</DIV>
<DIV>BTW, how are you, Dave?&nbsp; I'm finally back after about 7 years...</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV id=IncrediOriginalMessage><I>-------Original Message-------</I></DIV>
<DIV>&nbsp;</DIV>
<DIV id=receivestrings>
<DIV dir=ltr style="FONT-SIZE: 11pt" <i><B>From:</B></I> <A href="mailto:ronin at aristotle.net">ronin at aristotle.net</A>; <A href="mailto:diy_efi at diy-efi.org">A list for Do-It-Yourself EFI</A></DIV>
<DIV dir=ltr style="FONT-SIZE: 11pt" <i><B>Date:</B></I> 10/06/04 20:45:27</DIV>
<DIV dir=ltr style="FONT-SIZE: 11pt" <i><B>To:</B></I> <A href="mailto:diy_efi at diy-efi.org">A list for Do-It-Yourself EFI</A></DIV>
<DIV dir=ltr style="FONT-SIZE: 11pt" <i><B>Subject:</B></I> [Diy_efi] check VSS</DIV></DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;&nbsp;How do I check a junkyard GM VSS to see if it's okay?&nbsp;&nbsp;Can I go it</DIV>
<DIV>with a voltmeter?</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;&nbsp;I have a pair of them from mid '80s S-10 pickups, and I'd like to know</DIV>
<DIV>if they work before crawling under the truck.</DIV>
<DIV>&nbsp;</DIV>
<DIV>--</DIV>
<DIV><A href="mailto:===ronin at aristotle.net">===ronin at aristotle.net</A> (Dave Williams)===================DoD #978===</DIV>
<DIV>== waiting, anticipating / for someone to save her soul / well, I ==</DIV>
<DIV>== ain't no new Messiah / but I'm close enough for rock and roll! ==</DIV>
<DIV>========================== <A href="http://www.bacomatic.org/~dw/index.htm">http://www.bacomatic.org/~dw/index.htm</A> ==</DIV>
<DIV>&nbsp;</DIV>
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