HOW TO DO AN ADVANCED SEARCH.
Mon Jul 08, 2013 3:56 pm by Admin
For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.
When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).
After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …
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How to wire the VSS into the GM PCM
+2
Hotrodz of Dallas
Jasonscottw
6 posters
944Hybrids: 924/944/968 and 928 V8 Conversions :: Technical Stuff (other than motors) :: Electrical Mods
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How to wire the VSS into the GM PCM
So I have TPC's VSS kit installed, but I'm perplexed as to how to wire it into the PCM- which pin/port, and if there is a plug that I need to wire into those pins to mate up with the plug on the kit- thanks
Jasonscottw- Posts : 125
Join date : 2013-10-17
Re: How to wire the VSS into the GM PCM
Jasonscottw wrote:So I have TPC's VSS kit installed, but I'm perplexed as to how to wire it into the PCM- which pin/port, and if there is a plug that I need to wire into those pins to mate up with the plug on the kit- thanks
What ecu and engine wire harness do you have? I can look and see what wires you need to attach to.
Hotrodz of Dallas- Posts : 615
Join date : 2015-10-31
Age : 65
Location : Dallas-Ft. Worth
Re: How to wire the VSS into the GM PCM
Dear Jasonscottw,
Here is the Pinout for the VSS.
99 Camaro 5.7 Engine
Function-----Pin-----Circuit No. PCM Termination
VSS LO-------A------822------------C2-20
VSS HI-------B-------821-----------C2-21
99 Corvette 5.7 Engine
Function-----Pin-----Circuit No. PCM Termination
VSS LO-------A------401------------C2-20
VSS HI-------B-------400-----------C2-21
99 GMC Sierra 1500 5.3 Engine
Function-----Pin-----Circuit No. PCM Termination
VSS LO-------A------822------------C2-20
VSS HI-------B-------821-----------C2-21
Here is the Pinout for the VSS.
99 Camaro 5.7 Engine
Function-----Pin-----Circuit No. PCM Termination
VSS LO-------A------822------------C2-20
VSS HI-------B-------821-----------C2-21
99 Corvette 5.7 Engine
Function-----Pin-----Circuit No. PCM Termination
VSS LO-------A------401------------C2-20
VSS HI-------B-------400-----------C2-21
99 GMC Sierra 1500 5.3 Engine
Function-----Pin-----Circuit No. PCM Termination
VSS LO-------A------822------------C2-20
VSS HI-------B-------821-----------C2-21
Punisher948- Posts : 39
Join date : 2012-07-19
Age : 56
Location : Flint, MI
Re: How to wire the VSS into the GM PCM
Thank you!
Hotrodz, that would be awesome if you could confirm that info:
The computer:
Serv. No. 12586243
Hdw. No. 12583659
In researching the computer numbers I gather it may be from a later year express van, or a CTS??
Originally I thought it was from a 99 truck, but . . .
I hired a guy to do the final wiring cuz I had to go overseas for a bit- he didn't work out (at all) so now I'm trying to sort out his work, and also my work from a couple years ago
And, any idea which wire coming off the VSS is high/lo?
Really appreciate the help-
Hotrodz, that would be awesome if you could confirm that info:
The computer:
Serv. No. 12586243
Hdw. No. 12583659
In researching the computer numbers I gather it may be from a later year express van, or a CTS??
Originally I thought it was from a 99 truck, but . . .
I hired a guy to do the final wiring cuz I had to go overseas for a bit- he didn't work out (at all) so now I'm trying to sort out his work, and also my work from a couple years ago
And, any idea which wire coming off the VSS is high/lo?
Really appreciate the help-
Jasonscottw- Posts : 125
Join date : 2013-10-17
Re: How to wire the VSS into the GM PCM
http://www.lt1swap.com/2004gto_pcm_pinouts.htm
That pinout might help you figure things out...
"2004: Serv. No. 12586243 with Hwd. No. 12583659 - Mostly GTO and Express vans got this PCM, as well as Caddy CTS-V. MIGHT be in trucks"
That pinout might help you figure things out...
"2004: Serv. No. 12586243 with Hwd. No. 12583659 - Mostly GTO and Express vans got this PCM, as well as Caddy CTS-V. MIGHT be in trucks"
spence- Posts : 684
Join date : 2009-07-21
Age : 41
Location : St.Catharines, Ontario, Canada
Re: How to wire the VSS into the GM PCM
Thanks! Looks like I have a mismatched PCM/HARNESS . . .
Question:
The VSS harness/plug has two wires, but I have three options on the PCM:
-VSS low (pin 20)
-VSS hi (pin 21)
and
-VSS output (pin 50)
What do I do? And yes, I advanced searched this forum and the big 3 LS forums, and the only suggestion I found was to ignore the VSS hi, which doesn't make sense-
Also I'm unsure of what the VSS output would even do/function?
Thanks . . .
Question:
The VSS harness/plug has two wires, but I have three options on the PCM:
-VSS low (pin 20)
-VSS hi (pin 21)
and
-VSS output (pin 50)
What do I do? And yes, I advanced searched this forum and the big 3 LS forums, and the only suggestion I found was to ignore the VSS hi, which doesn't make sense-
Also I'm unsure of what the VSS output would even do/function?
Thanks . . .
Jasonscottw- Posts : 125
Join date : 2013-10-17
Re: How to wire the VSS into the GM PCM
never used the kit, but looking at a pic of one it has a yellow and black wire on the sensor. yellow would be high, black would be low. the vss output on the pcm is exactly that, a vehicle speed sensor output signal, it could be used to run an electronic speedo in some applications.
sharkey- Posts : 713
Join date : 2014-11-21
Age : 39
Location : Abbotsford BC
Re: How to wire the VSS into the GM PCM
The VSS output goes to the dash of the Camaro/Vette. The hi/lo go to the sensor but I don't know if polarity on the sensor matters.
Rich
Rich
Rich L.- Posts : 928
Join date : 2011-05-30
Location : Seattle
Re: How to wire the VSS into the GM PCM
Thanks all- now I just gotta re-pin 20 and 21.
For some reason the PCM is devoid of inputs at those locations-
For some reason the PCM is devoid of inputs at those locations-
Jasonscottw- Posts : 125
Join date : 2013-10-17
944Hybrids: 924/944/968 and 928 V8 Conversions :: Technical Stuff (other than motors) :: Electrical Mods
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