Wiring Help - VSS plug details
Wiring Help - VSS plug details QUESTION RESOLVED
Hey guys,
My 2001 LS1 swap into a 1989 RX7 is almost running except for one detail:
There are two wires coming from the VSS ( Vehicle Speed Sensor, Driver side T56 tranny). Can some one identify what PCM pins these wires go to. Here are the details I have:
- VSS Wire from the PCM RED 50
- VSS Low signal Wire from the PCM RED 20
- VSS High Signal Wire from the PCM RED 21
ya.... so I'm stumped... Please help, been searching like crazy with no luck
Hey guys,
My 2001 LS1 swap into a 1989 RX7 is almost running except for one detail:
There are two wires coming from the VSS ( Vehicle Speed Sensor, Driver side T56 tranny). Can some one identify what PCM pins these wires go to. Here are the details I have:
- VSS Wire from the PCM RED 50
- VSS Low signal Wire from the PCM RED 20
- VSS High Signal Wire from the PCM RED 21
ya.... so I'm stumped... Please help, been searching like crazy with no luck
Last edited by ls1_Incognito; Nov 18, 2009 at 11:31 AM.
your details are correct.
http://www.ls2.com/boggs/torques/2001pinpcm.htm
http://www.ls2.com/boggs/torques/2001pinpcm.htm
I have two wires from the sensor that need to be assigned to 1 of 3 spots on the PCM..... Which spots do they go?
OK... so here is a pic of the OEM VSS plug:
So the colors are Purple and yellow.....
RED 20 -- VSS Low signal -- has LT GRN/BLK wires
RED 21 -- VSS High signal -- has PPL/WHT wires
RED 50 -- VSS signal -- has DK GRN/WHT wires
.....damn it...... thought I had this solved
So the colors are Purple and yellow.....
RED 20 -- VSS Low signal -- has LT GRN/BLK wires
RED 21 -- VSS High signal -- has PPL/WHT wires
RED 50 -- VSS signal -- has DK GRN/WHT wires
.....damn it...... thought I had this solved
Last edited by ls1_Incognito; Nov 18, 2009 at 11:10 AM.
So I know Purple on plug to Purple on the PCM is GOOD !!!!! Now I just need to know if the yellow plug wire gos to PCM RED pin 20 or RED pin 50.
Does anyone have a LS! wire harness off the vehicle?
If so; a quick continuity test will answer my question....... Pllleeeeaaassseee
Does anyone have a LS! wire harness off the vehicle?
If so; a quick continuity test will answer my question....... Pllleeeeaaassseee
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Registered User
Joined: Jul 2010
Posts: 3
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From: SF Bay Area
Speed Sensor Issue Guys,
I'm working this problem from the other end. I have an LS7 crate engine in a Kit Car and have an engine harness with the Yellow and Purple wires that should feed a VSS sensor. My question is: will the yellow and purple wires work with an aftermarket sensor? I beleive the yellow wire is the voltage for the sensor and the purple wire is the "trigger" for the ECM. Any thoughts? This is driving me nuts!
Thanks, Chris
I'm working this problem from the other end. I have an LS7 crate engine in a Kit Car and have an engine harness with the Yellow and Purple wires that should feed a VSS sensor. My question is: will the yellow and purple wires work with an aftermarket sensor? I beleive the yellow wire is the voltage for the sensor and the purple wire is the "trigger" for the ECM. Any thoughts? This is driving me nuts!
Thanks, Chris
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Teching In
Joined: Jan 2016
Posts: 4
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Guys,
I'm working this problem from the other end. I have an LS7 crate engine in a Kit Car and have an engine harness with the Yellow and Purple wires that should feed a VSS sensor. My question is: will the yellow and purple wires work with an aftermarket sensor? I beleive the yellow wire is the voltage for the sensor and the purple wire is the "trigger" for the ECM. Any thoughts? This is driving me nuts!
Thanks, Chris
I'm working this problem from the other end. I have an LS7 crate engine in a Kit Car and have an engine harness with the Yellow and Purple wires that should feed a VSS sensor. My question is: will the yellow and purple wires work with an aftermarket sensor? I beleive the yellow wire is the voltage for the sensor and the purple wire is the "trigger" for the ECM. Any thoughts? This is driving me nuts!
Thanks, Chris
Teching In
Joined: Aug 2016
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From: Sacramento CA
TECH Addict
Joined: Aug 2005
Posts: 2,305
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From: Monroe,NY
Pin 20 and 21 are the input from the trans to the pcm. Pin 50 goes to the speedo. I have it setup on my 1992 pickup swap. You can make adjustments with pcm to get your speedo to read correctly.
Guys,
I'm working this problem from the other end. I have an LS7 crate engine in a Kit Car and have an engine harness with the Yellow and Purple wires that should feed a VSS sensor. My question is: will the yellow and purple wires work with an aftermarket sensor? I beleive the yellow wire is the voltage for the sensor and the purple wire is the "trigger" for the ECM. Any thoughts? This is driving me nuts!
Thanks, Chris
I'm working this problem from the other end. I have an LS7 crate engine in a Kit Car and have an engine harness with the Yellow and Purple wires that should feed a VSS sensor. My question is: will the yellow and purple wires work with an aftermarket sensor? I beleive the yellow wire is the voltage for the sensor and the purple wire is the "trigger" for the ECM. Any thoughts? This is driving me nuts!
Thanks, Chris
no "voltage" or "trigger" in the VSS system. The speed sensor is an AC signal generator....wiring has nothing to with operation of the system, the question is will the aftermarket sensor provide the correct signal to the pcm
