06 GTO LS2 Stand-Alone Harness Not Matching GM Schematics
#1
On The Tree
Thread Starter
06 GTO LS2 Stand-Alone Harness Not Matching GM Schematics
I have a Current Performance harness that I modified to allow the harness to fit the engine compartment and other relocated components. Just to be sure everything was correct before applying power I went through the ECM and other component pinouts.
I found some wire colors not matching the pinout charts, no biggie, but a few of the pinout functions didn't match the GM schematics. It's not possible to re-assign functions of the ECM, is it? I'm quite sure the correct sensor plugs are connected to the ECM as originally supplied before it was modified.
The engine was run before the mods were done, although I believe the Check Light was on and it would sometimes backfire while cranking. Once started it seemed to run great.
Any ideas?
Larry
I found some wire colors not matching the pinout charts, no biggie, but a few of the pinout functions didn't match the GM schematics. It's not possible to re-assign functions of the ECM, is it? I'm quite sure the correct sensor plugs are connected to the ECM as originally supplied before it was modified.
The engine was run before the mods were done, although I believe the Check Light was on and it would sometimes backfire while cranking. Once started it seemed to run great.
Any ideas?
Larry
#2
On The Tree
Thread Starter
Update
Here are two pinouts that do not match the diagrams:
Actual Harness pinout: ECM C2, pin 54, #1 coil, purple.
Diagram pinout: ECM C2, pin 54, EVAP Canister Vent Solenoid Control.
Actual Harness pinout: ECM C2, pin 44, Cam Pos sensor, red.
Diagram pinout: ECM C2, pin 44, Low Coolant Level, white/black.
Just for the record, I found two wires in the diagram reversed on the #2 and #7 coils compared to the other coils and my harness. Pins B and C.
And, a couple instances where the circuit number is different on the ECM connector page and the corresponding sensor page.
I'm not so sure how far I can trust the diagrams now!
Actual Harness pinout: ECM C2, pin 54, #1 coil, purple.
Diagram pinout: ECM C2, pin 54, EVAP Canister Vent Solenoid Control.
Actual Harness pinout: ECM C2, pin 44, Cam Pos sensor, red.
Diagram pinout: ECM C2, pin 44, Low Coolant Level, white/black.
Just for the record, I found two wires in the diagram reversed on the #2 and #7 coils compared to the other coils and my harness. Pins B and C.
And, a couple instances where the circuit number is different on the ECM connector page and the corresponding sensor page.
I'm not so sure how far I can trust the diagrams now!
#4
On The Tree
Thread Starter
As a matter of fact, I did. Here's his response:
"The actual harness pinouts are correct. There are several errors in the GTO factory service manuals."
I would have to agree with him especially by basing it on another clue: Because the pin the diagrams say is the EVAP, not the #1 coil like my harness has, there should be another pin elsewhere in the diagrams for the #1 coil. There isn't!
Now, if I could find what pin the low coolant level sensor is actually located on someone else's harness, that would verify this pin discrepancy.
"The actual harness pinouts are correct. There are several errors in the GTO factory service manuals."
I would have to agree with him especially by basing it on another clue: Because the pin the diagrams say is the EVAP, not the #1 coil like my harness has, there should be another pin elsewhere in the diagrams for the #1 coil. There isn't!
Now, if I could find what pin the low coolant level sensor is actually located on someone else's harness, that would verify this pin discrepancy.
#5
TECH Resident
iTrader: (1)
As a matter of fact, I did. Here's his response:
"The actual harness pinouts are correct. There are several errors in the GTO factory service manuals."
I would have to agree with him especially by basing it on another clue: Because the pin the diagrams say is the EVAP, not the #1 coil like my harness has, there should be another pin elsewhere in the diagrams for the #1 coil. There isn't!
Now, if I could find what pin the low coolant level sensor is actually located on someone else's harness, that would verify this pin discrepancy.
"The actual harness pinouts are correct. There are several errors in the GTO factory service manuals."
I would have to agree with him especially by basing it on another clue: Because the pin the diagrams say is the EVAP, not the #1 coil like my harness has, there should be another pin elsewhere in the diagrams for the #1 coil. There isn't!
Now, if I could find what pin the low coolant level sensor is actually located on someone else's harness, that would verify this pin discrepancy.
Tipsy
#6
On The Tree
Thread Starter
Here are a couple pages:
Check out pin #44 on the ECM C2 connector. It says it's for the Low Coolant Level; it's the Cam Position Sensor on the actual harness.
Pin #54 shows EVAP Vent Solenoid; #1 coil on the harness.
And, the #2 Coil: pins B and C functions are reversed. Same with #7.
Check out pin #44 on the ECM C2 connector. It says it's for the Low Coolant Level; it's the Cam Position Sensor on the actual harness.
Pin #54 shows EVAP Vent Solenoid; #1 coil on the harness.
And, the #2 Coil: pins B and C functions are reversed. Same with #7.
Last edited by 69-er; 03-21-2015 at 09:35 AM.
#7
TECH Resident
iTrader: (1)
Here are a couple pages:
Check out pin #44 on the ECM C2 connector. It says it's for the Low Coolant Level; it's the Cam Position Sensor on the actual harness.
Pin #54 shows EVAP Vent Solenoid; #1 coil on the harness.
And, the #2 Coil: pins B and C functions are reversed. Same with #7.
Check out pin #44 on the ECM C2 connector. It says it's for the Low Coolant Level; it's the Cam Position Sensor on the actual harness.
Pin #54 shows EVAP Vent Solenoid; #1 coil on the harness.
And, the #2 Coil: pins B and C functions are reversed. Same with #7.
Tipsy
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#8
TECH Resident
iTrader: (1)
We've verified that GTO C2 Pin# 54 is in fact Ignition Coil #1 and NOT EVAP Vent Solenoid Control. So the question is, what connector/Pin# is GTO EVAP Vent Solenoid Control?
On the SSR pinout, EVAP Vent Solenoid Control is C1 Pin #54. The GTO pinout shows C1 Pin# 54 as "Not Used." Based on the SSR pinout information, it stands to reason that GTO C1 Pin# 54 should be EVAP Vent Solenoid Control.
Can anyone verify this?
Tipsy
On the SSR pinout, EVAP Vent Solenoid Control is C1 Pin #54. The GTO pinout shows C1 Pin# 54 as "Not Used." Based on the SSR pinout information, it stands to reason that GTO C1 Pin# 54 should be EVAP Vent Solenoid Control.
Can anyone verify this?
Tipsy
#13
TECH Resident
iTrader: (1)
Thanks Ted, but that info isn't specific enough (C1, C2, C3 pinouts needed) and the first attachment doesn't have any of the EVAP components.
At this point I just want to verify whether the GTO's harness has the EVAP Vent Control Solenoid on C1 54.
With AKNovaman's help, we verified the errors that the OP raises:
GTO Pinouts as published with corrections noted
C1 Pin 54 Not Used (unverified - could this be EVAP Canister Vent Solenoid Control, as it is in the SSR/TBSS pinout?)
C2 Pin 44 (WH/BK) Low Coolant Level Signal (Incorrect! C2 Pin 44 is verified as Cam Position Sensor)
C2 Pin 50 (GN/YE) EVAP Canister Purge Solenoid Control
C2 Pin 54 (WH) EVAP Canister Vent Solenoid Control (Incorrect! C2 Pin 54 is verified as Ignition Coil #1)
SSR Pinouts as Published (all SSR information is assumed to be correct)
C1 Pin 54 (WH) EVAP Canister Vent Solenoid Control
C2 Pin 44 (RD) Cam Position Sensor
C2 Pin 50 (D-GN/WH) EVAP Canister Purge Solenoid Control
C2 Pin 54 (PU) Ignition Coil #1
The other verified errors in the GTO Alldata info is the designation of pin B&C in the Coil #2 & Coil #7 connector, as the OP indicates.
Tipsy
Last edited by TipsyMcStagger; 04-01-2015 at 06:44 AM.
#16
On The Tree
Thread Starter
Speaking of colors, the errors between my harness and the diagrams are even more numerous!
Now, since this harness came from Current Performance I don't know if it's a modified factory harness or scratch-built by them. I don't think they would change the colors...
Now, since this harness came from Current Performance I don't know if it's a modified factory harness or scratch-built by them. I don't think they would change the colors...
#18
One more way would be to "ohm" the wire(s) and see which pin they go to on the E38 ECM. I had to do that with my 2007 Escalade harness when I was re-working it. There were some wires that I did not have a clue as to what they were for.
#20
LS1Tech Sponsor
iTrader: (3)
This forum is so helpful!
Those guys got the discrepancies lined out for you.
We use the Corvette diagrams and color coding on our LS2 E40 harnesses. There are a few reasons for this, one of the reasons being the discrepancies.
Bill
Those guys got the discrepancies lined out for you.
We use the Corvette diagrams and color coding on our LS2 E40 harnesses. There are a few reasons for this, one of the reasons being the discrepancies.
Bill
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