Throttle Body Harness Read Out

Can you reverse all of that and see if the issue goes away?
 
Can you revert back to a stock set-up. If this change happened and now you have this problem, what ever you did most likely caused it.

Based on what you have posted here. I would find a way to revert back even if you have to go stock harness and stock ecbs for now just to confirm if that did cause the issue or not.

I am not familiar with wire tuck schematics, but I wonder if what you cut had something to do with it. Maybe. Hard to say.
 
Rokusek said:
Can you revert back to a stock set-up. If this change happened and now you have this problem, what ever you did most likely caused it.

Based on what you have posted here. I would find a way to revert back even if you have to go stock harness and stock ecbs for now just to confirm if that did cause the issue or not.

I am not familiar with wire tuck schematics, but I wonder if what you cut had something to do with it. Maybe. Hard to say.
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Dam. New emission harness and boost controller? I wasn't expecting that to be the answer. Is this my only option? Is there anything else to test before this? If I stock those 2 our and the issue is still there, what would be the next step or steps?
 
GCPhotographers said:
Dam. New emission harness and boost controller? I wasn't expecting that to be the answer. Is this my only option? Is there anything else to test before this? If I stock those 2 our and the issue is still there, what would be the next step or steps?
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Anytime an issue arrises, always revert back to a previous state when it worked and see if the action you took was actually the cause of the fault/failure. It's troubleshooting 101.

Whatever state the car was in before this issue occurred, then 100% I would revert back to that state. It is the first step in trying to diagnose the issue you are having, especially when you did something that caused the problem or created the problem.
 
Rokusek said:
Anytime an issue arrises, always revert back to a previous state when it worked and see if the action you took was actually the cause of the fault/failure. It's troubleshooting 101.

Whatever state the car was in before this issue occurred, then 100% I would revert back to that state. It is the first step in trying to diagnose the issue you are having, especially when you did something that caused the problem or created the problem.
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Thank you for your input. I understand troubleshooting 101. Right now, I know the program started when I did the MAC EBC then it was leaking. I will order one from Eric Y now as well as the OCV extension and see if these will help. It is just crazy P050A and P050B is cause by these. There have to be something else especially with the voltage drop. I know the EBC harness is non-polarized so if it was backward, it shouldn't be the issue? Is the OCV harness polarized? What module would I have burned out of it was especially? How much to ship you out here and fix everything? I just want to drive my car. It's been a year almost.
 
I can't say that either of this will fix it per say.

I hope it does fix it. I have personally never seen those codes come up before. It's just hard to diagnose without going backwards first.

Module... If anything got fried to cause this it would be the ECM. However, it could just be a bad section of harness. Grounding out. I'm not sure if the ocv is polarized. I have to redownload the genpu manuals.

I don't fly anywhere to fix anyone's car. But I can guide and help as much as I can.

I feel the want to drive your car. I got a roller 5 years ago that has a ran since 2016. It kinda runs... But ECM got fried now trying to get that fixed.

I know when the ECM goes, all sorts of weird odd shit happens.
 
Rokusek said:
I can't say that either of this will fix it per say.

I hope it does fix it. I have personally never seen those codes come up before. It's just hard to diagnose without going backwards first.

Module... If anything got fried to cause this it would be the ECM. However, it could just be a bad section of harness. Grounding out. I'm not sure if the ocv is polarized. I have to redownload the genpu manuals.

I don't fly anywhere to fix anyone's car. But I can guide and help as much as I can.

I feel the want to drive your car. I got a roller 5 years ago that has a ran since 2016. It kinda runs... But ECM got fried now trying to get that fixed.

I know when the ECM goes, all sorts of weird odd shit happens.
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Many have been saying it it is the ECU. I am trying looking to see how I can confirm that.
https://www.dropbox.com/scl/fo/bpk0...V8SxvvCI?rlkey=hxualedbegi77xewq8hiqnwwv&dl=0
How did you know it was your ECU?
 
GCPhotographers said:
Many have been saying it it is the ECU. I am trying looking to see how I can confirm that.
https://www.dropbox.com/scl/fo/bpk0...V8SxvvCI?rlkey=hxualedbegi77xewq8hiqnwwv&dl=0
How did you know it was your ECU?
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misery-tired.gif


Well, I spent the better part of 5 months metering every wire, pin module and ground on my car. Replaced every harness, repaired one harness, and replaced every sensor and relay. I knew it was probly the ECM when i started looking but refused to believe it. I was having fuel pressure issues. Basically once we realized that the AP was showing fuel rail pressure when the pressure sensor and the purge valve on the HPFP was disconnected the only possibly cause would be the ECM.
 
Also, I don't wanna say right now that it is your ECM, but it is a possibility. The Coil pack harness has to be damaged in some form to have cyl 1 and 4 dead right now. Have you done a spark test at each plug to confirm the plugs are getting power?
 
Rokusek said:
Also, I don't wanna say right now that it is your ECM, but it is a possibility. The Coil pack harness has to be damaged in some form to have cyl 1 and 4 dead right now. Have you done a spark test at each plug to confirm the plugs are getting power?
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I did...They show spark with a spark plug tester and the right balanced voltage. Just these fuse reading are off...even when I take the fuses out, the circuit voltage it off.
 

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man... after reading through this just for those two codes and knowing two cylinders aren't functioning. ECM is most logical, only once you confirm its not the harness you just changed or the EBCS are not bad or causing the problem.

EDIT: there are just too many issues all at once to not be the ECM or a harness issue
 
Rokusek said:
man... after reading through this just for those two codes and knowing two cylinders aren't functioning. ECM is most logical, only once you confirm its not the harness you just changed or the EBCS are not bad or causing the problem.
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Interestingly. I have this printed out and laminated while troubleshooting. I got to step 7-8 for the P050A code. The throttle body flap isn't open on full throttle in start...that's where the photos come into play because there is no power going to it...just ground. I wanted to replace the TB just to see if that would solve it but power not coming out the harness. I wanted to do a TB flap test but everything I research have 3-4 pin TB and we have 6. I saw that step 9 of the troubleshoot was replacing the ECU.

For P050B steps, this was more interesting but when checking the magnet on the crankshaft position sensor and camshaft position sensor, they were good long with the resistance reading. I will do another continuity test and see what happens.

Rokusek said:
EDIT: there are just too many issues all at once to not be the ECM or a harness issue
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The harness with the issues etc is the main harness (emission harness). I'm working on getting a used one on ebay (contacted 2 vendors...waiting for them to reply). I might just get a used TB as well just to eliminate everything that will point to the ECU. I will also get a new MAC EBCS. It is hard to think the ebcs went bad or was damaged.
 
Trying to find anything that specifies voltages, this is the closest I have gotten to actually answer the initial question

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I have an interesting situation and it rather the diagram is wrong or harness as I am looking in the manual and observing the same thing you shared.

01-02B-83:
Right harness
B to 2AO - no continuity
A to 2AK- no continuity
D to 2AJ- no continuity

Left harness
B to 1BF - continuity
A to 1BE - continuity
D to 1V - continuity
 
CONTROL SYSTEM [L3 WITH TC]
01-408-11

Terminal - Signal - Connected to - Test condition - Voltage (V) - Inspection item

1BE - Power supply - Main relay - Switch the ignition to off - Below 1.0 - Related wiring harness
Switch the ignition to ON - B+

1BF - Power supply - Main relay -- Switch the ignition to off - Below 1.0 - Related wiring harness
Switch the ignition to ON - B+

1V - blank (but a wire runs to it)


What is an alternate to M-MDS or does anyone have access to it. Would it be the same as using the accessport or any scanner to clear DTS?

I am in the process between the TB and ECU being an issue even though I don't have a many TB malfunction code.
 
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