Help Troubleshooting PSE Retrofit
Track Day
Joined: Apr 2024
Posts: 16
Likes: 7
Hard to check, but do you know if they ran the automatic coding of all modules after coding the XLF (point 11.5.1 and 11.5.2 in the instruction manual)?
But at first I would recheck the correct vacuum lines, as you mentioned.
But at first I would recheck the correct vacuum lines, as you mentioned.
Thread Starter
Intermediate
Joined: Apr 2021
Posts: 28
Likes: 21
From: Rancho Cucamonga
Might try and find someone near me with PIWIS.
4th Gear
Joined: Apr 2024
Posts: 3
Likes: 0
From: GTA
Hey @rth.photo, I know the thread is a few months old now but hope you might remember: when you say that a section of one of the harnesses was being pinched, do you recall where exactly and what harness? I'm not sure if you meant that the wire that gets run as part of the retrofit kit got pinched.
Basically I'm having the same issue, where the changeover valve is not getting 12v. To test, I pulled the wire from the end that goes under the driver's seat and energized it directly with 12v from a power supply, and the changeover valve activates when I apply 12v. It seems like it's only not getting power when it's plugged into the BCM under the driver's seat. At this point I'm not sure if it's a coding issue, or I need to be checking anything else. I've also checked all the fuses that power the BCM and they are all good (and power other functions as well, so would be noticeable if a fuse was out).
Basically I'm having the same issue, where the changeover valve is not getting 12v. To test, I pulled the wire from the end that goes under the driver's seat and energized it directly with 12v from a power supply, and the changeover valve activates when I apply 12v. It seems like it's only not getting power when it's plugged into the BCM under the driver's seat. At this point I'm not sure if it's a coding issue, or I need to be checking anything else. I've also checked all the fuses that power the BCM and they are all good (and power other functions as well, so would be noticeable if a fuse was out).
Track Day
Joined: Jun 2021
Posts: 17
Likes: 2
Hey @rth.photo, I know the thread is a few months old now but hope you might remember: when you say that a section of one of the harnesses was being pinched, do you recall where exactly and what harness? I'm not sure if you meant that the wire that gets run as part of the retrofit kit got pinched.
Basically I'm having the same issue, where the changeover valve is not getting 12v. To test, I pulled the wire from the end that goes under the driver's seat and energized it directly with 12v from a power supply, and the changeover valve activates when I apply 12v. It seems like it's only not getting power when it's plugged into the BCM under the driver's seat. At this point I'm not sure if it's a coding issue, or I need to be checking anything else. I've also checked all the fuses that power the BCM and they are all good (and power other functions as well, so would be noticeable if a fuse was out).
Basically I'm having the same issue, where the changeover valve is not getting 12v. To test, I pulled the wire from the end that goes under the driver's seat and energized it directly with 12v from a power supply, and the changeover valve activates when I apply 12v. It seems like it's only not getting power when it's plugged into the BCM under the driver's seat. At this point I'm not sure if it's a coding issue, or I need to be checking anything else. I've also checked all the fuses that power the BCM and they are all good (and power other functions as well, so would be noticeable if a fuse was out).
4th Gear
Joined: Apr 2024
Posts: 3
Likes: 0
From: GTA
hey @Oz981S , I was hesitant to share this because I really cannot explain why this would make any difference.. but, yes, an indie was able to resolve the issue.
Completely unrelated, I took my car in to get the motor mount changed. You have to drain the coolant to do so, and then after changing out the mount and refilling my coolant, the indie was getting a vacuum error. They bled and burped the system multiple times and couldn't find a problem, so they checked my vacuum lines and found one that was cracked.
After replacing the cracked vacuum line, the vacuum error went away and my PSE valves started working perfectly. The indie didn't even notice it, I just noticed it started to work on my drive back home.
Again, no idea how closely related the two are, but on that particular visit to my indie, they didn't touch the coding at all or my wiring at all. On previous troubleshooting, we had the wires exposed on both the BCM and the rear fuse box ends and energized them directly, and nothing. If you are already that far into your own troubleshooting/that confident the wiring is fine, then might be worth looking into this far-fetched theory?
Best of luck!
Completely unrelated, I took my car in to get the motor mount changed. You have to drain the coolant to do so, and then after changing out the mount and refilling my coolant, the indie was getting a vacuum error. They bled and burped the system multiple times and couldn't find a problem, so they checked my vacuum lines and found one that was cracked.
After replacing the cracked vacuum line, the vacuum error went away and my PSE valves started working perfectly. The indie didn't even notice it, I just noticed it started to work on my drive back home.
Again, no idea how closely related the two are, but on that particular visit to my indie, they didn't touch the coding at all or my wiring at all. On previous troubleshooting, we had the wires exposed on both the BCM and the rear fuse box ends and energized them directly, and nothing. If you are already that far into your own troubleshooting/that confident the wiring is fine, then might be worth looking into this far-fetched theory?
Best of luck!
Track Day
Joined: Jun 2021
Posts: 17
Likes: 2
hey @Oz981S , I was hesitant to share this because I really cannot explain why this would make any difference.. but, yes, an indie was able to resolve the issue.
Completely unrelated, I took my car in to get the motor mount changed. You have to drain the coolant to do so, and then after changing out the mount and refilling my coolant, the indie was getting a vacuum error. They bled and burped the system multiple times and couldn't find a problem, so they checked my vacuum lines and found one that was cracked.
After replacing the cracked vacuum line, the vacuum error went away and my PSE valves started working perfectly. The indie didn't even notice it, I just noticed it started to work on my drive back home.
Again, no idea how closely related the two are, but on that particular visit to my indie, they didn't touch the coding at all or my wiring at all. On previous troubleshooting, we had the wires exposed on both the BCM and the rear fuse box ends and energized them directly, and nothing. If you are already that far into your own troubleshooting/that confident the wiring is fine, then might be worth looking into this far-fetched theory?
Best of luck!
Completely unrelated, I took my car in to get the motor mount changed. You have to drain the coolant to do so, and then after changing out the mount and refilling my coolant, the indie was getting a vacuum error. They bled and burped the system multiple times and couldn't find a problem, so they checked my vacuum lines and found one that was cracked.
After replacing the cracked vacuum line, the vacuum error went away and my PSE valves started working perfectly. The indie didn't even notice it, I just noticed it started to work on my drive back home.
Again, no idea how closely related the two are, but on that particular visit to my indie, they didn't touch the coding at all or my wiring at all. On previous troubleshooting, we had the wires exposed on both the BCM and the rear fuse box ends and energized them directly, and nothing. If you are already that far into your own troubleshooting/that confident the wiring is fine, then might be worth looking into this far-fetched theory?
Best of luck!
I believe I had checked everything but I was wrong. It was a coding issue using Thinkdiag tool. Missing configure under "Rear-end electronics" which another user suggested yesterday. I have a small drone with PSE and wife really hates it so very happy it has been fixed.
Last edited by Oz981S; May 16, 2025 at 10:30 PM.
