I've worked on DS4's before yet never encountered something exactly like this. I have to say it's a pretty weird issue. Here's what could be going on:
The analog sticks are independent of the cable sheet on the DS4's, Hence my initial thought would be that something has gone wrong with the main microcontroller onboard the controller and somehow an association has been created between the left analog and R2, someone mentioned something similiar in the xbox thread you mentioned.
Now IF this were the case, essentially repair is not feasible unless you have a replacement microcontroller and the skills to replace it successfully, BUT I highly doubt that this is indeed the case as I've never encountered a similar sceneario when working on DS4's
What I think more likely is the case is that the cable sheet got damaged when you were cleaning it, those things are ridiculously fragile and I've had multiple go bad in weird ways while trying to clean them. Since you said that before cleaning the sheet the controller was behaving differently and no association existed between left analog and R2 I believe that further proves my theory. The movement of the analog stick might be physically compressing the sheet in a way which causes right trigger to press down..
So, now what?
Well one way to confirm this theory is to disassemble the controller and completely take the sheet out and reassemble the controller, of course no buttons will actually work now apart from the analog sticks since those are soldered on the motherboard. So in theory by doing so, if the sheet was causing the issue, then the left analog should no longer be effecting the R2. If that is the case, go ahead and buy a replacement sheet (I believe it's called a membrane which is the proper term, if you want to find a replacement that is the keyword you should use.).
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If this isn't the case the unfortunately the microcontroller is probably the issue making it infeasible to fix.
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If this isn't the case then unfortunately the microcontroller is probably the issue, making it infeasible to fix.
I've worked on DS4's before yet never encountered something exactly like this. I have to say it's a pretty weird issue. Here's what could be going on:
The analog sticks are independent of the cable sheet on the DS4's, Hence my initial thought would be that something has gone wrong with the main microcontroller onboard the controller and somehow an association has been created between the left analog and R2, someone mentioned something similiar in the xbox thread you mentioned.
Now IF this were the case, essentially repair is not feasible unless you have a replacement microcontroller and the skills to replace it successfully, BUT I highly doubt that this is indeed the case as I've never encountered a similar sceneario when working on DS4's
What I think more likely is the case is that the cable sheet got damaged when you were cleaning it, those things are ridiculously fragile and I've had multiple go bad in weird ways while trying to clean them. Since you said that before cleaning the sheet the controller was behaving differently and no association existed between left analog and R2 I believe that further proves my theory. The movement of the analog stick might be physically compressing the sheet in a way which causes right trigger to press down..
So, now what?
Well one way to confirm this theory is to disassemble the controller and completely take the sheet out and reassemble the controller, of course no buttons will actually work now apart from the analog sticks since those are soldered on the motherboard. So in theory by doing so, if the sheet was causing the issue, then the left analog should no longer be effecting the R2. If that is the case, go ahead and buy a replacement sheet (I believe it's called a membrane which is the proper term, if you want to find a replacement that is the keyword you should use.).
If this isn't the case the unfortunately the microcontroller is probably the issue making it infeasible to fix.
Good luck!