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Very unlucky!!So I am experiencing the same issue with my right rear handle and have done many of the same steps as you (tested voltage, wire continuity, handle motor with 12v power source, etc.) and several additional steps - I have bought a handle with same model number and swapped the module and it is still not detected. Updated the micro switches with the flexbile wire. I acquired a third handle and tried it, still not detected. I disconnected the door control unit at the front door and rebooted the car, then plugged it back in to see if maybe in needs to rediscover / rescan the devices on the LIN. Still not detected. Now I have ordered a used Door Control Unit from eBay for $20 and I may replace that next. That may require Tesla toolbox to program so I am hesitant. I cannot find any info on how to swap control units and what is required, does it need to learn the VIN to talk to the ECU, etc.View attachment 1008445View attachment 1008443View attachment 1008441(Ignore the plug disconnected on the handle in the photo as that is before I buttoned everything up). Either way, I will update this post if I find anything.
Yep… and it is a strange one. I traced the wires to the front door control unit when I disconnected it and they have continuity. Also the LIN and 12v wires have voltage (10 and 12 respectively) at the rear handle connector which tells me they have a connection to the door control unit at the front door.Very unlucky!!
Have you tried to check the wiring in the door and also the front door? That's a common problem and if one wire is cut, you won't have any signal.
Do you know for sure the handle module you bought is for a left front one?Update of the day, I finally found some time to replace the handle module by a brand new one. The handle behaves exactly the same as before so not improvement.
I put the one I removed in the rear door handle and the rear is working fine now.
So it tells me that the only part in the middle that should send the handle version model to the MCU (which is still unknown), and that is between the fuse that blew up and the handle module, is the Door Control Module.
I'll try to replace this one, and then, if it doesn't, I'll bring the car to the Tesla.
Do you know for sure the handle module you bought is for a left front one?
Also if you disconnect the manual inner release cable for the front door it still opens from the inside?
1- That's a good question and actually I'm not sure how I could double check that in a sense that I ordered a brand new module with the same reference as the initial one.
2-Yes it opens through the electonic switch from the inside, so it means the door latch works properly and honestly, I'm starting to think I will "duplicate" this switch signal to the one in the handle and make the car thinks I use the internal handle everytime. (not easy to explain that in English...).
Is there a part nr on that handle module?
Since left front and rear door handle share the same linbus they must/need to have their own address.
Agreed with the blown fuse, to bad left front door handle and door module share the same fuse
They're all connected to same linbus (LF handle, LR handle and window things see wiring diagram) but they must have their own 'digital adress' so DCM can talk to them individually. DCM is master and rest is slave.Yes, the part number is 1022379-00-B and seems to be the same without regards to the handle location.
Don't you think the Linbus signal go to DCM then the door module manages separetly the signal for the front and rear handles?
View attachment 1011349
I agree that it doesn't make sense but at least I'll be one step further troubleshooting the problem.They're all connected to same linbus (LF handle, LR handle and window things see wiring diagram) but they must have their own 'digital adress' so DCM can talk to them individually. DCM is master and rest is slave.
It doesn't make sense that all lin components on that linbus connected to DCM are working except LF handle. I'd be surprised if DCM is broken but nothing is impossible.
So your old LF and LR inner door handle modules share the same partnumber??
One thing that came to my mind is to check if the wiring from the outer handle to the latch is not broken? Why would you had then the blown fuse? Can’t confirm that there is separate cable from the outer handle and from the inner handle. But how would the car know to act if you use either inner or outer hadle?
I checked with @Mr.P. he has 2 spare door handle modules (RF and RR) and they both share same partnr 102237900B so that confirms your research BUT I still think they are not interchangeable due to different flashed firmware in the handle module itself.I agree that it doesn't make sense but at least I'll be one step further troubleshooting the problem.
Based on my research all handles share the same parts number, so at some point, there must be a programming or something to do to make the system recognize the handle.
Thanks @Gtech that'S really interesting!I checked with @Mr.P. he has 2 spare door handle modules (RF and RR) and they both share same partnr 102237900B so that confirms your research BUT I still think they are not interchangeable due to different flashed firmware in the handle module itself.
Here EG confirms you cannot interchange door handle modules:
So if I'm right there is a 75% change you didn't received a LF door handle module.
Unless you can read LIN signals don't think you can or you can try fitting it to every door to see when it responds.Thanks @Gtech that'S really interesting!
So now the question is, how can you identify the location of a handle module?
Good question, now they only sell gen 2.1 and 3.0 door handles so no specific parts from old obsolete handles. I believe in the past you could not buy separate door handle modules for gen 2.0 only complete with plastic housing.What about a new one? if they share the same part number, there must be a way to first program the module and "write" its position.
Believe that procedure is for gen 2.1 and 3.0 handles.I checked the Tesla Service manual handle replacement and the mention a firmware reinstall has to be done. Maybe it's related to that, IDK.
View attachment 1011768
I though that you already did this, was that mentioned in your post #10?I checked the Tesla Service manual handle replacement and the mention a firmware reinstall has to be done. Maybe it's related to that, IDK.
I though that you already did this, was that mentioned in your post #10?
Not exactly, I did the CAN redeployment, and I have to admit I fear a bit trying to redeploy the "whole" system.