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Multiple issues with my 2018 Model 3

AlanSubie4Life

Efficiency Obsessed Member
Oct 22, 2018
13,382
17,028
San Diego
ttached is a reading of the 12V, same pattern (it's a brand new 12V)...
Bizarre. Obviously at this point you have changed your Tesla password and not given access back to anything, too. No access by anything.

Only time I ever saw anything like this was when I had Stats enabled (which is why I have disabled it for two years while it is being “fixed”). And even then it was not the same as what you see.

Anyway, here is normal:

9B58EA18-F922-4CCF-8F94-EFE208570B65.png
 
I had a similar situation around March-May time frame.
Likely introduced by one of the OTA software updates (there is a definite downside to the needlessly frequent and poorly tested updates).
Likely remedied by one of the May/June updates.

I am not certain if Canadian market gets updates on the same timeframe as the US.



Time to look into the "lemon law" provisions in BC?
I think you've given Tesla SC enough tries to resolve the issue...

a
Appreciate you providing this info. I wonder if mine is FW related or something else, my screen also goes black from time to time before starting a drive and takes about 3-4 mins to come online...

I just moved to Toronto and I'm now on my second appointment with Tesla Mississauga (had about 4 or 5 with Tesla Victoria, BC). The staff here are much better and they've been very cooperative. As of today, they've taken my car to monitor this issue and keep it overnight. I've been given an LR RWD loaner so I'll see what they come up with, funny enough its like VIN 322XXX and the build quality is shoddier than mine (029XXX). I had this issue occur around end of Jan, but it triggered weeks after the last update. It didn't present itself immediately after an OTA per say. I've had multiple updates since. Currently on 2022.16.3. I think the US/CAN builds are quite similar minus a few things like Summon range etc.

I'd like to see what the folks here turn up with. They have honoured every service visit related to this issue as under warranty (even though I'm past my 4 years). Haven't had a single issue with build quality, paint, or suspension on my car so I'd like to keep "Kuzco" if I can lol.
 
Bizarre. Obviously at this point you have changed your Tesla password and not given access back to anything, too. No access by anything.

Only time I ever saw anything like this was when I had Stats enabled (which is why I have disabled it for two years while it is being “fixed”). And even then it was not the same as what you see.

Anyway, here is normal:

View attachment 831029

Yeah, the car does this weird behaviour even if I turn off Mobile Access in the car. Definitely not an external ping causing this. I took TeslaFi and TeslaMate offline as soon as the issue became apparent. PW has been reset maybe 5 or 6 times in the last few months. Hoping that they find the culprit. I'm starting to suspect my MCU to some degree. Car takes a while to bring the screen on-line at times like ~4mins even with a drive initiated. Sometimes the car takes forever to wake up (suspect when this black screen issue is occurring, and I'm trying to access it remotely).

Boy I would do anything for a 12V readout like that, feels like an eternity.
 
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Tesla found my VC_FRONT or Front Body Controller to be faulty. I've got an appointment (pending the part availability) for it to be replaced. Will report back if it does fix my issue. Logically speaking it makes sense (but so have some previous fixes). VC_FRONT receives a connection from the 12V battery as per Ingeenerix's tear down and it's very plausible that one of the MOSFETs/Caps just crapped out and keeps draining the 12V. Thought it's rare on solid state architecture but I do have an early model I guess...
 
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