The contactors just need to open for the issue to be "fixed". This can happen through the manual method I described, or leaving the car alone to sleep. For it to sleep it can't be charging and I think Sentry mode must be off too. One the contactor opens and the HV battery is disconnected, it resets the system and fixes these annoying issues.
The car needs to go to sleep, either leave it sitting with sentry off overnight or pull the battery connectors.
Thanks. It’s been sleeping for 2 hours already and I’ll let it sleep all night. I also spoke with my favorite SC Manager and he told me it might be a firmware bug. He’ll dig into it and call me back when he has more info. Another thing we might try is to have him push the firmware to me again. At any rate, this has never happened since I took delivery in July 2019 so something is amiss.
Any software update will "fix" the issue because it will cycle the contactors as well. If you really want to get rid of it without waiting, just pop the negative terminal off the 12v battery in the frunk, then lift up the rear seat bottom cushion and disconnect the harness from the HV battery contactor on the passenger side. But in my experience, leaving it overnight usually solves it.
Thank you, I’ll give that a shot. I had already tried to use the “power off” function for 10 minutes and that didn’t work yesterday.
Yeah that won't do it either, the contactor isn't really controllable by the user. The only way you can really cycle it yourself through software is via an update.
I just spoke with the SC Manager and he agreed that he would follow the Hard Reset approach as a test. Typical Tesla won’t touch my car for this as I replaced the 12v battery from lead acid to an Ohmmu. So I’m on my own anyway.
I would do it yourself anyways, as waiting 1-2 weeks for a service appointment will likely see the issue fix itself from sitting. Either wait it out or just reset it yourself. Have you tried pulling the contactor harness yet? It's super easy. Also if you're gonna try waiting it out, make sure the car gets to sleep. As in, no charging it overnight, sentry mode off, etc.
Yeah, I’ve done that a few times already. I do most work on my car myself anyway. I did the reset this morning and it did work out. Thanks!
Glad to hear it man, the reset has saved my bacon about 4 times since I got the car half a year ago. Things like GPS malfunctions to black backup cameras and purple lines on my backup camera.
I’ve done quite a few mods. And anything that relates to a mod the SC won’t touch. Was never this way with my Audis, Porsche’s, etc. But hey, I can manage most things myself. Tesla can deal with the big issues related to the HV battery if needed.
It's weird how changing out a 12V battery scares them away. Like you said I can't imagine a normal car company minding you changing a battery.
I have the black cam screen occasionally and the backdoor/cable problem most of the time. Power off for 3 minutes. Problem goes away for a while. I usually live with it.
Oh yeah I'm aware of the method via removing the 12v battery terminal and then unplugging the contactor harness under the rear passenger side seat. It's just not easily accessible to the user. It has saved me multiple times when I don't want to wait X amount of hours for my car to sleep. Just a lot of users are scared for whatever reason to do it.
