Unfortunately it didn't help. I connected additional contacts, tried to use a better quality ELM adapter. But the result remained the same.
Could this be because the car was crashed? Does the battery have some kind of pyrofuse or contactor that might have triggered?

Connect both contacts to - ?
Sorry for the stupid questions

No, I connected only one way.
+ and - are also connected to an external 12v battery.

Hello everyone,

I need some help, please. I'm trying to connect to a removed Model 3 battery pack (it's been taken out of the car) to check its specifications using an OBD2 (ELM) adapter.

I managed to connect using the "Scan My Tesla" app, but the app is displaying very limited data.

Could this ...