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this post was submitted on 16 Jan 2024
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Does anyone know of a resource for figuring out where the SIM cards are in all these modern cars? You really can have all the privacy you want if you remove the ability of these spywheels to call home.
Why wouldn't they be an eSIM?
fair point!
Next next thing would be to install a little Faraday cage over the cellular antenna.
Or just remove it entirely.
Probably the equivalent of where the Death Star's weakness lies. Hard to reach on purpose.
For sure -- but I'm not asking if average joe-asshole can figure out which end of the screwdriver works best. I'm asking if there's resources for where in the car the black boxes live. Service manuals - ect.
There is. On my toyota it was called the DCM telematics module. Had its own fuse so it was super easy to disable.
interesting! was there any persistent warnings or error messages that popped up or did it just keep on trucking without any user prompting?
The car mic and one of the right side speakers stopped working. The ota updates also stopped arriving, and toyota stopped sending me emails about where my car had been / how long it was driven. The emergency button which calls the toyota help line is also broken now.
There were no warnings from my car at all after i pulled the fuse.
There's some forum posts about rewiring the speaker back into the system - apparently you only need an extra plug, a little bit of wiring skills, and access through the glove box to get it working again. I havent personally done it yet, but ill get around to it at some point.
Wow! That speaker bit is the most interesting thing to me. It means that the speaker itself is powered or pre-amped in some fashion which makes so very little sense to me. Is the fix simply putting a wire from a->b bypassing the fuse?
Yeah, it goes through the emergency call system, but just connecting the wires and leaving the dcm box alone is supposed to fix it. I have the forum post saved if you wanna look; https://www.toyotanation.com/threads/how-do-i-locate-the-dcm-telematics-unit-on-a-2020-corolla.1693507/#post-14400614
OH! for emergency calling... derp.
Sorry to say but I bet they are eSim