how to disable the DCM/Telematics unit in the car

To confirm, again, some of us have ZERO use for the DCM and the services it enables. As such, removing/disabling it is not an extreme solution. And why are you so hung up on data collection? Why are you ignoring all the other benefits of disabling it that I've listed and given examples of? You have a very myopic view of the situation. You also can't just unplug the antennas because it has enough trace wiring inside it that even though the transmit range becomes minimal with termination plugs installed, it can and will transmit.

Simpler solution for disabling the DCM telematics - Silencing Antennas | Page 5 | Tacoma World

There is literally no downside to the community investigating this AND tinkering with it. You won't convince me that ANY company, especially one as large as Toyota, will never mess up when it comes to my privacy or security. Apology and Notice Concerning Newly Discovered Potential Data Leakage of Customer Information Due to Cloud Settings | Corporate | Global Newsroom | Toyota Motor Corporation Official Global Website oops. Toyota warns customers of data breach exposing personal, financial info oops again. To sit there and think that Toyota will NEVER again be victim of a security breach or a lapse in judgement where they decide to collect information despite you opting out, is just dumb. And if you really do believe that could never happen then there's just no helping you.

Simpler solution for disabling the DCM telematics - Silencing Antennas | Page 5 | Tacoma World

Because even with the antennas disconnected and dummy plugs inserted which should absorb all signal, apparently it can still reach out.

See the link I posted to the guy in this same post.

 

No need for an additional subscription. Just use Apple Car Play or Android CarPayand the appropriate phone applications.

 

Unless they mean they want to do in car wifi or hotspot repeating? I think the car can become a hotspot on its 4G connection. At least, I have the option to enable it in my car and it seems to work so long as I'm not using wireless carplay (which uses wifi to connect)

For my part, this kind of mod would only be helpful or preferred if at some point in the future, all the features are discontinued but the module somehow pulls a draw on the battery like that old subaru link noted, searching for a signal that will never exist. Until then, and assuming Toyota doesn't simply offer an update to disable it entirely once its too old, I'm fine with the features it enables. The SOS button for example, is actually a nice safety feature and idea, which I am sure requires the DCM and remote connection stuff to work.

 

Toyota is a member / partner of the World Economic Forum, that should be enough to caution you.
If you are not familiar with the WEF I suggest you investigate...
https://www.weforum.org/organizations/toyota-motor-corporation/

 

Thank you, I'll try that today.

 

Hey, just joined. So I don't own a Prius- not yet anyway. I run an early 2000s car and while that gets me around just fine, the thing is really quite the gas guzzler and I really do like the look and milage of the Gen 5s. It's a damn good looking car and Priuses seem well regarded for their reliability to boot. I road tripped halfway across the country in a rental '24 KIA Soul and man...some of the now basic/standard newer features like adaptive cruise control and even smaller things like the engine idle not wasting a bunch of gas are so nice. Really want to get a '24 or '25 Prius LE in a few years once those "new car" prices drop a bit and whatever issues they might have become more well known. What I'm not okay with is how creepy and invasive modern cars are. So essentially that's why I ended up here, I wanted to find out how much you can actually disable/work around that.

Before anyone tries to be pedantic about modern smart devices or whatever... I run a Garmin in my car, my phone is GrapheneOS, and I made the full switch to Linux back in 2019 after Microsoft bricked my PC twice with their forced updates. I need to be very clear that I am not a paranoid conspiracy theorist, I'm just fed up with all these stupid companies thinking they have a right to datamine every minute detail of everyone's lives for profit. It's creepy, invades our rights, and we're all worse off for it. I'm no stranger to tinkering around with tech to make things work the way I want, just...not with cars. So yeah. I heard the 2017-2020 era models are easier but man I'm sorry they are just ugly as sin.

I'll be following along with whatever developments happen, so that hopefully by the time I do get my Prius I know exactly what to do. Side note, one of the things I love about modifying the operating systems on my phone and PC is just how much more efficient they are power and resource-wise without all the extra unnecessary crap that I didn't even want in the first place. Hopefully something similar can eventually happen here? I would love for this to be the vehicle I basically just run into the ground.

 

There is some question here on what the car does or does not transmit under various conditions. I have a first-hand observation:

First, my current car is not a Prius, it is an Avalon. Under the sheet metal, it is very like a Prius. I am not signed up for any tele-services and the Sirius XM and emergency assistance subscriptions have long since run out. I have not specifically contacted Toyota to ask them to turn anything on or off. Whatever it is doing I assume is their standard for all Toyotas.

If I am using the GPS guidance to take me somewhere the car will announce that there are traffic delays on the road ahead a few minute before we get to them. This is not something the car can figure out for itself, it has no way to see such a thing. This tells me that it is in contact with something - I don't know who or what- and that it is checking traffic conditions in real time. This mean it is telling something where it is and what it is doing.

I don't mind that it is watching out for me but I do mind that something is going on without my permission and outside of my knowledge and control.