I am actually fascinated by car electronics. I had heavily modified the software on mine, but it was easier than modern stuff, no encryption of the code, and even the checksum code only triggered a DTC with no consequences.

The only module that was encrypted was the main module, but it if you knew the security PIN you could do what you wanted. It was determined by people that if you observed the jitter of the CAN line fast enough, you could leak the pin via a side channel attack.

But modern car electronics are encrypted, and some probably have security processors that might trigger some irreversible states if you tamper with them. Modern cars are basically as locked up as a PS5.

I am fascinated by what you are saying and would love to read more about it. How did you go about modifying the software of some part of your car.

Having worked in this field, I can confirm that most such parts these days come with chip supported read/write protections for part of flash that contain the code. But even with no protections, I think that being able to modify embedded firmware is a feat in itself.

> I had heavily modified the software on mine, but it was easier than modern stuff, no encryption of the code, and even the checksum code only triggered a DTC with no consequences.

What's the vintage of the vehicle? When I was in the 'car enthusiast' phase of my life ECU "reflash/remaps/tunes" were very popular and still happen on more 'modern' cars.

Mazda? Their entire infotainment is just HTML and JavaScript which was quite a shock to discover.

P2 Volvo?

You guessed correctly.

I’ve been following that thread very closely. Prepping myself to install cruise control but as I have a cem-b in my car, I have to solder to the board.

What changes have you made?

For the CEM, I have done no modifications, yet. I have however spent a fair amount of time, reverse engineering the AW55 firmware and have discovered virtually all the maps related to the shifting process, pressures, speeds etc. I have a completely understanding of how the firmware works.

To say I am the only one with such a complete understanding and tuning abilities for it, may not be an understatement.

It seems to be coming in multiple waves from multiple sides.

One of those is EUs ISA: First a display, now a warning and later actual interference with the driver.

And with the experiences with the current status are enough for me to be against those systems. The car doing an emergency stop because it saw a 30 sign an an adjacent road makes me not wanna purchase such a car. But there will be some time where no alternatives exist.

>>And with the experiences with the current status are enough for me to be against those systems. The car doing an emergency stop because it saw a 30 sign an an adjacent road makes me not wanna purchase such a car.

Just to be clear - I hate these systems. They are unnecessary, don't improve safety, and increase the cost of new cars for everyone.

But, no system in any car works the way you described it. Even if the car recognizes a speed limit sign from an adjecent street(which happens all the time and I have experienced it too) - the only thing that will happen is that it will bong at you, it won't do "an emergency stop". The more hardcore version of the EU laws around it will require cars to stop applying throttle when going faster than the limit, but literally no legislation proposed or implemented now or in the future requires the cars to actively slow down(ie - apply brakes without your input).

I'm sure you are overestimating what an average car buyer cares about when buying the car. From the world where people pay for listening devices to put into their homes, small tracking devices they can stick into everything and so forth. Maybe if it becomes 'fashionable' to worry about privacy, and even then it'll be because it is popular not because majority will become privacy conscious. Unfortunately.

I think stronger regulations, protections and security is the way forward. Not going against the flow, as that is unfortunately a lost battle.

I had looked into removing the OnStar unit in my first gen Chevy Volt when I bought it a few years ago. I had found the same information, if I removed it the car would have all kinds of weird behavior.

Unrelated to removing telematics, but I've also had it go completely insane when the 12V battery us even slightly low. Chevy puts their cars into a battery saver mode that disables a bunch of systems, then it throws error messages for all the disabled systems needing service.

Makes me really appreciate my 1980s pickup truck. The last owner had the dealership clean out the gas tank and their mechanic forgot to reattach the fuel pump's ground. It was happy, but even that didn't stop it from running.

If you're thinking of OnStar, it's because removing the module breaks the MOST ring. Bypass the ring around the missing module and you'll get some DTCs but everything mostly works again.

Some developing countries such as India, are completely banning the ply of old vehicles on the road.

I'd imagine India has some pretty insane stuff driving around so that's not surprising. The US effectively did that (arguably even more extremely) 15 years ago with the "cash for clunkers" thing.

There's this bizarre alternative history around "cash for clunkers" where an incentive program has been rewritten as this great evil that forced older vehicles off the road. All participation was voluntary. While internet commentators bemoan the "classic" cars scrapped in the program, these were almost certainly in terrible condition - people with classic cars in good condition know their value (or at least the party taking it as a trade-in does).

In some dystopian future we may have to consent to the DMV to be tracked. They can make whatever rules they want to before they give us permission to use their roads.