As promised, it's been a year since we debated cracking the Gen7 PCM........

[geddys]

From TC39x manual you can read that there is dedicated HSM module ( https://www.infineon.com/dgdl/Infin...N.pdf?fileId=5546d462712ef9b7017182d371dc1d95 , https://www.infineon.com/dgdl/Infin...N.pdf?fileId=5546d46274cf54d50174da4ebc3f2265 ).

Their devtools allow you to interact with it via JTAG if I remember correctly and upload new keys.
But I believe there is CANBUS procedure for adding another key to HSM, as part of current security trend is treating possibility of key revokation a real thing. ( I work in banking industry, and this is something normal since like at least 15 years )

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[Rolls]

Very interesting. I guess it opens up room for an exploit for someone with the right skill set.

The HSM is ARM as well which increases the number of developers familiar with the assembly langusge.

 

[geddys]

Very interesting. I guess it opens up room for an exploit for someone with the right skill set.

As I mentioned in my first reply here, if there will be no PCM's on ebay for coffee money then no one will bother fucking around with it. Its just too expensive to bother for fun.

 

[K4fxd]

As I mentioned in my first reply here, if there will be no PCM's on ebay for coffee money then no one will bother fucking around with it. Its just too expensive to bother for fun.

As more of these cars get totaled the PCM's will be available.

Like @Rolls said after the warranty is up Ford won't care.

 

[geddys]

As more of these cars get totaled the PCM's will be available.

Like @Rolls said after the warranty is up Ford won't care.

I think Ford doesn't care even now ;-) Enhanced security is just another milestone to be crossed when going to self-driving or only rented cars path. And from my experience, big corporations that sell products ( not data ) don't give a shit about security. As long their supplier provides proper paperwork to cover their asses its all fine.

 

[Angrey]

I think Ford doesn't care even now ;-) Enhanced security is just another milestone to be crossed when going to self-driving or only rented cars path. And from my experience, big corporations that sell products ( not data ) don't give a shit about security. As long their supplier provides proper paperwork to cover their asses its all fine.

All the smart people are gone at Ford. It doesn't take a marketing genius to know that aftermarket mods drive new sales. But in the modern cloud of dust that is EV's, I'm sure some over paid MBA is blaming the lack of mustang sales on EV's.

If you create a car that's beloved to the enthusiast community for ease of modifying, it helps to gird the sale of new vehicles. If you crush the aftermarket community, enthusiasts simply move on to the next best thing. Which implies to me that none of the assclowns running that circus own a mustang or better yet are deep into the enthusiast community.

Ford has taken that dangerous gambit of selling less units for more profit/unit. Which makes your business model brittle and unstable.

Anyone with a business brain will tell you that if your vendors are marking shit up like crazy (above MSRP) that you're not producing enough supply. Instead of intentionally choking supplies, Ford should recognize the opportunity to sell more vehicles to more people. They called the GT500 CF Track Pack a "golden ticket" for Christ's sake. That tells you all you need to know about the geniuses running Ford.

What they should have been doing is saying "we'll gladly make enough GT500 cars for anyone who wants one. Thank you for your business."

instead of focusing on grass roots (what got them here), cater to your base customers by providing awesome products for great value, instead we get the GTD, which benefits virtually no one. Virtually none of that overpriced shit is going to find it's way into production or base model mustangs. Not the transaxle, not the CF body parts, not the active aero or the multi link suspension, the Magnesium wheels, NONE of it is going to flow down.

Where their focus should lie is making the Mustang GT the most awesome value in the pony/enthusiast car realm. And shutting the door on aftermarket tuning (which opens the doors to a whole litany of more modifications) which drives the car popularity, just screams tone deaf to the market. Of course, this comes after the same geniuses called a 4 door electric Aztec knockoff a "mach-e." Never in the history of the mustang has it ever been anything other than a 2 door coupe. Imagine how stupid it would be if Chevrolet made a 4 door electric pickup and called it the "corvette-e" or if Chrysler made a 2 wheel drive electric minivan and called it the "Wrangler-E."

It's a bunch of clowns. Honestly.

And did you see Shelby American's response to the criticisms of the new "GT350?" "we worked hard on this." No you didn't. No you absolutely did not.

Imagine for a moment that Ford decided to take all the R&D, all the production efficiencies that are already in place with the previous GT350/GT500 programs and said "we're going to take every single one of the best performance features and most loved aesthetic features and put them together to make a new mustang GT parts bin car and sell it for less than the current Mustang GT. It'll cost us ZERO investment in R&D, the supply chain contracts are already in place and the tooling and assembly line is already there. We can sell the car for less and still make more money. AND the best thing in the world is that the customer gets an awesome car at an awesome value!." Even if you had to pay a gas guzzler tax (which you could CLEARLY make an add on cost, thanks to the government) you'd sell a zillion of them.

Anyway, that rant aside, when you write "Ford doesn't care." You're not kidding. They're absolutely oblivious.

 

[robvas]

As I mentioned in my first reply here, if there will be no PCM's on ebay for coffee money then no one will bother fucking around with it. Its just too expensive to bother for fun.

Plus don't you need not just the PCM but the whole system from the car?

 

[robvas]

It's a bunch of clowns. Honestly.

Anyway, that rant aside, when you write "Ford doesn't care." You're not kidding. They're absolutely oblivious.

That's what it seems like sometimes.

One thing I would say though is that I count the GTD to be something more like the Ford GT models (5.4 and EcoBoost), they are just halo vehicles and maybe one or two things will trickle down. But it's alright that they aren't a real (maybe the right word is 'production') Mustang.

I think a lot of people would agree with this clip:

 

[geddys]

Anyway, that rant aside, when you write "Ford doesn't care." You're not kidding. They're absolutely oblivious.

I just see same pattern in IT industry.

It has become so bloated with people that have no clue about anything that it turned really cool industry ( IT in general ) where it was all about innovation and being proud of what you made into absolute garbage where you just can't do cool shit anymore because 6hour per day of virtual meetings organized by multiple Jessicas is more important than doing actual work that will make money for company.
And my experience is from Central Europe where we are behind few years with that crap from USA so I can't imagine how much worse it already got in the West.

 

[geddys]

Plus don't you need not just the PCM but the whole system from the car?

I think only PCM is needed.

I managed to find somewhere VBF file of S650, and difference between S550 3gen and s650 is just added RSA signatures to parts of calibration. And its quite same for any other Ford gasoline vehicle after 2023 that had facelifting along the line.

Just regular searching through binary to find calibration tables show mostly the same values between s550 and s650 so my guess is that they didn't change much here.

 

[K4fxd]

Just regular searching through binary to find calibration tables show mostly the same values between s550 and s650 so my guess is that they didn't change much here.

The 2024 Dorkhorse tune is out in the wild to be looked at. No one can flash it yet that I know of.

 

[Rolls]

Plus don't you need not just the PCM but the whole system from the car?

Just on this topic I got basically all the electronics from an entire F150 from the middle east shipped to Aus. Cluster, PCM, BCM and about 25 other modules with looms. People just leave brand new cars crashed everywhere.

Find some contacts, be loyal and they will return the favour. Their culture is very different, if you help them they will help you. I'm sure you could essentially get the same from a Mustang for a grand or so if you are loyal and return the favour.

 

[Rolls]

I think only PCM is needed.

I managed to find somewhere VBF file of S650, and difference between S550 3gen and s650 is just added RSA signatures to parts of calibration. And its quite same for any other Ford gasoline vehicle after 2023 that had facelifting along the line.

Just regular searching through binary to find calibration tables show mostly the same values between s550 and s650 so my guess is that they didn't change much here.

You may be able to dowgrade an S650 to an S550 electronically with the right amount of patience. Though it begs the question, why not stick with an S550 especially as you'll be likely modding it out of warranty.

 

[Oakley]

You may be able to dowgrade an S650 to an S550 electronically with the right amount of patience. Though it begs the question, why not stick with an S550 especially as you'll be likely modding it out of warranty.

as 650 with a 550 dash would be worth a look in my opinion!

 

[mejohn50]

So every January, we'll revive this thread to check in on how the "hacking" efforts on the new PCM are going.

Dredging this thread back up before January 2026 due to some cryptic posts @beefcake has made. Wondering if there’s anything else that can be shared yet.

https://www.mustang6g.com/forums/threads/s650-is-finally-getting-tuning.218390/

https://www.mustang6g.com/forums/threads/looks-like-tuning-for-the-s650-is-just-days-away.218389/

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