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A comment on Tesla cut a steering component from some cars, didn’t tell customers. Parent comment

Re:Tesla cut a steering component from some cars, didn’t tel... by rasz on Tuesday February 08, 2022 @01:05PM (#30262010)
What you describe is a software fallback (Limp mode), and doesnt require another separate computer. US cars are not my forte, can you name actual year/model so I can see with my own eyes that extra backup ECU unit just sitting there doing nothing?
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Re:Tesla cut a steering component from some cars, didn’t tel... by bayindirh on Tuesday February 08, 2022 @01:17PM (#30262188)
The manual actually stated that there's a "separate, lower capacity, backup ECU is embedded inside the ECU in a case where the main one is damaged and unable to operate the car. That ECU can keep engine synchronization up to 60KM/h and 3000 RPM".

In one case, my parent's car's ECU (we drive the same make/model) blown one of its coil signalization lines. In that case the car has no backup for example. You need to tow it, because it can't understand that it's output is gone, and can't get into proper limp mode. You need to tow the car.

Cylinder disable on overheat and other modes are proper "limp modes" which keeps car operational when other systems get damaged, but not the ECU.

The automatic transmission has its own limp mode too, which is activated by selecting the 3rd gear and making some other internal pressure adjustments.

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Re:Tesla cut a steering component from some cars, didn’t tel... by rasz on Tuesday February 08, 2022 @01:44PM (#30262591)
Why not just reveal that hypothetical car so we can actually verify instead of buying marketing claims?
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Re:Tesla cut a steering component from some cars, didn’t tel... by bayindirh on Tuesday February 08, 2022 @02:30PM (#30263314)
I've told that it's a 20 year old Ford because most of the cars (Fords) of that model year share the same electronic infrastructure. But, here you go:

"2001 Ford Focus MK.I"

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Re:Tesla cut a steering component from some cars, didn’t tel... by rasz on Tuesday February 08, 2022 @03:30PM (#30264192)
You need to be more specific than that. Here for example is Delphi ecu used by Ford Focus at least between 2001-2005 https://mte.sk/blog/oprava-riadiacej-jednotky-ford-focus-1-8...

Looks like later switched to Bosh https://www.ecufile.net/ecu-file-description/BOSCH-EDC16C34-... https://www.ecufile.net/ecu-file-description/BOSCH-ME9.0-026...

no second ecu hidden inside

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