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Originally Posted by DavesSpectra
To address your opening statement...
"Why should that be any worse than a design/manufacturing fault on a vital mechanical part?"
TOO MANY VARIABLES and interactions between systems...
All of the Millions of Intel processors "were the same" and their "simple calculating error" built into those processors DID cause such MAJOR problems such that an external piece of software had to be added to make sure that firmware calculation was never used. This "bug" was not found UNTIL the CPUs were installed and in public domain.
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Yep, being the same was precisely the point. And you ignore that electronics devices in cars will be very mature before reaching the user; engine management and ABS have been around for well over 20 years and unlike the flashy bits for the consumer's eyes, the development cycle need have no concerns about fashion.
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If you check the interaction between MPUs (ECM/TCM/BCM/SRS/ABS (antilock braking) /etc...) an "error" may not be "found" before a mix of the combined functions of the intercommunicating MPUs strike like a "true" slot machine (not like the programmed ones that do not randomly "pay out")..
The 2007~2008 Spectras had a problem with their "auto off" headlights coming back on (in the middle of night most times) when an internal programming bug hit on the right combination of variables were "hit" and it drained the battery. ...Found AFTER a year of driving them...Yes the software was corrected and the "bug" squashed but not ALL Spectras had this problem and there are still some with the old code on the road today.
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Unless all did it, that wouldn't be a characteristic of a software problem. A problem occuring outside the software domain that can be fixed with a software workround, perhaps.
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NOT ALL cars leaving the factory have the SAME programming.. Ref: Canada's so called security system is not here in the USA, ABS on "some" models, Cruse control on some models, manual & automatic versions, anti-skid, traction control...I can go on and on....
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The ECU in my car probably has all the functionality for cruise control even though I have been given no means to access it. It will almost certainly have all the capability to interract with an auto box controller even though auto is not fitted. Individual boxes may be electrically connected the ECU but likely only because the ECU contains a hub for diagnostics - physical connection to the box does not mean separate functions must inevitably interract in a complex manner.
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Your statement "Every car leaving the factory is the same. And car software will be same 10 years after it left the factory." is also flawed and incorrect...
Some cars will get updates in firmware and others will slip through the cracks up till the day they are no longer driven.
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Doesn't alter the principle. My 5 year old Ceed has had one engine update and it's unlikely to get another which still means only two flavours will be in service. Even then, as engine management is so heavily table driven, they probably only changed a few parameters, not the operating code.
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You better check on your windows statement also...Windoz8 (typed that way on purpose) MOST definitely DOES save an "image" of the last few seconds to the hard drive
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That's precisely what I said. Why are are saying I'm wrong, other than not reading? Other than that, just hold on to what I said about car systems not being not being like a PC.
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