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OT but what was the deal with the Toyota thing? I read something about this on HN the other day and as far as I can see they were unable to reproduce the bug ht

by aidos 11y ago

OT but what was the deal with the Toyota thing? I read something about this on HN the other day and as far as I can see they were unable to reproduce the bug https://en.wikipedia.org/wiki/2009%E2%80%9311_Toyota_vehicle_recalls#Electronic_throttle_control_system https://en.wikipedia.org/wiki/2009%E2%80%9311_Toyota_vehicle... Would love to hear more about it from anyone who has more information.

stagger87 11y ago
This was my favorite read, https://users.ece.cmu.edu/~koopman/pubs/koopman14_toyota_ua_slides.pdf https://users.ece.cmu.edu/~koopman/pubs/koopman14_toyota_ua_...
- aidos 11y ago
  Thanks! That picture of the ETCS board has just reminded me of a time my friend gave me a tour of the Mclaren F1 workshop – he worked on the testing team. They'd just spent a couple of weeks tracking down an issue where the engine had misfired during one of the races (like, once or twice). Turns out that the tracks on one of the control circuit boards were a tiny bit too close and there had been an arc. I couldn't believe how much work they had put into figuring it out.
  - extrapickles 11y ago
    Since they are limited to 5 engines per season[0], they were probably very worried that the fault could lead to the loss of an engine. When I did racing, for even the most minor of faults/errors/"that's odd", large amounts of effort were put into correcting the fault if it was on the list of "If this broke, we lost". [0]: http://www.formula1.com/content/fom-website/en/championship/inside-f1/rules-regs/Power_Unit_and_ERS.html http://www.formula1.com/content/fom-website/en/championship/... edit: grammar fix
LeifCarrotson 11y ago
The code was (probably typical) contractor spaghetti code, with plenty of potential bugs. But, no conclusive reproduction steps were ever found - much less any that would cause it to continue acceleration with the brakes on, transmission disengaged, or key off.

by aidos 11y ago

stagger87 11y ago

This was my favorite read, https://users.ece.cmu.edu/~koopman/pubs/koopman14_toyota_ua_slides.pdf https://users.ece.cmu.edu/~koopman/pubs/koopman14_toyota_ua_...

aidos 11y ago
Thanks! That picture of the ETCS board has just reminded me of a time my friend gave me a tour of the Mclaren F1 workshop – he worked on the testing team. They'd just spent a couple of weeks tracking down an issue where the engine had misfired during one of the races (like, once or twice). Turns out that the tracks on one of the control circuit boards were a tiny bit too close and there had been an arc. I couldn't believe how much work they had put into figuring it out.
- extrapickles 11y ago
  Since they are limited to 5 engines per season[0], they were probably very worried that the fault could lead to the loss of an engine. When I did racing, for even the most minor of faults/errors/"that's odd", large amounts of effort were put into correcting the fault if it was on the list of "If this broke, we lost". [0]: http://www.formula1.com/content/fom-website/en/championship/inside-f1/rules-regs/Power_Unit_and_ERS.html http://www.formula1.com/content/fom-website/en/championship/... edit: grammar fix

LeifCarrotson 11y ago

The code was (probably typical) contractor spaghetti code, with plenty of potential bugs. But, no conclusive reproduction steps were ever found - much less any that would cause it to continue acceleration with the brakes on, transmission disengaged, or key off.