Tag: tin-whiskers

Why Toyota Has a Whisker Across its Bumper

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When you’ve shelled out big bucks for a message, the dissenters have to be squashed – and fast. Yesterday, Toyota public relations rapid response team tried to bring the Toyota Unintended Acceleration (UA) problem back into its multi-million-dollar corral at the There’s Nothing to See Here, Folks Ranch.

Mike Michels, Vice President for External Communications of Toyota Motor Sales, U.S.A., wrote an editorial, in response to a well-reported and written story by the Huffington Post’s Sharon Silke Carty about one of the most significant physical findings of the NASA Engineering Safety Center’s (NESC) study of the electronic causes of unintended acceleration in Toyota vehicles: tin whiskers. Tin whiskers are crystalline structures that emanate from tin and other alloys used as solder on printed circuit boards. These nearly microscopic metal hairs can bridge circuits, leading to electrical shorts and significant malfunctions. They have caused failures at nuclear power plants and medical devices and downed satellites. While we don’t believe that they are the cause of UA in all Toyota vehicles. Clearly, tin whiskers have been strongly implicated as a cause of UA in some Toyota vehicles. Continue reading →

NHTSA-NASA Reports Show That Toyota Electronics are Deficient – Can Lead to Unintended Acceleration: Toyota’s Involvement Exposed in New Documents

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REHOBOTH, MASS – The Safety Record, Safety Research & Strategies’ watchdog publication, published its new findings on the National Highway Traffic Safety Administration (NHTSA) and the NASA Engineering and Safety Center (NESC) reports on Toyota Unintended Acceleration.  Following extensive review of those reports and previously unavailable documents recently released by NHTSA and interviews with numerous scientists and experts, the authors found that:

  • – NASA identified numerous failures in Toyota electronics that could lead to unwanted acceleration.
  • – The report was heavily influenced by Toyota and its experts, including Exponent.
  • – The reports were narrowly construed examinations of limited vehicles and components.
  • – Much of the reports remain shrouded in secrecy. Continue reading →

We Read the Report. Did Ray?

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Last week, NHTSA pitched its two technical tomes on Toyota unintended acceleration at a pack of reporters, declared that the automaker’s electronics were fine, and ran away. Our esteemed Secretary of Transportation Ray LaHood then made the media rounds, grousing that the critics hadn’t read the report, which leads us to ask: Did Ray?

We’ve been reading it and re-reading it, and conferring with a wide range of technical experts – some of whom have extensive experience in engine management control design, validation and testing. And we gotta tell you, Ray, we aren’t ready to buy our kid a new Toyota.

Far from exonerating Toyota electronics, the reports by NHTSA and the NASA Engineering and Safety Center (NESC) confirm the paucity of the automaker’s safety diagnostics. The NESC team also identifies how the two signals in the accelerator pedal position sensor can be shorted in the real world – leading to an open throttle (aka, tin whiskers). Hell, NESC found the potential in three pedals – that’s a pretty significant percentage in a very small sample. Tin whiskers are such a serious issue that NASA has devoted considerable resources to studying them. They have wreaked electronic havoc on everything from medical devices to weapons systems and satellites. Yet, the NESC report treated the discovery of tin whiskers in a third of their pedal sample like a dead end, instead of a promising avenue of study. Continue reading →