My car has one!

It's called an ignition switch!   :-)

Sorry, could not resist

Steve C

-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Marcus L. Thompson
Sent: Friday, February 05, 2010 7:38 PM
To: [log in to unmask]
Subject: Re: [LF] [tinwhiskers] More articles on Toyota's accelleration
proiblem

"that does not work through the computer but simply disconnects the
supply to the coil"

That is not possible; as the additional electrical wire would be far too
costly for the manufacturer to implement --



--- Previous Message in This Thread ---
Subject: Re:[LF] [tinwhiskers] More articles on Toyota's accelleration
proiblem
From: John Burke <[log in to unmask]>
To: [log in to unmask]
Date: Friday, February 05, 2010 4:24:28 PM

>  Hmmm having had experience personally of Toyota design issues, maybe we
can
> look forward to a big red kill switch on the dashboard next to the
emergency
> flasher button that does not work through the computer but simply
> disconnects the suppy to the coil...8-)
>
>
> John Burke
> (408) 515 4992
>
>
> -----Original Message-----
> From: [log in to unmask]
> [mailto:[log in to unmask]] On Behalf Of Bob Landman
> Sent: Friday, February 05, 2010 1:03 PM
> To: [log in to unmask]; '(Leadfree Electronics Assembly Forum)'
> Subject: [tinwhiskers] More articles on Toyota's accelleration proiblem
>
> Article on car technology
>
http://www.nytimes.com/2010/02/05/technology/05electronics.html?ref=business
>
> "According to Bob Hrtanek, a spokesman for the auto supplier Delphi
> Powertrain Systems, the first Delphi units were introduced around 1980 to
> improve emissions systems.
>
> Throttle-by-wire technology, also known as electronic throttle control,
> replaced cables or mechanical connections. In modern systems, when the
> driver pushes on the accelerator, a sensor in the pedal sends a signal to
a
> control unit, which analyzes several factors (including engine and vehicle
> speed) and then relays a command to the throttle body. Among other things,
> throttle by wire makes it easier for carmakers to add advanced cruise and
> traction control features.
>
> These systems are engineered to protect against the kind of false signals
or
> electronic interference that could cause sudden acceleration.
>
> Mr. Emaus says that cars are engineered with "defensive programming" to
> counter erroneous signals. "There is a tremendous engineering effort, and
> testing and validation, to guard against problems," he said. "But given
the
> complexity of the car, can they test against every eventuality? Probably
> not."
>
> Mr. Emaus said that perhaps one in 100 new microprocessor designs had "an
> issue" and might need reprogramming or replacing, usually before it
reached
> customers.
>
> And he identified the metal-to-metal connections between electronic
control
> units and wiring harnesses as a potential weak point."
>
> Braking problems with Prius and Fored Fusion
>
http://www.nytimes.com/2010/02/05/business/global/05toyota.html?ref=technolo
> gy
>
> In the above article Toyota has said that worn pedals can become difficult
> to operate or become stuck partly depressed. Its remedy involves
installing
> a small rectangular steel shim into the pedal assembly.  If the
accelerator
> is not depressed all the way then how is it, if it gets "stuck" that the
car
> accelerates to a speed of 120 mph?  A partially depressed pedal should
> result in 50-60 mph speed.  When the woman in Michigan hit that tree at 80
> mph she was not speeding and suddenly the pedal got stuck.  That
explanation
> does not hold water.
>
> Something is wrong with the electronics.
>
> Answers to consumer questions
>
http://www.nytimes.com/2010/02/05/business/05questions.html?ref=global-busin
> ess
>
> Here's an interesting piece of news.....
>
> The company will install a brake override system on the affected Camry,
> Avalon, and Lexus ES 350, IS 350 and IS 250. This system cuts engine power
> in case the accelerator and brake pedals are applied at the same time. The
> system already exists on the Prius and other hybrids.
>
> Bob Landman
> H&L Instruments, LLC
>
> -----Original Message-----
> From: [log in to unmask]
> [mailto:[log in to unmask]] On Behalf Of Bob Landman
> Sent: Friday, February 05, 2010 3:50 PM
> To: '(Leadfree Electronics Assembly Forum)'; [log in to unmask]
> Subject: [tinwhiskers] Re: [LF] A Change in Paradigm: Maximum Whisker
Length
> Just Got Longer
>
> And there's even more.
>
> There's a lawsuit in Michigan.  A 77 yr old lady driving a 2005 Camry
(that
> is not part of the recall) died in 2008 when her car suddenly accelerated
to
> 80 mph, leap into the air and hit a tree.  The story is in the NY Times
and
> it's very detailed.  Apparently Toyota and the NHTSA agreed not to count
as
> failures any vehicles that suddenly accelerated if the brake had been
> applied.
>
> http://www.nytimes.com/2010/02/05/business/05recall.html?th&emc=th
>
> I had a similar problem years ago in our 1990 Merc Sable.  Had to have a
> diagnostic recorder attached to the car and then we drove it for many days
> pushing a button when the car suddenly accelerated then taking it to the
> dealer to have the record downloaded for analysis.  The dealer finally
> traced the problem to a bad throttle position sensor. Replaced it and it
> happened again. It took THREE replacements before they got us a
replacement
> that did not cause sudden acceleration.  We nicknamed the car "killer".
Not
> so funny now.
>
> Fortunately for us, if we pressed hard on the brake (caught it quick
enough)
> we could stop the car.  We'd be driving along and all of a sudden you'd
hear
> the engine roar.  The first time it did it, I was so surprised I didn't
know
> what to do and then slammed on the brakes.  Good thing we wear seatbelts!
>
> This issue with Toyota more and more smells of a coverup.
>
> Bob
>
>
> -----Original Message-----
> From: Leadfree [mailto:[log in to unmask]] On Behalf Of Whittaker, Dewey
> (EHCOE)
> Sent: Friday, February 05, 2010 1:15 PM
> To: [log in to unmask]
> Subject: Re: [LF] A Change in Paradigm: Maximum Whisker Length Just Got
> Longer
>
> John, Chris and Werner,
> I would have hoped my alternative for a finish would have been more than
> just a term to describe the view of you circling.
> Dewey
>
>
> -----Original Message-----
> From: Leadfree [mailto:[log in to unmask]] On Behalf Of John Burke
> Sent: Friday, February 05, 2010 11:03 AM
> To: [log in to unmask]
> Subject: Re: [LF] A Change in Paradigm: Maximum Whisker Length Just Got
> Longer
>
> Of course if Dewey were on line he would probably state that the American
> consumer takes a dim view of auto reliability problems.....8-)
>
>
> John Burke
> (408) 515 4992
>
>
> -----Original Message-----
> From: Leadfree [mailto:[log in to unmask]] On Behalf Of Mike Buetow
> Sent: Friday, February 05, 2010 9:04 AM
> To: [log in to unmask]
> Subject: Re: [LF] A Change in Paradigm: Maximum Whisker Length Just Got
> Longer
>
> More on Toyota. Now they are questioning if the electronics problems
extend
> to the headlights.
>
>
> http://seattletimes.nwsource.com/html/nationworld/2010986931_toyota05.ht
> ml
>
> Mike Buetow
> Circuits Assembly
> w/m 617-327-4702
>
>>>> REGISTER FOR VIRTUAL PCB -- MARCH 2-4 www.virtual-pcb.com <<<
>
>
> -----Original Message-----
> From: Leadfree [mailto:[log in to unmask]] On Behalf Of Bob Landman
> Sent: Thursday, February 04, 2010 4:29 PM
> To: [log in to unmask]
> Subject: [LF] A Change in Paradigm: Maximum Whisker Length Just Got Longer
>
> Have you read this article ?
>
> Tin whisker induced field failures of medical equipment using flexible
film
> connector (FFC) contact receptacle that is ("matte" <-- supplier's
> terminology) tin plating over 1.5 microns nickel over copper alloy
>
> http://www.dfrsolutions.com/uploads/white-papers/Maximum_Whisker_Length2
> .pdf
>
> Tin Whisker Mitigation
>
> Current, DfR advises companies that mitigation of components with lead
> spacings greater than 500 microns may not be necessary if the plating is
> matte tin and the manufacturer demonstrates some evidence of control
(either
> through process control or periodic testing). Leads with welding
operations
> or pressure contacts do not fall under that recommendation.
>
> DfR is now modifying our approach and we now recommend that NO tin-plated
> connectors be used unless physical barriers are present between leads/pins
> or the spacing between leads is at least 1000 to 2000 microns (driven by
> degree of risk aversion).
>
> ===================
>
> That's quite a recommendation!
>
> Bob Landman
> H&L Instruments, LLC
>
>
>
>
>
>
>
> ______________________________________________________________________
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