Bob:
One word - Awesome!
Now, if just those who make foolish laws to impose lead-free in products that we actually rely upon would look at this information to consider the folly of their previous decisions.
Gregg Owens
(Personal Opinion)
________________________________________
From: TechNet [[log in to unmask]] On Behalf Of Bob Landman [[log in to unmask]]
Sent: Friday, March 19, 2010 11:15 AM
To: [log in to unmask]
Subject: [TN] RoHS and T-----
There are several aspects of this topic which deal with good design
practices which, I trust, are germain to this forum. In particular
the board design of the Prius multiple function display, it's
connectors, CE bus and hairline cracks in the RoHS solder.
> As so many of you have requested the Toyota documents, I set up a
> web folder at this link http://www.hlinstruments.com//RoHS_articles/
>
> They are in the Toyota folder.
>
> If you find other articles on this subject, please send me the links
> or the articles and I'll add them to the folder.
>
> -Bob Landman/H&L Instruments, LLC
>
> I'm not an expert on automobiles. FYI, I have two cars, a 2007
> Volvo XC70 and a 1992 Jaguar XJ6. No Toyotas. Yes, I know the Jag
> has Lucas electrics aka "Home before dark" :-) but it's been very
> reliable (has over 100,000 miles on it). British Racing Green is the
> color (of course). I added the leaping jaguar to the hood; goes
> much faster now :-) Used to have a 1953 Aston Martin DB2 but that's
> a story for another day.
>
> Note to John Burke: Be VERY careful about installing a "KILL"
> switch in your Toyotas! If you shut off the engine fuel you'll lose
> power steering.
> It seems to me from studying Dr. Gilbert's report, what you could do
> (and this will take testing) is to have the switch disable the
> signals from the ECM (electronic control module) to the servo that
> increases fuel flow. You want to keep the engine running, you just
> want to stop the acceleration.
>
> http://www.thetruthaboutcars.com/exclusive-ttac-takes-apart-both-toyota-gas-pedals/
> (good pictures of the pedal assemblies)
>
> Video of a discussion about the assembly http://www.autoblog.com/2010/01/29/video-in-depth-look-at-toyotas-sticky-accelerator/#continued
> (keep in mind this is an early video as it states the recall is
> just 2 million vehicles and now we are over 8 million vehicles being
> recalled.
>
> Professor Gilbert’s preliminary report describes the conditions he u
> sed to introduce a “resistive short” within a Toyota Accelerator
> Pedal Position
> (APP) sensor so as to produce unintended acceleration. Downloaded it
> from http://www.safetyresearch.net/Library/Preliminary_Report022110.pdf
> to the web folder.
>
> My, how nice of Toyota to actually video demonstrate Gilbert’s proce
> ss for the world to see (see Part II below). How lovely of them to s
> tate that to produce Gilbert’s scenario requires an ohmic short of s
> ome 200 ohms to 1000 ohms. And then lovelier still for them to illu
> strate how “resistive shorts” intentionally introduced in a
> number of APP modules used in different make of car can result in th
> e same kind of unintended acceleration.
>
> Marvelous!!!!
>
> But how foolish Toyota looks, don't you agree, as they proclaim that
> Gilbert’s scenario cannot possibly happen in their products? Trying
> to make it seem as if a “resistive short” from 200 ohms or so
> cannot exist. We know that's utter nonsense and it reflects badly o
> n Toyota, don't you think?
>
> Judge for yourselves what level of incompetence Toyota is displaying
> in this rebuttal video.
>
> Part II http://www.youtube.com/watch?v=XWr2EuyZ_h4&NR=1 (start
> with this to witness laboratory induced unintended acceleration)
>
> Part I http://www.youtube.com/watch?v=lkWhkU4coa4
>
> ========================
>
> I stumbled onto something on Google. A detailed analysis of the
> failed display unit on a Prius. Its an excellent article as it
> dives deep into what's in todays' automotive electronics. The
> writer ultimately finds the problem and fixes it. Toyota wanted
> $2000+ for a replacement unit (as the writers unit was out of
> warranty). Do you think that's a fair price? Read the article and
> decide for yourself. Hint: RoHS is likely the cause.
>
> I found this article http://www.techno-fandom.org/~hobbit/cars/mfd/compare.html
>
> Which lead me to this http://www.techno-fandom.org/~hobbit/cars/
> mfd/ titled "Evaluation and repair of a failed Prius MFD"
>
> The writer added this http://www.techno-fandom.org/~hobbit/cars/mfd/compare.html
>
> This is the Prius chat forum
> http://priuschat.com/forums/gen-ii-prius-care-maintenance-troubleshooting/33923-mfd-issues-04-05-prius.html
>
> I searched on the forum for "acceleration" and found 259 postings!
> http://priuschat.com/forums/gen-ii-prius-care-maintenance-troubleshooting/61226-help-diagnosing-unintended-uncommanded-acceleration-issue.html
>
> this article was at the top "Diagnosing Unintended/Uncommanded
> Acceleration Issue"
>
> My 2006 Prius (pkg 8) has on several occasions decided to accelerate
> on its own. This always happens when the car is stopped. Lifting my
> foot from the brake causes the car to accelerate as fast as it can.
> Up until yesterday I wasn't totally sure my senses weren't lying. I
> had read a couple of articles where people complained of this
> problem. In the earlier cases, I was stoped at a flow control light
> on a freeway ramp, so the rapid acceleration wasn't a problem and
> when I stepped on the gas, it stopped.
>
> Yesterday I was on a surface street and stopped at a light. When I
> gently lifted my foot from the brake to start the car rolling, the
> car revved the ICE and acted as though I had floored the accelerator
> (my foot was still on the brake and I hadn't released full pressure
> yet. When I pushed hard on the brake, the car stoped and the ICE
> stopped reving, repeating gently easing up on the brake made the
> same thing happen again.
>
> Needless to say, I was getting concnerned. I tried shifting to
> neutral (no
> deal) and finally turned the cruise control on and then off (it was
> off).
> This stopped the acceleration. I have made a service appointment,
> but the dealer claims they never heard of this problem before.
>
> I did some research on the Web (search Prius unintended acceleration
> incidents) and discovered this has happened more than a few times
> for others. According to my reading, Toyota has denied the problem
> and claimed the floor mat was pressing on the gas. In my case, the
> first thing I did is check my mat (heavy rubber that never moves)
> and it was safely tucked under the pedals.
>
> If there is a fix for this, I haven't seen mention of it. I did
> report it to the NHTSA. I will report on the dealer's response. In
> the meantime be aware this has been happening on 2004 - 2008 cars.
> Some of the reports claim it is a cruise control issue. Who knows?
>
> I will be most interested to see how Toyota responds.
>
> ====================
>
> Bob Landman
> H&L Instruments, LLC
>
>
>
>
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