Product Design & Development

Toyota Dismisses CA Man's Runaway Prius Report

By ELLIOT SPAGAT - Associated Press Writers - Associated Press
Tuesday, March 16, 2010

 Share
[-] Text [+]  
Loading...

Toyota Dismisses CA Man's Runaway Prius Report

According to Toyota, safety tests done on James Sikes' vehicle contradict his police statments concerning his faulty gas pedal, stating that the scenario is not consistent with the technical findings.

Toyota Motor Corp. was quiet last week when James Sikes told reporters how the gas pedal got stuck on his 2008 Prius, leading him on a wild ride on a Southern California freeway.

Now the Japanese automaker is talking at length about how its tests don't support Sikes' version of events, and the driver is quiet.

Toyota says its tests showed the car's gas pedal, backup safety system and electronics were working fine. It was unable to replicate the stuck gas pedal that Sikes reported.

ADVERTISEMENT

The automaker said Monday that it found Sikes rapidly pressed the gas and brakes back and forth 250 times, the maximum amount of data that the car's self-diagnostic system can collect. That account appears to contradict Sikes' statements — backed by the California Highway Patrol — that he slammed the brakes, even lifting his buttocks off the seat.

Toyota officials said they believed Sikes hit the pedals lightly, which would have prevented a brake-override system from kicking in. Under the Prius design, engine power is cut if the brake pedal is pressed with moderate force.

Toyota stopped short of saying that Sikes fabricated his story.

"We have no opinion on his account, what he's been saying, other than the scenario is not consistent with the technical findings," spokesman Mike Michels said at a news conference.

The episode March 8 was among the highest-profile headaches Toyota has suffered in recent months. It recalled more than 8 million cars and trucks worldwide because gas pedals can become stuck in the down position or be snagged by floor mats. Dozens of Toyota drivers have reported problems even after their cars were supposedly fixed.

The company had no explanation for discrepancies with Sikes' account but confirmed the brakes were overheated and the pads worn. Bob Waltz, vice president of product, quality and service support at Toyota Motor Sales USA, said the front brakes were "metal to metal."

Toyota said it believes a CHP officer's account that he smelled burning brakes while guiding Sikes on the freeway. Officials said repeatedly pressing the pedal could have overheated the brakes but were unclear why the car didn't stop sooner than it did.

"That is the puzzling aspect of this," Michels said in an interview. "All we know are the engineering facts. We looked at all the components, they all work."

Toyota said its tests showed the car's electronics were working fine.

"If there were some kind of electronic problem, you would think it might actually stay permanent," Michels said. "When your TV goes on the fritz, when electronic stuff goes on the fritz, it doesn't just do it once and never do it again."

Sikes, 61, has said his car raced to 94 mph on Interstate 8 east of San Diego. He said he reached down with one hand to try to pull the pedal back, while keeping the other hand on the wheel. He called 911 but did not respond to repeated instructions from the dispatcher to throw the car into neutral.

The CHP officer eventually helped bring the car safely to a stop by telling him over a loudspeaker to hit the emergency brake and foot brake simultaneously.

Sikes spoke to reporters shortly after the incident but has since kept a low profile. He did not respond to phone messages Monday.

John Gomez, Sikes' attorney, said Monday that he would not comment on the episode until a government investigation was complete. Gomez has noted previously that Toyota has never been able to replicate stuck accelerator.

"This problem is sort of a ghost in the machine that is the Toyota system," he said Sunday. "It doesn't leave a fault code, it doesn't leave a footprint, and you can't make it happen upon demand."

The 2008 Prius is subject to a recall for floor mats but not sticky accelerators.

___

Krisher reported from Detroit. Associated Press Writer Ken Thomas in Washington contributed to this report.

JOIN THE DISCUSSION
Rate Article:  Average 3.5 out of 5
register or log in to comment on this article!

8 Comments

  • I own a 2009 Prius and putting it into Neutral while moving does the correct thing, it coasts with normal braking and steering (note that you have to hold the shifter in Neutral for about 1 second for it to do it). I also tried the 3 second power off at 1 MPH. 3 seconds is a very looooooong time to hold the button down. It then goes into Park (with a jolt as the car stops rolling) and then shuts off, no assisted braking or steering. I assume there is an upper speed where Park does not happen...

  • P.S. This is probably why they can't duplicate the failure mode.

  • Has anyone given any thought to the idea that the electronics on board the Prius may be susceptible to radio frequency interference (RFI)? It's entirely possible that on the day of Mr. Sikes' incident, he may have driven along side a semi-tractor trailer which was transmitting with a very typical 50-110 watt mobile radio. Or perhaps he was in the vicinity of a powerful broadcast transmitter. The engine electronics may very well have been placed in a mode from which the software was unable to recover. Recall that Mercedes had a problem with its first-generation anti-lock braking system which was traced to poor RF susceptibility performance. Any Ham radio operator knows how easy it is to trash your desktop or lap top computer with even moderate amounts of radio frequency energy. I've worked in the communications industry for nearly 40 years - I've seen this type of thing happen on numerous occasions. If RF susceptibility is the root of Toyota's problem, I'd say they first owe Mr. Sikes a formal public apology and then go work on their image for allowing fifth-rate engineering into a product upon which a life may depend.

  • The Toyota electronics are governed by an on-board computer that has numerous override functions that cannot be controlled by the driver. For example on my 2008 Prius I cannot engage the GPS navigation destination selection while the car is moving. I cannot sync up my Bluetooth cell phone once the car is moving. Anyone who has designed software and that includes firmware for chips is aware that error trapping is the most difficult and time consuming part of the effort. It is easy to make software that will function properly when the user does everything according to the design for the device. What is not easy is having routines that deal with user error or unexpected events. With a personal computer or even a DVD player like my Panasonic that will go into an unrecoverable error state that freezes the local and remote controls, the recourse is to cut all power and with a laptop that usually included removing the battery as well. This hard reset is not possible with a car that is in motion. In fact it is very difficult on the Prius to do it even with the car parked as the battery for the computer and car electronics is located in the rear of the car and the carpeting, spare tire, side cover, and other parts have to be detached, some with a socket wrench, before you can even get to the battery terminals to disconnect them. Toyota officials know this to be the case and are providing half-truths and outright lies to cover their respective asses and their jobs. I can put my Prius into neutral by holding the lever the entire time and using just one hand on the steering wheel which in an emergency is not really feasible. Not only Toyota though has had these sorts of computer problems as the 2001 Jaguars had a common security system malfunction that caused the car to become disabled as though it had been stolen and it is really fun to have your car's engine suddenly die when you are doing 70mph in the left lane of the freeway. Happened 6 times to my friend's car and

  • I own a Prius and putting it in neutral or trying to turn it off has no effect as long as the car is moving.

  • Computers are not televisions
    The Toyota spokesman, Michaels, expects that broken electronics should stay broken (where did he come from?) Even with tube radios and TVs, you would slap a certain way to fix them. How often has your computer crashed, but it was fine when you powered it up again? When you get a serious safety complaint from a user about some oddball-sounding problem for the first time, a responsible engineer tries to understand what could have gone wrong. Then when he isn't quite smart enough or runs out of time to do that, he tries to find out what the user could have done to make the machine fail the way it did. With the second or third independent user with the same complaint, it is already time for a task force approach to solve the problem. IT REALLY EXISTS! One can even calculate its probability of failure given the number of vehicles, the hours of operation and the number of failures experienced. The probability will be much less than one in a million. Rooting out the cause is just like finding a needle in a hay stack. But when people's lives, and even the lives of whole families hang in the balance, responsible engineers will not try to blame the dead.

  • Subject line in my email from PDD: Toyota Says Driver Is Lying
    Statement from article: Toyota stopped short of saying that Sikes fabricated his story
    Which is it!!
    I expect you will be hearing from both Toyota and Mr Sykes legal team shortly.
    Do you really need to blow your headlines out of proportion to get people to resd your articles?

  • There have been a number of articles recently posted about Mr. Sikes stating that he has filed for bankruptcy at least twice, the latest being in 2008, in which he listed the Prius as a liability. Mr. Sikes was afraid to put the car into neutral or even turn it off, but he wasn't afraid to reach down to the accelerator pedal and try to pull it up. Anyone ever tried that? It is pretty much impossible sitting in a car unless you have arms like an orangutang. Anyone smell something fishy yet? I also assume the Mr. Gomez is an expert in the electronics involved as well.

Add Comment

Text Only 2000 character limit

Page 1 of 1

At Issue

Risky Business: Funding Medical Device Innovation
Rahul Sathe, Principal Mechanical Engineer, Surgical and Interventional Products, Cambridge Consultants
Extracting Nuggets from the Invention Mine
Tom Tuytschaevers, a member of our Patent Practice Group

Site Sponsors


Most Viewed

Videos & Webcasts

Visualizing Video at the Speed of Light: One Trillion Frames Per Second 2/9/2012
MIT Media Lab researchers have created a new imaging system that can acquire visual data at a rate of one trillion frames per second.   Continue
The Energy Miser Concept Home 2/8/2012
Lower energy bills while making the house more comfortable, quieter, and safer? Who cares when you're demonstrating a completely Apple-based home control and automation system.   Continue
Inside the Audi A7 2/8/2012
When you take a look at the GPS system, you see real-time Google Earth 3D image navigation rather than cartoon-colored maps. It also powers the night vision system which includes a thermal camera to help detect pedestrians.   Continue

Top Stories and Headlines
EVERY DAY!

FREE Email Newsletter