Toyota Slams Sudden Acceleration Research of Auto Expert as Unrealistic

Matthew Schwall, managing engineer of Exponent?s Vehicle Engineering, shows a rewired accelerator pedal in a video posted Mar 8, 2010 on Toyota?s website.

Toyota today issued a sweeping rebuttal to the findings of Professor David Gilbert, the auto expert who claimed in an ABC News report and in Congressional testimony to have found a possible problem in the electronics of Toyota cars that would mask the source of sudden acceleration.

In a press conference and demonstration broadcast on the internet, Toyota executives and engineering consultants asserted that Gilbert, who said that certain short circuits could cause sudden acceleration without generating an error message that would cause the car to decelerate, had created conditions that would not occur during the actual use of a car.


Toyota spokesperson Mike Michaels, in introducing the experts, said that Toyota 's demonstration would "do what Dr. Gilbert and ABC should have done before their rush to judgment."

VIDEO: The automaker says tests that linked runaway cars to electronics were flawed.
Toyota Insists No Electrical Problem

Dr. Shukri Souri, head of electrical and semiconductor research at Exponent, an outside engineering firm that has conducted safety tests for Toyota since being retained last year, said that Gilbert, an auto technology professor at Southern Illinois University, had essentially rewired the car to create an unrealistic condition.

"Dr. Gilbert provided no evidence that his scenario occurs in the real world," said Souri. "I can take a vehicle or appliance, determine what I want it to do and have it do that." Souri said what Gilbert had demonstrated was not evidence of a design flaw.

"It would be unreasonable for a manufacturer to design a strategy for modification that would not occur in the real world," said Souri.

Toyota spokesperson Mike Michels said that Exponent was able to conduct tests that replicated the short circuit in other vehicles besides Toyota, and that in those other vehicles, the same short circuit also did not produce an error message. "There is no suggestion of a defect in any of these vehicles," he said.

Souri also said that the short circuits induced by Gilbert were not likely to occur during the actual use of a vehicle, and that if corrosion or abrasion were to cause short circuits, there would be physical evidence of the problem in the vehicles.

According to Souri, none of the Toyotas inspected after sudden acceleration incidents showed any corrosion or physical defect in their electronic circuitry.


The presentation also called into question an ABC News internet video of Gilbert's demonstration, noting that an insert shot of the vehicle's tachometer was clearly taped while the car was parked with the doors open.


As reported on the Blotter last week, ABC News taped multiple demonstrations by Gilbert, and the shot of the tachometer that was recorded as the car was rolling was not originally used in the web video because of its shaky nature.

As noted by Exponent representative Matthew Schwall during Toyota's presentation, that shot can now be viewed on the updated clip at The engine's surge was comparable in all of the demonstrations performed by Gilbert as he induced the short.

Contacted by ABC News, Prof. Gilbert said he wanted to review the Toyota webinar further before offering detailed comment, and that he would visit Exponent to discuss the firm's findings.

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