"Other vehicle manufacturers have gone to great extremes," he said, to prevent the problem he claims to have found in the Toyotas. His tests on GM cars did not find a similar flaw, he said, "not even close."
Kane said the fact that the cars' onboard computers fail to detect the error could help to explain why Toyota has dismissed complaints from car owners about acceleration surges.
"We're hearing from consumers that Toyota tells them it can't possibly happen and if it did, it would set an error code. Well, in fact it doesn't," said Kane.
The company has maintained driver error, sticky gas pedals or pedals trapped by floor mats explain all of the thousands of reported incidents involving "runaway Toyotas."
In an interview with ABC News last month, the president of Toyota USA, Jim Lentz, said he was "confident" there was no electronic problem. Toyota has placed full-page advertisements in newspapers across the country making the same claim.