http://online.wsj.com/article/SB1000...o&mod=yahoo_hs
The heart of Toyota's problem: Its secretive corporate culture in Japan clashed with U.S. requirements that auto makers disclose safety threats, people familiar with the matter say. The relationship soured even though Toyota had hired two former NHTSA officials to manage its ties with the agency.
Toyota's troubles spread Tuesday when it recalled all Priuses to address a braking problem, even as executives suggested the step was unnecessary.
Toyota acknowledges the rift with regulators. "Believe me, we have changed our mind-set," said Shinichi Sasaki, Toyota's quality chief, referring to a heated December confrontation in Tokyo with NHTSA officials over floor mats. "We don't believe this is going to be a problem in the future. We are completely on the same page with NHTSA."
Toyota's woes have roots in 2002's redesigned Camry sedan, which featured a new type of gas pedal. Instead of physically connecting to the engine with a mechanical cable, the new pedal used electronic sensors to send signals to a computer controlling the engine. The same technology migrated to cars including Toyota's luxury Lexus ES sedan. The main advantage is fuel efficiency.