Toyota Motor Corp. President Akio Toyoda said Wednesday the automaker has confirmed its electronic throttle-control system is not defective, in a bid to ease mounting concerns in the United States that the system may have caused sudden acceleration incidents.

Toyoda also said he has no plans to appear before a U.S. congressional hearing planned Feb. 24, which Toyota Motor North America Inc. President Yoshimi Inaba will attend. Earlier reports said Toyoda would visit the U.S. in March.

It was the third time in the past two weeks that Toyoda has faced journalists, amid mounting criticism that the auto giant has been slow to react to the massive recalls and accident claims.