Toyota Motor U.S. sales chief Jim Lentz is expected to deny that the carmaker's electronic throttle control systems are the cause of any unintended acceleration problems when he testifies before the Committee.

"We are confident that no problems exist with the electronic throttle control system in our vehicles," Lentz said in a prepared statement. "We have designed our electronic throttle control system with multiple failsafe mechanisms to shut off or reduce engine power in the event of a system failure."

http://money.cnn.com/2010/02/23/autos/Toyota_recall_hearing/