(October 4, 2010) Toyota said today thati ts  electronic throttle control did not cause unintended accleration.

A Toyota official said the auto company has investigated 4,000 vehicles whose drivers made complaints and found no evidence its electronic throttles were to blame.

“Toyota has not found a single case in which electronics would lead to sudden unintended acceleration,” Steve St. Angelo, Toyota’s North American chief quality officer, told reporters today. Toyota has reviewed 4,200 individual acceleration-related complaints so far, he said.

Customer complaints of sudden-acceleration incidents have dropped 80 percent since April, Toyota said in a statement.

The automaker said it has added so-called brake-override control to 84 percent of Toyota, Lexus and Scion vehicles now on sale in the U.S. and will be the first manufacturer to offer the safety technology across its lineup. The software is intended to ensure that should the accelerator become stuck, it will be shut off when the brake pedal is pressed.