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A person briefed on the matter says Toyota will cast doubt on a California man's claim that his Prius sped out of control.

The person says the automaker will show that a backup safety system worked properly. The person didn't want to be identified because the information will be released at a news conference later Monday.

The person also says Toyota will show that damage to the Prius brakes was inconsistent with driver James Sikes' story. Sikes says his car raced to 94 mph (150 kph) on a freeway near San Diego.

The March 8 incident ended when Sikes stopped the car with help from a California Highway Patrol officer.