new Yaris 2009 sedan, 1 month old - problems already?

[Frankd1]

I believe there is a noise associated with the ABS system going through a self test....

After you start the car and drive off there is something like a spring snapping sound that is slightly metallic but subtle and somewhat muffled. if that is what you are hearing then it is more than likely the brake ABS system going through its self test. Some cars it is louder than others and some cars it is hard to detect.