I WAS DRIVING AT 2 OR 3 MPH IN HEAVY TRAFFIC ON A CITY STREET AND THE CAR ACCELERATED WHEN I TOUCHED THE BRAKE. PRESSURE ON THE BRAKE PEDAL WOULD NOT STOP THE VEHICLE AND IT CRASHED INTO THE CAR AHEAD, PUSHING IT INTO THE SECOND CAR AHEAD. EVENTUALLY THE RPMS DROPPED AFTER THE COLLISION. FAULT CODE SHOWED HEADLAMP MODULE (TIPM)