NHTSA Complaint #10369959 — 2009 TOYOTA COROLLA

I HAVE TWO RELATED CONCERNS ABOUT THE 2009 COROLLA S WITH TRACTION AND STABILITY CONTROL. IT IS MY BELIEF THAT THERE IS AN UNRESOLVED SOFTWARE ISSUE WITH THE ABS / STABILITY SYSTEM. I NOTICED THE FIRST ISSUE AT ONLY 6000 MILES, RIGHT AFTER MY SECOND SERVICE AT THE TOYOTA DEALER. THEY PERFORMED THE BRAKE MANIFOLD RECALL RELATED TO NHTSA CAMPAIGN ID NUMBER: 09V338000 DURING THAT SERVICE. THE FRONT BRAKES BEGAN TO SHAKE VIOLENTLY DURING BRAKING FROM 65 MPH. IT FELT LIKE THE ROTORS WERE SEVERELY WARPED WHEN THIS OCCURRED. THIS DOES NOT OCCUR EVERY TIME. THE TOYOTA DEALER EXAMINED THE VEHICLE AND THEY STATED THEY COULD NOT FIND ANY ISSUES AND WOULD NOT TEST THE VEHICLE ABOVE 55 MPH. EACH TIME I TOOK THE VEHICLE IN FOR A SCHEDULED SERVICE, THE PROBLEM WOULD SUDDENLY GET WORSE AGAIN. THEY LIKE TO TIGHTEN THE REAR BRAKES EACH TIME. I ASKED THEM TO LEAVE THE REAR BRAKES ALONE AND DID NOT SEE THE NORMAL AGGRAVATION OF THE FRONT DISK PULSATION ISSUE. I DO STILL SEE SEVERE VIBRATION PERIODICALLY. THIS SYMPTOM APPEARS TO OCCUR MOST WHEN THE AMBIENT EXTERNAL TEMPERATURE IS LOWER THAN 2 DEGREES BELOW FREEZING AND ALL THE LIGHTS ARE FULLY LIT. DUE TO THE SPORADIC NATURE OF THE VIBRATION, MY CONCERN IS THAT THE ABS SYSTEM IS UNABLE TO KEEP UP OR THERE IS A VOLTAGE FLUCTUATION WITH ALL THE LIGHTS ON THAT TRIGGERS THE SYSTEM TO PULSE THE BRAKES INTENTIONALLY. I HAVE FOUND OTHERS ARE SEEING THE SAME TYPE OF ISSUE AND NOTICED THAT YOU HAVE A SIMILAR REQUEST ODI ID NUMBER: 10359202 FROM SOMEONE THAT HAS THE SAME YEAR AND MODEL WITH MANY IDENTICAL VIN NUMBER DIGITS. I CURRENTLY HAVE THE ORIGINAL PARTS ON THE VEHICLE, IF YOU NEED TO INSPECT THEM. MY SECONDARY CONCERN OCCURRED WHEN I TESTED THE EMERGENCY (HAND) BRAKE ON A LONG STRAIGHT ROAD. THE STABILITY CONTROL SYSTEM THREW THE VEHICLE FROM SIDE TO SIDE VIOLENTLY WHICH COULD EASILY CAUSE COMPLETE LOSS OF CONTROL. THIS APPEARS TO BE A SOFTWARE ISSUE DUE TO AN 'UNFORESEEN' BUT PLAUSIBLE CONDITION. *TR