2017 TOYOTA COROLLA Vehicle Speed Control Problems

Recently purchased a used 2017 Toyota Corolla. During the test drive I did not attempt to use the cruise control as it was only driven on city or small highways. Travel with the car at those locations has been good. Yesterday while on a freeway, I used the cruise control. It started out okay, but when I got to a downhill or uphill location, the car engine got very loud. The rpm’s revved to an extremely high level and the car accelerated and kept accelerating beyond the cruise set speed. I became very scared and didn’t know what was happening. Luckily I had quick thinking to hit the brakes immediately. I actually pulled over and stopped due to the issue and my nerves. The engine looked okay so once calmed, I began traveling again. I wanted to use the cruise on the freeway, so attempted a second time later. The same exact thing happened in the uphill / downhill scenario. I realized there is something wrong and it is not a good issue at all! This morning I began researching things related to the car. Prior to my purchase, I had checked for any outstanding recalls (which there were none) and problems people may have had with this car. There were no general concerning things I saw. This morning I began searches specific to cruise control issues and found discussions and even videos pertaining to cruise problems. People mention an array of scenarios and possible reasons such as the brake pedal sensor not working. Then I came across this site where other people described the same exact problem and safety concern of mine. I agree with all of them that it is definitely scary and thank goodness the brake works otherwise it would be a MAJOR safety concern!! I am now concerned and wondering why after many people have problems with this, there is not a fix or something being done?

The contact owns a 2017 Toyota Corolla. The contact stated that while driving at an undisclosed speed, the engine revved and the vehicle experienced unintended acceleration. The vehicle crashed into a concrete barrier while turning into a parking space. The contact was not able to depress the brake pedal in time to stop the vehicle. No air bags were deployed. No injury was sustained and no medical attention was received. A police report was filed. The vehicle was towed to a body shop; however, the vehicle was not diagnosed nor repaired. The vehicle was not deemed totaled by the insurance company. The manufacturer was not made aware of the failure. The failure mileage was approximately 55,000.

Mileage: 55,000

Vehicle went out of control in regards of speed when traveling downhill with cruise control on. Vehicle began heavily decelerating and accelerating along with high engine rpm. This is extremely dangerous and I am unable to use cruise control because of it.

I HAD TO DRIVE AROUND 600 MILES TO AND FROM FAMILY FUNERAL. AS OTHERS HAVE REPORTED THE CRUISE CONTROL ON A DOWN HILL SLOPE GOES OUT OF CONTROL. AS I REACHED THE TOP OF A HILL AND STARTED DOWN THE CRUISE CONTROL WOULD ACCELERATE TO 4000 RPM ( IT IS REALLY LOUD) THE SPEED WOULD START INCREASING AND GO 15-20 MPH OVER WHAT THE CRUISE CONTROL SPEED WAS SET AT. I HAD TO TURN OFF THE CRUISE CONTROL TO REGAIN CONTROL OVER THE SPEED. I WAS AFRAID THAT SOMETHING MIGHT HAPPEN IF I DID NOT. WHERE IT SEEMED MY CAR SHOULD DOWN SHIFT IT WAS NOT. SOMETHING IS WRONG WITH THE PROGRAMMING OF THE CRUISE CONTROL. THIS SHOULD NOT HAPPEN ON A DECLINE. ALSO, AT ONE POINT WHEN I WAS IN THE LEFT LANE AND A CAR PASSED ME ON THE RIGHT, MY CAR SLOWED DOWN REALLY QUICKLY. IF SOMEONE HAD BEEN BEHIND ME IT COULD HAVE CAUSED A SERIOUS ACCIDENT. THIS IS MY FOURTH TOYOTA AND I HAVE NEVER HAD THESE PROBLEMS BEFORE.

WHEN GOING DOWN HILL, THE CRUISE CONTROL RACES THE ENGINE INTO HIGH RPM (4000+ RPM) RATHER THAN SLOWING THE ENGINE AND CONTROLLING THE CAR SPEED. IT HAS DONE THIS SINCE IT WAS NEW.

Mileage: 1,000

WHEN CRUISE CONTROL ENGAGED, IF IT HITS A LEVEL OR DOWN HILL IT APPEARS TO DOWN SHIFT, BUT CONTINUE TO SPEED UP. IT SHOULD JUST REDUCE THE FUEL TO SLOW DOWN. THIS APPEARS TO BE A PROGRAM PROBLEM. THIS HAPPENS AT ALL SPEEDS. IT WAS BOUGHT USED FROM A TOYOTA DEALER. I HAVE NOT ASKED THE SERVICE DEPARTMENT YET.

Mileage: 72,310

WHILE DRIVING DOWN A DOWNGRADE WITH THE CRUISE CONTROL ENGAGED AND SET TO 65MPH, THE CVT TRANSMISSION DOWNSHIFTS, THE RPMS INCREASED AND THE VEHICLE ACCELERATED TO WELL OVER THE SPEED LIMIT. IT FELT LIKE I WAS LOSING CONTROL. I HAD TO ACTIVATE THE BRAKES TO DISENGAGE THE CRUISE CONTROL IN ORDER TO REDUCE MY SPEED TO BELOW THE POSTED SPEED LIMIT. I TRIED IT AGAIN ON ANOTHER DOWNGRADE AND THE SAME SITUATION WAS DUPLICATED. THE CAR WILL ALSO ENGAGE RPMS WHEN YOU ARE DOWNGRADING OR UPGRADING IN CRUISE CONTROL I DID NOT TAKE THE CAR INTO A DEALER SINCE THE ISSUE HAS BEEN REPORTED TO DEALERSHIPS WITH A SOLUTION TO THIS PROBLEM.

Mileage: 50,000

WHEN GOING DOWNHILL ON CRUISE CONTROL MY COROLLA'S RPM'S GO UP TO 5000 AND INSTEAD OF KEEPING STABLE SPEEDS IT INCREASES THE SPEEDS. I FEEL LIKE I CAN'T CONTROL MY VEHICLE WHEN THIS HAPPENS. THIS IS A HUGE SAFETY ISSUE. I'M NOT SURE IF SOMETHING NEEDS TO BE RE-PROGRAMMED BUT I'VE SEEN SO MANY COMPLAINTS ON THIS ISSUE. I WOULDN'T BE SURPRISED IF A WRECK HAS HAPPENED BECAUSE OF THIS. TOYOTA NEEDS TO BE FORCED TO FIX THIS ISSUE BEFORE SOMEONE SERIOUSLY GETS HURT OR DIES.

Mileage: 48,235

DISAPPOINTED WITH TOYOTA ON THIS, LAST ONE I WILL PURCHASE IF THEY ARE UNABLE TO PROVIDE A FIX! WHILE IN MOTION ON EVERY OCCASION THE CRUISE CONTROL IS ENGAGED AND THE VEHICLE IS ON A DECLINE THE CRUISE CONTROL DOES NOT MAINTAIN THE SET SPEED. THIS IS THE FIRST TIME OF 4 OTHER COROLLA'S I HAVE OWNED THAT RESPONDED LIKE THIS. DEPENDING ON THE SEVERITY OF THE DECLINE THE SPEED WILL INCREASE FROM 5 TO 15 MPH AND THE ENGINE REVS TO 4,000 RPMS IN AN ATTEMPT TO MAINTAIN SPEED. ADAM'S TOYOTA DEALERSHIP HAS STATED THAT THIS IS A NORMAL OCCURRENCE FOR ALL 2017 COROLLA'S CVT'S AND I MAINTAIN IT'S NOT AND CRUISE IS USELESS THEREFORE I SHOULD BE REIMBURSED. THE CRUISE CONTROL IN ALL OTHER VEHICLES (PRIOR COROLLA'S AND OTHER MAKES) I HAVE OWNED HAS MAINTAINED A CONSISTENT SPEED NO MATTER THE ROAD BEING TRAVELED. SINCE I HAVE OWNED THIS VEHICLE THIS ISSUE HAS OCCURRED EVERY TIME I HAVE ENGAGED THE CRUISE CONTROL. OTHERS ONLINE HAVE COMPLAINTS ON THIS ISSUE AS WELL. TOYOTA PLEASE PROVIDE FIX

THE CVT TRANSMISSION MAKE A SOUND UNKNOW THE DEALER SAY ME THAT IS ALL NORMAL IN THE CAR FOR ME IS NOT NORMAL OTHER CARS CONTAIN CVT TRANSMISSION AND THIS SOUND NOT MAKE IN OTHERS CVT TRANSMISSION IS MORE MAKING SOUND IN CLIMB AND WHEN ON AIR CONDITIONER

Mileage: 1,079

WHILE COMING OUT OF A REVERED POSITION, I WAS DRIVING FORWARD AND MY BRAKES VIBRATED. THIS CAUSED MY CAR TO STALL WHILE IN THE DRIVING POSITION.

Mileage: 12,250

RED BRAKE LIGHT, ABS, VSC, POWER STEERING, AND MIL LIGHTS CAME ON. DTC'S U0129.

Mileage: 13,192

AS OTHERS HAVE REPORTED THE CRUISE CONTROL ON A DOWN HILL SLOPE GOES OUT OF CONTROL. AS I REACH THE TOP OF THE HILL AND START DOWN THE CRUISE CONTROL WILL ACCELERATE TO 4000 RPM AND THE SPEED WILL INCREASE 10-15 MPH OVER WHAT THE CRUISE CONTROL IS SET AT. I MUST TURN OFF THE CRUISE CONTROL TO REGAIN CONTROL OVER THE SPEED. SOMETHING IS WRONG WITH THE PROGRAMMING OF THE CRUISE CONTROL. ON DOWN HILL THE CRUISE CONTROL SHOULD BE REDUCING FUEL TO MAINTAIN SPEED NOT INCREASE IT. I AM A POLICE OFFICER AND THIS CRUISE CONTROL IS A HAZARD.

Mileage: 38,000

WHILE DRIVING DOWN A DOWNGRADE WITH THE CRUISE CONTROL ENGAGED AND SET TO 65MPH, THE CVT TRANSMISSION SEEMED TO DOWNSHIFT, THE RPM'S INCREASED AND THE VEHICLE ACCELERATED TO WELL OVER THE SPEED LIMIT. IT FELT LIKE I WAS LOSING CONTROL. I HAD TO ACTIVATE THE BRAKES TO DISENGAGE THE CRUISE CONTROL IN ORDER TO REDUCE MY SPEED TO BELOW THE POSTED SPEED LIMIT. I TRIED IT AGAIN ON ANOTHER DOWNGRADE AND THE SAME SITUATION WAS DUPLICATED. I DID NOT TAKE THE CAR INTO A DEALER SINCE THE ISSUE HAS BEEN REPORTED TO DEALERSHIPS WITH A SOLUTION TO THIS PROBLEM.

BOUGHT THE CAR LAST APRIL, IT HAS GIVEN ME NO PROBLEMS, UNTIL NOW. THE CAR START TO LOOSE ACCELERATION WHEN DRIVING ALMOST GOT INTO TWO CAR ACCIDENT ON THE ROAD, CALLED TOYOTA BUT THEY WANT TO CHARGE ME TO INSPECT THE CAR, THE CAR SEEMS TO BE STUCK ON GEARS LIKE IF IT WAS ON NEATRUAL.

Mileage: 39,000

WAS DRIVING IN MIDDLE LANE OF INTERSTATE 10 WHEN VEHICLE LOST POWER. CAR WOULD NOT ACCELERATE. CAR COASTED FOR APPROX. 5 MINUTES. HAD TO PUT ON EMERGENCY FLASHER, PUT CAR IN PARK TO RESTART ENGINE. CARS COMING UP BEHIND ME DOING 75/80/85 MILES PER HOUR AND HAD TO SWERVE IMMEDIATELY TO KEEP FROM HITTING MY VEHICLE. I HAD A FRIEND IN PASSENGER SEAT AND WE WERE BOTH SCARED FOR OUR LIVES. TO THIS DAY, I AM AFRAID TO DRIVE ON INTERSTATE OR ANY OTHER BUSY HIGHWAY BECAUSE TOYOTA SAID THEY COULD NOT FIND ANY PROBLEM.

Mileage: 28,200

ADAPTIVE CRUISE CONTROL CAUSES THE CAR TO DOWN-SHIFT UNNECESSARILY ON A STRAIGHT DOWNHILL GRADE AND SOMETIMES INCREASES THE SPEED BY AS MUCH AS 8-10 MPH. I FEEL OUT OF CONTROL, WHICH IS DANGEROUS. A TOYOTA TECHNICIAN HAS CONFIRMED THE SAME BEHAVIOR ON ANOTHER 2017 COROLLA. ON ONE OCCASION, ON A FREEWAY DOWNHILL WHERE THE SPEED COULD HAVE EASILY BEEN CONTROLLED BY LETTING OFF THE GAS, THE CAR DOWNSHIFTED TO D3, REVS WENT TO ABOUT 4000, AND THE SPEED INCREASED TO 70MPH - WHEN IT WAS SET TO ABOUT 62. ON ANOTHER OCCASION, ON A RELATIVELY FLAT, STRAIGHT FREEWAY ROAD, IT AGAIN DOWNSHIFTED FOR NO APPARENT REASON, AND THE SPEED AGAIN INCREASED OVER THE SET SPEED (OF COURSE THE REVS WERE HIGHER AGAIN). IN BOTH OF THE ABOVE CASES, THERE WAS NO CAR OR OTHER OBSTACLE IN FRONT OF ME THAT SHOULD CAUSE THE CAR TO SLOW DOWN. I'VE SEEN THE ADAPTIVE CRUISE RESPOND TO A CAR TOO CLOSE SO KNOW HOW THAT FEELS.

Mileage: 1,600

MY CAR WAS STRUCK BY A CAR SPINNING OUT OF CONTROL MAINLY THE DRIVERS SIDE DOOR CENTER POST AND REAR DOOR. I THINK THE CAR IS TOTALED. THE PASSENGER REAR WHEEL IS BENT FROM THE IMPACT. NONE OF THE AIR BAGS DEPLOYED. THE POLICE OFFICERS THAT WORKED THE ACCIDENT WAS ASTONISHED. HE SAID THEY SHOULD HAVE DEPLOYED. MY CAR WAS MOVING ABOUT 15MPH THE CAR THAT HIT MINE WAS SPINNING VERY FAST. THE ROADS WERE SLICK AND IT WAS RAINING. THE IMPACT WAS ABOUT 40 TO 60MPH AT LEAST.

Mileage: 60,000

THE CRUISE CONTROL IS JUST AWFUL AND HAS BEEN SINCE I BOUGHT THE CAR BRAND NEW IN DECEMBER 2016. JUST AS SEVERAL OTHERS HAVE DESCRIBED, IT CANNOT CONTROL THE SPEED WHEN GOING DOWN HILL. IT RAISES THE RPM'S TRYING TO SLOW THE CAR DOWN, BUT IT ISN'T VERY EFFECTIVE. I'VE NEVER HAD ANOTHER CAR OR ANOTHER TOYOTA HAVE SUCH POOR SPEED CONTROL. SO MUCH, THAT I DON'T EVEN BOTHER TRYING TO USE IT ANYMORE. A COP ISN'T GOING TO LISTEN TO "MY CRUISE CONTROL WASN'T WORKING RIGHT" IF I GET PULLED OVER. THE BRAKES ALREADY FEEL LIKE THEY ARE WEARING OUT AT 26K MILES. MY 13 CAMRY HAD 30K AND THE BRAKES STILL FELT BRAND NEW. SAME WITH THE 15 SENTRA I HAD. THE SUSPENSION FEELS ROUGHER AND IS STARTING TO MAKE NOISES ALREADY. THIS CAR SHOULDN'T FEEL LIKE IT HAS 60K MILES ON IT ALREADY.

Mileage: 500

THE VEHICLE DOES THIS 100% OF THE TIME. WHEN ON THE ADAPTIVE CRUISE CONTROL ON THE INTERSTATE THERE ARE OCCASIONS WHERE THE CRUISE WILL GO 14 MPH ABOVE THE SET LIMIT AND THE ENGINE IS AT 4000 RPM OR HIGHER. I TYPICALLY DRIVE AT 65 MPH ON THE INTERSTATE; THIS IS CAUSING ME TO GO TO OVER 75 MPH WHILE THE SYSTEM IS TRYING TO RECOVER BACK TO 65MPH. I ALSO OWN A 2017 TOYOTA RAV4 AND DRIVE THE SAME ROADS; THE CRUISE IS 'ROCK STEADY'. IT HOLDS AT A CONSTANT 65MPH.

Mileage: 2,000

CAR SPEEDS UP AT STOP OR LOW SPEEDS ON HIGHWAY AND STREETS STOP AND GO TRAFFIC

Mileage: 1,700

ON INTERSTATE IN WESTERN MARYLAND AND WEST VIRGINIA, ROAD CURVES TO LEFT, GOING UPHILL (STEEP) AT 70 MPH AND 4000+ RPM IN DRIVE, 3 LANES, TRUCK IN "SLOW" RIGHT LANE (40MPH), COROLLA IN MIDDLE LANE, LEFT LANE EMPTY. SAFET SENSE "SEES" TRUCK AND HITS BRAKES. NO ONE BEHIND, THANKS. POSSIBLE REAR END COLLUSION. SERIOUS SAFETY FAULT. DIFFICULT FOR COROLLA TO REGAIN SPEED. DOES NOT HAPPEN ON RIGHT CURVE AS THOSE VEHICLES IN LEFT LANE ARE MOVING FASTER THAN COROLLA.

Mileage: 6,200

THE VEHICLE WAS TRAVELING IN THE LEFT LANE OF A DIVIDED 4 LANE HIGHWAY AT A SPEED OF 55 MPH WITH THE SPEED CONTROL AND RADAR ENGAGED. THE ROAD CURVED SLIGHTLY TO THE RIGHT. THE VEHICLE APPROACHED A CAR STOPPED IN THE LEFT TURN LANE IN THE MEDIAN - NOT IT THE LANE OF TRAVEL. DUE TO THE CURVATURE OF THE ROAD, THE RADAR DETECTED THE STOPPED VEHICLE AND APPARENTLY BELIEVED IT TO BE IN THE PATH OF TRAVEL. THE RADAR/SPEED CONTROL SOUNDED ITS "COLLISION ALARM" AND RAPIDLY DECELERATED APPROXIMATELY 10 - 15 MPH BEFORE I COULD DISENGAGE IT AND REGAIN CONTROL. HAD THERE BEEN A VEHICLE FOLLOWING ME THIS COULD HAVE RESULTED IN A COLLISION AS A FOLLOWING DRIVER WOULD HAVE SEEN THAT THE LANE OF TRAVEL WAS CLEAR AND WOULD HAVE NO REASON TO EXPECT MY VEHICLE TO SUDDENLY DECELERATE. I HAVE EXPERIENCED SIMILAR ISSUES WHEN A VEHICLE IN FRONT OF ME TURNS RIGHT OR LEFT AT AN INTERSECTION. I CAN SEE THAT THE VEHICLE IS TURNING AND I KNOW HOW LONG IT WILL TAKE TO CLEAR THE TRAVEL LANE. THE RADAR SPEED CONTROL SYSTEM SEEMS TO DETECT THE SLOWING VEHICLE BUT TAKES A LONG TIME TO PROCESS WHAT IS HAPPENING. THE SPEED CONTROL WILL ABRUPTLY DECELERATE THE VEHICLE AFTER THE TURNING VEHICLE IS WELL OUT OF THE INTERSECTION. AGAIN, THE SUDDEN DECELERATION WITHOUT APPARENT TRAFFIC CONDITIONS TO WARRENT SUCH ACTION ARE A HAZARD TO THE VEHICLE AND ANY FOLLOWING VEHICLES. I TOOK THE VEHICLE TO THE SERVICE DEPARTMENT AT AT TOYOTA OF GOLDSBORO (NC) ON OCTOBER 23, 2017. THEIR OPINION WAS THAT THE SPEED CONTROL/RADAR WAS "OPERATING AS DESIGNED."

Mileage: 1,500

SPEED CONTROL ENGAGED GOING DOWNHILL ON HIGHWAY AT 60 MPH - CAR ACCELERATES VERY QUICKLY TO OVER 70 MPH AND THE TAC GOES TO 4500. TO DISENGAGE I EITHER TURNOFF SPEED CONTROL OR BRAKE. THIS HAPPENED FOUR TIMES TODAY. I HAVE NEVER HAD A TOYOTA ACT LIKE THIS. USUALLY SPEED CONTROL MAINTAINS THE SPEED UPHILLL OR DOWNHILLL IN A VERY SMALL RANGE AND NEVER RACES THE ENGINE. THIS IS VERY DANGEROUS AND I WILL NOT USE SPEED CONTROL UNTIL I CAN GET THIS FIXED. TAKING TO TOYOTA MONDAY. I NOTICED THAT THERE ARE QUITE A FEW COMPLAINTS ON THE INTERNET ABOUT THIS EXACT PROBLEM.

Mileage: 700

TL* THE CONTACT OWNS A 2017 TOYOTA COROLLA. THE CONTACT STATED THAT WHILE THE CRUISE CONTROL WAS ACTIVATED AT 65 MPH, THE DYNAMIC RADAR FEATURE ACTIVATED VIOLENTLY. THERE WAS NO VEHICLE IN FRONT OF THE CONTACTS VEHICLE AT THAT TIME THAT SHOULD HAVE ACTIVATED THE DYNAMIC RADAR. THE DEALER (TOYOTA OF EASLEY, 5643 CALHOUN MEMORIAL HWY, EASLEY, SC 29640, (864) 855-2233) WAS NOTIFIED. THE MANUFACTURER WAS ALSO NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 700. *LN *TR

Mileage: 700

I JUST PURCHASED A 2017 COROLLA XSE IN FEB 2017. THE FIRST TIME IT HAPPENED I HAD THE CRUISE CONTROL ON AND WAS TRAVELING TO WORK AT 05:15, AND I CAME TO AN OVERPASS AND ON THE WAY DOWN THE NORMAL OVERPASS OVER A CROSS STREET, I HEARD THE ENGINE REV AND I LOOKED AT THE TACH, AND IT WAS AT 5000 RPM. I WAS STARTLED. THE SAME THING HAPPENED AT THE NEXT OVERPASS. THIS TIME IT WAS 4000 RPM ALMOST AT THE BOTTOM OF THIS RATHER SHORT AVERAGE DOWNHILL. THIS IS STILL HAPPENING, BUT OCCASIONALLY IT DOES NOT. HOW COULD THIS POSSIBLY BE CORRECT. I CAN CONTROL THE SPEED QUITE NICELY WITH MY FOOT ON THE ACCELERATOR WITHOUT HARDLY ANY VARIATION OF MY RPM'S. THIS JUST DOESN'T MAKE SENSE. I AM NOT TALKING ABOUT A LONG DOWNHILL ROAD THAT HAS A LANE FOR TRUCKS ON THE RIGHT, WHERE THEY WOULD HAVE TO DOWNSHIFT TO MAINTAIN A SAFE SPEED, THIS IS JUST OVERPASSES ON A FREEWAY SYSTEM. I ASKED MY SALESMAN, AND HE SAID THAT IT WAS PROBABLY NORMAL, AND I SAID HOW COULD IT BE NORMAL FOR THIS THING TO REV AT 5000 RPM ON A HOUSTON FREEWAY? I ONLY HAVE 5000 MILES ON THIS CAR. THIS WILL DEFINITELY AFFECT THE MILEAGE. I AM BESIDE MYSELF AT THIS POINT.

Mileage: 4,100

ON 3/22/17 I WAS DRIVING AN ENTERPRISE RENTAL CAR INTO AN APARTMENT COMPLEX AND PULLED IN FRONT OF THE LEASING OFFICE TO PARK. WHILE STEPPING ON THE BRAKE PEDAL THE CAR DID NOT STOP AND IT SUDDENLY ACCELERATED CAUSING THE CAR TO CRASH INTO THE PILLARS OF THE LEASING OFFICE WITH FORCE. AIRBAGS DEPLOYED AND MY PASSENGER AND I HAD TO CRAWL OUT OF THE REAR PASSENGER DOOR TO ESCAPE THE VEHICLE. WE ARE LUCKY TO BE ALIVE AND ESCAPE WITH MINOR INJURIES. THERE ARE DRAG SKID MARKS ON THE GROUND FROM THE REAR WHEELS. UPON COLLISION THE ENGINE SHUT OFF EVEN THOUGH THE KEY WAS IN THE RUN POSITION..

Mileage: 4,400

WHILE USING CRUISE CONTROL ON FAIRLY LEVEL ROADWAY, (RURAL ROAD) AT A SPEED OF 45 MPH, THE RPM WERE ABOUT 1500, BUT INCREASED SUDDENLY TO ABOUT 4500 RPM. AFTER AWHILE THE RPM WOULD DROP BACK DOWN TO NORMAL FOR THE SPEED SITUATION. THIS OCCURS ALSO AT HIGHWAY SPEED OF 60 MPH IN OUR AREA. THIS OCCURRENCE HAS HAPPENED MANY TIMES. HAVE RETURNED TO DEALER TWICE NOW. PROBLEM WAS OBSERVED BY SERVICE MANAGER AND LOCAL TOYOTA REP WHO WAS IN TOWN FOR LOCAL AUTO SHOW. CAR WAS ANALYZED AND DATA SEND TO ENGINEER IN CALIFORNIA WHO LATER SAID CAR IS BEHAVING NORMAL. I FOUND THAT HARD TO BELIEVE AS BOTH LOANER CARS (2017 COROLLA) DID NOT BEHAVE IN THIS DANGEROUS FASHION. I FEEL THIS QUICK BRUSH OFF BY THE ENGINEER (TANAKA) WHO IS ONLY OBSERVING DATA AND NOT HAVING TO DRIVE THIS CAR IS WRONG. I FEEL THE COMPUTER SHOULD BE ADJUSTED FOR THE CVT TO SOLVE THIS PROBLEM. WIFE DOES NOT FEEL SAFE DRIVING THIS VEHICLE. WE HAVE TAKEN 3 VIDEOS TO DOCUMENT THIS EVENT.

Mileage: 550

WHEN THE CRUISE CONTROL IS ENGAGED AND THE VEHICLE IS ON A DECLINE THE CRUISE CONTROL DOES NOT MAINTAIN THE SET SPEED. DEPENDING ON THE SEVERITY OF THE DECLINE THE SPEED WILL INCREASE FROM 5 TO 15 MPH. WHEN USING THE ACCELERATOR PEDAL AND MAINTAINING THE EXACT SAME PRESSURE THE VEHICLE ONLY INCREASES SPEED MINIMALLY (2 TO 3 MPH) ON THE DECLINE. WHEN IN CRUISE CONTROL THE SPEED INCREASE IS VERY DRASTIC. THE TOYOTA DEALERSHIP HAS STATED THAT THIS IS A NORMAL OCCURRENCE AND THAT THEY HAVE TESTED SEVERAL SAME MODEL AND YEAR TOYOTA VEHICLES AND ALL HAVE THE SAME SPEEDING TENDENCIES SO THIS IS NORMAL. THE DEALERSHIP STATED THAT THE FIX IS TO ENGAGE THE MANUAL TRANSMISSION MODE TO USE THE ENGINE COMPRESSION TO SLOW THE VEHICLE DOWN. I HAVE FOLLOWED THERE ADVICE AND THIS DOES NOT RECTIFY THE PROBLEM. THE CRUISE CONTROL IN ALL VEHICLES I HAVE OWNED IS USED TO MAINTAIN A CONSISTENT SPEED NO MATTER THE TERRAIN BEING TRAVERSED. THIS ISSUE HAS OCCURRED EVERY TIME WE HAVE ENGAGED THE CRUISE CONTROL ON THE VEHICLE WHILE DRIVING ON A HIGHWAY THAT HAS A DECLINE. *TR