Toyota Avalon adaptive cruise problems

Filed May 7, 2025 · Acceleration, Driver assistance · IN

Cruise control stopped working while driving interstate speed. Would not work and all lights on dashboard came on . Proceeded to Nearest dealership and was informed that I needed a brake switch. Did not fix the problem. Have been informed that I need a wiring harness! About to spend a total of 400.00

Filed Sep 12, 2023 · Brakes · 40,500 miles · TN

The contact owns a 2019 Toyota Avalon. The contact stated while driving approximately 65 MPH, the "parking brake malfunction" warning flashed. The contact proceeded to his destination and shifted the vehicle into park (P) but did not engage the parking brake for fear that it might not disengage. The contact drove the vehicle to the local dealer where it was diagnosed that there had been a malfunction of the Parking Brake or Cruise Control Malfunction warning message on the MID (multi-information display) with Diagnostic Trouble Code (DTC) C13B0 (Electric Parking Brake ECU Malfunction) the federal safety agency ID Number: 10172860 (Parking Brake). The contact was advised that the remedy required a software update of the ECU. The vehicle had not been repaired. The contact stated that the failure was intermittent. The manufacturer had been informed of the failure. The failure mileage was approximately 40,500.

Filed May 17, 2021 · Acceleration, Brakes · TN

This incident has happened twice in three years. Hence it is a very rare occurrence. Both times involved the same events. Cruise control was on. I was traveling in the left lane of the interstate highway, approaching an 18-wheel truck which was in the right lane. When I was approximately 50 feet from the rear of the truck, the truck began to enter my lane. I suspect I was in the trucker's blind spot. My car did not sense the truck. The cruise control did not disengage. The brakes did not engage. But the MOST troublesome was that the car did not respond to my pressing on the brake pedal. I had to press 4 or 5 times before the cruise control would disengage and the brakes engage. Since I was traveling approximately 70 mph, the distance between my car and the truck (each time) closed rapidly. In the first instance, the truck tire hit my right front fender. I moved to the shoulder of the road and eventually the car braked. In the second case, I avoided collision by about 10 feet. I use the cruise control frequently and in EVERY other circumstance, the sensors on my car have worked correctly and disengaged the cruise control and I have never had a problem with breaking. I suspect a blind spot in the sensor system but why, only in this situation, does the brake system fail to disengage the cruise control when i press on the brake is a very troublesome mystery to me. Answering question on web page: My safety - life threatening, No dealer consultation, Regular maintenance schedule maintained, No warnings.

Filed May 9, 2021 · Driver assistance · 15,770 miles · MI

The pre-collision braking system does not appear to work. Several times when cars in front of us have slammed on their brakes, the pre-collision braking system does not respond. We own a 2016 prius with the same feature and it always responds ' flashing a warning and applying the brakes. We complained to the dealership multiple times, and they said the system in our car performs a check every time we turn on the car and since it does not indicate a fault, to their knowledge the system is working fine. They said there are no other tests for them to perform. I've adjusted the system to the most sensitive mode (active when vehicle in front of us is further away), but this has had no effect. Also, the adaptive cruise control which uses the same radar system as the pre-collision braking works fine. There definitely is something wrong with the pre-collision braking, and I am concerned that this safety feature will not save us from a collision. The only way someone would be aware that the system isn't working is to experience a near collision. I believe the pre-collision braking system could be tested without damaging our car by placing a large stationary inflatable object in front of our moving car. I would be glad to provide our car for you to perform such a test or another test that you may have developed. This may be a problem with many other toyota avalons and other cars.

Filed Dec 22, 2020 · Driver assistance · 12,000 miles · NC

Tl* the contact owns a 2019 toyota avalon. The contact stated that the dynamic cruise control had become inoperable. The contact stated that while driving at 60 MPH, the dynamic cruise control malfunctioned and the automatic emergency braking activated and the vehicle came to an abrupt stop. The contact stated that the failure was worse while driving in inclement weather. The vehicle was taken to scott clark toyota (13052 marie garris rd, matthews, nc 28105) to be test driven. While being test driven along with the technician, the failure recurred. The vehicle was not diagnosed nor repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 12,000.

Filed Jul 5, 2020 · Visibility · 86,000 miles · PA

This issue happened while the vehicle was in motion on the highway. Rear sunshade randomly deployed and is permanently stuck in the up position completely blocking rear visibility. Sunshade is supposed to go down when vehicle is placed in reverse, this function no longer works further inhibiting safe vehicle maneuvering. The rear facing backup camera has a statement saying to not rely on the backup camera when backing up, this no longer an option for me as I can no longer clearly see out of the rear window. Night time reversing is virtually impossible with any degree of safety. This appears to be a known issue with toyota as they replaced a relay in the sunshade in model years after 2014 that seems to have remedied this issue. There is no way manually lower the sunscreen. There's no way to easily swap out the defective relay. There's no way to disconnect the sunshade from the wiring harness. There isn't an independent fuse for the sunshade that can be removed. The sunshade appears to be on a fuse that controls the headlights, taillights, braking system and cruise control system. By removing the fuse this would make my vehicle even less safe the it already is.

Filed Jun 13, 2019 · Acceleration · 11,000 miles · VA

In dynamic radar cruise control, the car does not act as described on page 237 of the owners manual. The manual states even without canceling the cruise control, the set speed can be increased by first accelerating the vehicle to the desired speed and then pushing thelever down to set the new speed." when I try to do this the vehicle will quickly slow down to 1 MPH below the previous set speed. Sometimes, the brakes are applied to bring the car down to that speed. This could be unsafe, especially on wet pavement. Toyota say the car acts as intended.

Filed Apr 2, 2019 · Acceleration · 5,000 miles · TX

While driving down the road with the adaptive cruise control on the car randomly slams on the brakes. This has happened multiple times. It has happened on highway driving and street driving.

Filed Dec 17, 2016 · Acceleration · 1,200 miles · FL

Takata recall a recall was made on this vehicle in octobert of 2015 replacement parts are not availble nearly had four bad accidents on a highway going to chicago the radar cruise control is supposed to slow the car when you get to close to the car in front of you. On certain occasion this does not happen.

Filed Oct 20, 2016 · Acceleration, Driver assistance · 85,000 miles · OK

While driving westbound on the muskogee turnpike (hwy 351), at mile marker 20, the cruise control shut off, vehicle stability icon came on, check engine light began flashing. The car also lost power and ran rough. Pulled over, shut off vehicle. After restarting, the car ran fine. This has happened twice, october 3rd and october 17th in 2016. This vehicle is equipped with a keyless remote. Additionally, this happened next to a cell phone tower on the north side of the highway. It does not occur while traveling the opposite direction on the highway.