I noticed that adaptive cruise control does not slow down sometimes when the car in front slows down. Is this a known problem with cruise control or is it defective in my car? It works fine most of the time. I see this problem only sometimes. Could the sensor in front Toyota logo be bad?
Have not seen this either in my 2017 or my 2024. If anything, it errs on the side of slowing down when it doesn't need to.
Are you sure it is in adaptive mode, and not simple cruise mode where it would normally not react to a slowing leader?
Haven’t had any issues with our 2022 Nightshade Edition XLE. What are the ambient light conditions when it happens or possibly the shape of the vehicle in front of you? EDIT: pages 335 and 336 in your Owners Manual list quite a few conditions that will cause the system to not respond “correctly”. Several of them could easily be a fairly common occurrence IMHO. ■ When the sensor may not be correctly detecting the vehicle ahead In the case of the following and depending on the conditions, operate the brake pedal when deceleration of the system is insufficient or operate the accelerator pedal when acceleration is required. As the sensor may not be able to correctly detect these types of vehicles, the approach warning (P. 331) may not be activated. ●Vehicles that cut in suddenly ●Vehicles traveling at low speeds ●Vehicles that are not moving in the same lane ●Vehicles with small rear ends (trailers with no load on board, etc.) ●Motorcycles traveling in the same lane ●When water or snow thrown up by the surrounding vehicles hinders the detecting of the sensor ●When your vehicle is pointing upwards (caused by a heavy load in the luggage compartment, etc.) ●Preceding vehicle has an extremely high ground clearance ■Conditions under which the vehicle-to-vehicle distance control mode may not function correctly In the case of the following conditions, operate the brake pedal (or accelera- tor pedal, depending on the situation) as necessary. As the sensor may not be able to correctly detect vehicles ahead, the system may not operate properly. ●When the road curves or when the lanes are narrow ●When steering wheel operation or your position in the lane is unstable ●When the vehicle ahead of you decelerates suddenly ●When driving on a road surrounded by a structure, such as in a tunnel or on a bridge ●While the vehicle speed is decreasing to the set speed after the vehicle accelerates by depressing the accelerator pedal
Never had an issue with mine; but don't try using it while raining. I believe that's in the manual. It seems to do fine in foggy conditions - but I'm too much of a control freak to enable it for any length of time.
