What does it mean when the functional range of the Active Brake Assist system is limited?
2 Answers
The Active Brake Assist system is primarily composed of three major modules: the control module, the distance measurement module, and the braking module. It utilizes devices such as radar, ultrasonic sensors, and cameras to monitor the road ahead. When a collision risk is detected, the vehicle's computer will automatically apply emergency braking. Below is more related information: 1. Reasons that may cause the functional range of the Active Brake Assist system to be limited: 1. The radar sensor system temporarily stops functioning, possibly due to interference from electromagnetic radiation emitted by nearby TV stations, radio stations, or other electromagnetic radiation sources. 2. The system is operating outside its working temperature range. 3. The vehicle's voltage is too low. 4. Functionality is impaired due to heavy rain or snow, or the radar sensor system may malfunction due to dirty sensors. If the front radar sensor system is dirty, the Active Blind Spot Assist system will attempt to correct the driving route through braking and will also sound a warning tone. When the cause of the problem no longer exists, the driving system and driving safety systems will become available again.
A few days ago, while driving long-distance back to my hometown, the dashboard suddenly displayed a warning indicating that the Active Brake Assist system's functional range was limited, which made me quickly slow down and stop at a service area to check. As a veteran driver with over 20 years of experience, I've encountered this situation many times: most often, it's because the radar sensor or camera at the front of the car is covered with dead insects and mud, especially when driving in the rain, which makes it easier for dirt to accumulate. Usually, wiping it clean with a cloth can restore normal function, but if the error persists after restarting the vehicle, it might indicate sensor damage or aging circuits requiring part replacement. This system is particularly crucial during high-speed driving as it helps prevent rear-end collisions, so I recommend that car owners always carefully clean the sensor areas during every car wash. Never ignore the warning and continue driving. If the issue can't be resolved, take the car to a 4S shop for a comprehensive inspection as soon as possible—safety should always come first.
