What Causes the Automatic Emergency Braking Function to Be Restricted?
2 Answers
The "Automatic Emergency Braking System Unavailable" warning on the dashboard is not related to braking issues as commonly misunderstood, but rather refers to a close-range collision prevention assist feature. The primary reason for this fault alert is that the vehicle's software system was not updated in time during the detection process, resulting in certain functions not being successfully unlocked. The automatic emergency braking system is a safety feature that defaults to being enabled with each ignition cycle. When the system detects a potential hazard, it will assist the driver in the following ways: 1. Safe Distance Alert: This function operates under non-emergency conditions. When the vehicle speed reaches 65 km/h or higher, it alerts the driver if the following distance to the vehicle ahead is too short, prompting the driver to adjust their driving behavior and maintain a safe distance. 2. Predictive Collision Alert: When the vehicle speed reaches 30 km/h or higher, the system identifies a potential collision risk and alerts the driver through warning sounds and dashboard display images. 3. Emergency Braking Assist: At speeds of 30 km/h or higher, if a hazardous situation occurs but the driver's braking force is insufficient, the system will assist by increasing the braking force to avoid or mitigate a collision. 4. Automatic Emergency Braking: If a hazardous situation occurs and the driver fails to react effectively, the system will intervene at the appropriate moment to perform automatic emergency braking, thereby avoiding or reducing the severity of a collision. The automatic emergency braking system can reduce the vehicle speed by up to 50 km/h.
I've thought about situations where the Automatic Emergency Braking (AEB) function is limited. Common causes include dirty sensors—for instance, when the windshield camera is covered by dust or snow, preventing the system from detecting obstacles; hardware failures like damaged radar modules or loose wiring harnesses; software bugs requiring updates; weather factors such as heavy rain or fog interfering with signals; as well as unstable battery voltage or system calibration errors. It's extremely dangerous when the system is limited while driving, as it may completely fail. I recommend immediately cleaning the sensor area, checking for error codes, and then taking the vehicle to a professional shop for inspection. Avoid relying on it under harsh conditions, and developing a habit of regular maintenance can reduce the occurrence of such issues. Don't wait for an accident to take action—safe driving is about every single moment.
