To determine whether a vehicle's blind spot detection system is functioning properly, observations can be made from four aspects: startup self-check, speed-triggered activation, warning icon status, and special scenario responses. During operation, note the speed threshold: the system usually activates when speed exceeds 10 km/h and automatically deactivates below 6 km/h. Monitoring the rearview mirror warning icon is critical: no illumination indicates normal operation with no vehicles in the blind spot; a steady yellow light signifies detected vehicles; a flashing yellow warns of vehicles in the blind spot during turn signal activation or lane changes; persistent yellow illumination without triggers suggests potential system malfunction or deactivation. In special conditions, system inactivity during reversing/parking is normal, while radar obstruction by rain/mud causes temporary disablement requiring cleaning. If the corresponding warning icon fails to flash with turn signal activation or dashboard alerts appear, consult the manual or authorised service centre. Certain models employ audible alerts (e.g., buzzers) to reinforce warnings - these integrated functions significantly enhance lane-change safety.
