What does dynamic headlight following failure mean?
2 Answers
If the headlight following failure occurs, it is either due to a faulty sensor or a malfunction in the small motor of the headlight assembly. It is recommended to check the fault code for a more accurate diagnosis. Headlight following steering means that the direction of the light beam turns in the same direction as the steering wheel. More details are as follows: 1. Definition of AFS: AFS, also known as Adaptive Front-lighting System, dynamically adjusts the headlights based on the steering wheel angle, vehicle yaw rate, and driving speed to adapt to the current steering angle, ensuring that the light direction aligns with the vehicle's current driving direction. This provides optimal illumination of the road ahead and maximum visibility for the driver. The system automatically adjusts the headlight deflection according to driving speed and steering angle to illuminate the "unreached" area in advance, offering comprehensive safety lighting and significantly enhancing driving safety in the dark. In road conditions with no (or weak) streetlights or multiple curves, it expands the driver's field of vision and can alert oncoming vehicles in advance. 2. During nighttime vehicle turns: To ensure the driver can see the road conditions in real time, a vehicle turn assist lighting device can also be used. In this device, the turn assist lighting lamp and the headlight position are fixed, but the effect of turn assist lighting is achieved through real-time control of the activation time. Even if the vehicle is not in motion, the side assist lighting will still activate as long as the steering wheel is turned, which is very convenient for driving at night in areas without streetlights, especially when making a U-turn in place.
The dynamic headlight cornering function failure means the headlights don't follow the steering wheel during turns, right? I experienced this before when driving my friend's car equipped with this feature - at night when cornering, I could clearly see the beams stubbornly pointing straight at the wall while the car was already turning. This system mainly relies on the steering angle sensor below the wheel and vehicle dynamic sensors working together - sensor contamination, poor wiring connections, or water damage to the control module can all cause malfunctions. The repair is quite troublesome; just replacing the module alone cost over 2,000 yuan. If you notice the headlights remain rigid during turns, get it checked immediately - driving sharp corners at night without this function is like groping in the dark.
