Why Has the Intelligent Headlight Control Stopped Working?
2 Answers
This situation is usually caused by a malfunction in the front headlight bulb, which prevents the intelligent headlight system from operating normally. Below is some relevant information about automatic headlights: 1. Principle: Electronic components such as photoresistors act as sensors (installed behind the rearview mirror, etc.) and send electronic signals to the ECU (Electronic Control Unit, similar to a computer CPU) to inform it whether to turn the headlights on or off, or to switch between high and low beams. The ECU controls the headlight switch and the change between high and low beams. Thus, when driving in environments where the light suddenly becomes dim, the headlights will automatically turn on, and when there is sufficient light, they will automatically turn off. Additionally, during nighttime driving, they may automatically switch between high and low beams when encountering oncoming traffic. 2. Usage: Turn the combination light switch to the AUTO position to activate the automatic headlight function. When driving at night or entering a tunnel, the headlights will automatically turn on.
My car's smart headlights suddenly stopped working. I've encountered this several times, usually because the sensors were blocked by mud or ice - cleaning them fixes it. If they still don't work after cleaning, the control module might be faulty. Core components like the ECU can become loose from vibration or short-circuit due to water ingress. First check the corresponding fuse in the fuse box - replace it if blown. Aging wiring can also interfere with signals, especially the harness connecting the headlights and sensors. Additionally, software bugs may cause system failures - my issue was resolved after a system update at the dealership last time. Remember to check if the body height sensor is properly aligned, as misalignment can cause incorrect light positioning. Don't delay addressing this - perform basic troubleshooting or seek professional diagnosis promptly to prevent nighttime driving hazards.
