What are the reasons for the malfunction of the headlight range control?
4 Answers
Prompting a malfunction in the headlight range control is due to a failure in the adaptive cruise headlight steering. Below are the specific details about adaptive cruise headlights: 1. Function: The Adaptive Front-lighting System (AFS) adjusts the direction of the headlight beam according to current driving conditions, moving the beam left or right based on vehicle speed and steering wheel angle. The system works in conjunction with the headlight direction automatic adjustment system to improve visibility during turns and at intersections. 2. Usage: The system starts operating when the vehicle speed exceeds 10 km/h. It can operate within the maximum range of the steering wheel angle. If you do not wish to activate the system, press the "AFS OFF" button to turn it off. To turn it on again, press the same button. When the system is off, the "AFS OFF" indicator on the instrument cluster lights up. If the system malfunctions, the "AFS OFF" indicator on the instrument cluster will flash.
I recently encountered an issue with malfunctioning headlight range control, which could be related to several causes. The most common one is a faulty vehicle height sensor. This device, located on the chassis, detects changes in the vehicle's height. If it fails or gets clogged with dust, the computer can't accurately determine the vehicle's height, causing erratic light range adjustments. Additionally, problems with the control module or electronic components are not uncommon—issues like aging internal circuits or software bugs can lead to inaccurate command transmissions. While driving, I noticed the headlights flickering up and down, affecting nighttime driving safety and making me nervous. Later, a mechanic confirmed that the sensor needed replacement. I’ve also heard that poor wiring connections or loose plugs can trigger this malfunction, especially after driving on bumpy roads. In short, prompt diagnosis is crucial to avoid accidents.
As a seasoned driver with over 20 years of experience, I believe the causes of headlight range control malfunctions are often quite common. First, the actuator motors or gears may get stuck, such as when the beam adjustment motor rusts or wears out, preventing proper adjustment of the headlight angle. Second, an unbalanced vehicle load—like a fully loaded rear seat or heavy luggage—can cause the automatic adjustment system to fail, resulting in glaring lights. I always prioritize maintenance, knowing small issues can escalate if neglected. I also check if abnormal tire pressure affects sensor readings. Ignoring such problems can impair nighttime visibility and endanger pedestrians, so I recommend prompt professional inspection rather than delaying repairs.
The issue with the headlight range control has been analyzed several times, with the main sources being sensor or actuator failures. For example, a faulty height sensor cannot detect the vehicle's position, or the motor coil that adjusts the light beam may be burnt out, resulting in insufficient power. It could also be due to loose wiring connections affecting signal transmission. Sometimes, when the vehicle is started on a slope, the system temporarily fails. Don't overlook this minor fault, as it can cause the lights to shine directly into others' eyes, which is very dangerous.
