What is the reason for the Lexus AFS OFF light being on?
2 Answers
"When the Lexus AFS OFF light is on, it indicates that the adaptive front-lighting system (AFS) has been turned off. At this time, press the switch button located above the brake pedal to reactivate the intelligent headlight steering function. If the AFS indicator light remains steadily lit, it means the function is in the off state. If the indicator light is flashing, it indicates a malfunction in the function. The Lexus AFS function is enabled by default, and the switch button is located on the plastic cover above the brake pedal. When the AFS function malfunctions, you can try disconnecting the battery's negative terminal. First, ensure the vehicle's power is off, then open the engine hood, locate the battery's negative terminal, and use a wrench or other tool to disconnect it. Wait for about ten minutes before reconnecting it, which will reset the vehicle's control system."
My Lexus also had the AFS OFF light come on before, and there are several common causes. One is accidentally pressing the button with a steering wheel icon on the left side of the steering wheel, which manually turns off the system. Another possibility is a sensor issue—for example, after heavy rain, the radar probe might get covered in mud, or the system might temporarily shut itself off in places like underground garages with steep slopes. Last time my car scraped the curb, the light came on the next day, and the dealership found that the height sensor was misaligned. These adaptive headlights require coordination between the steering sensor and the body control module, and oxidation in the wiring connectors of older cars can also trigger false alerts. I’d recommend washing the car to clean the probes first, then turning the engine off and restarting. If that doesn’t work, you’ll need a diagnostic tool to check the trouble codes—guessing blindly might just waste time.
