Turn on the scanner and select your BMW chassis.Turn on the ignition don't start the engine.Plugin the OBD-II scanner into the diagnostic port under the dashboard.
To determine why you are getting Adaptive Headlight Malfunction, you can read the AHL module's fault codes.įor this step, you will need a BMW scanner that can read codes from the AHL module.
How to Diagnose and Reset BMW Adaptive Headlamps
Install the headlight and make sure the headlight is airtight.īMW AHL module will need to be replaced and coded to the vehicle. Remove the stepper motor controller and allow it to dry for at least twenty-four hours. If water is present inside the headlight, remove the headlight. Inspect the back headlight cover if you are noticing condensation inside the headlight. If not, it will allow water to enter the headlight and damage the adaptive headlight module. When you change a headlight bulb, you need to ensure the seal is seated properly. The access door behind the headlight has a seal.
Note that the headlight will need to be removed from the car to fix repair the stepper motor. Repair kits for BMW stepper motor are sold online if you are looking to fix this problem without replacing the headlight. The motor itself can fail, or the link to the low beam projector can fail. It is controlled by the stepper controller module located below the headlight. The stepper motor is located inside the headlight. The motors that physically turn the low/high beam projector can break. Software such as NCS Expert can be used to code the AHL module to the vehicle. The module can then be replaced with a used BMW Headlight Adaptive Module. To replace the headlight stepper motor controller, you will need to remove the front bumper and the headlight. If that's the case, you will have a fault code stored in the AHL module.
A cracked headlight or a loose access door in the headlight's back will allow water to enter the headlight.īecause the SMC is at the lowest point of the headlight, water gets to the module and damages it, triggering the Adaptive Malfunction error message on the dashboard. The main reason why the adaptive module fails is that water shortens the module. Possible Solutions Replace the Adaptive Headlight Control Unit
The most common problems with BMW adaptive headlightsheadlights are:
Adaptive headlights only turn right,headlights only turn right, not left.This is a list of possible symptoms that you may notice when BMW adaptive headlightsheadlights fail. This guide will help you better understand some of the common issues and possible problems you can fix yourself. This guide will help you better understand some of the common issues and possible problems you can fix headlights problems can cost anywhere from $600 up to $1500 to repair at the shop. BMW adaptive headlights problems can cost anywhere from $600 up to $1500 to repair at the shop.