Adaptive headlights, often found in modern vehicles like Audis, offer enhanced visibility by automatically adjusting the beam pattern based on driving conditions. However, modifications like lowering the suspension can disrupt this system, requiring readjustment using VCDS (Vag-Com Diagnostic System). This guide provides comprehensive instructions for adjusting your Vcds Adaptive Light system, ensuring optimal illumination without blinding oncoming traffic.
Understanding VCDS Adaptive Light
VCDS allows access to the vehicle’s control modules, including the Xenon Range controller responsible for adaptive headlights. By accessing this module, you can reset the system to factory defaults and then perform a basic setting adjustment to recalibrate the headlight aim. This process is crucial for maintaining proper headlight function and avoiding dashboard warnings related to dipped headlights.
Two Methods for Adjusting Headlights with VCDS
There are two primary methods for adjusting your adaptive headlights: a simple manual adjustment for minor corrections and a more involved procedure using VCDS for significant changes or resetting the system.
Method 1: Minor Adjustments (No VCDS Required)
This method is suitable for small adjustments when the headlights are slightly misaligned.
Tools: Phillips head screwdriver.
Procedure:
- Park and Prepare: Park on level ground approximately 20 feet from a flat wall, preferably in a dark environment. Turn on the headlights.
- Locate Adjusters: Open the hood and identify the vertical and lateral adjustment screws on the headlight housing. Vertical adjusters control up/down movement, while lateral adjusters control left/right. They may be covered by dust caps.
- Adjust Vertically: Cover one headlight to focus on the other. Slowly turn the vertical adjuster screw. Clockwise raises the beam, counterclockwise lowers it. Aim for a downward angle of approximately 1.5 degrees, meaning the beam should be about 0.5 inches lower at 20 feet. Repeat for the other headlight.
Method 2: VCDS Adjustment for Resetting and Recalibrating
This method is necessary for significant adjustments, resetting the system to factory defaults, or resolving “dipped headlight” errors on the dashboard.
Tools: Phillips head screwdriver, laptop/tablet/PC with VCDS software, VAG-COM diagnostic cable.
Procedure:
-
Preparation: Park the vehicle and turn on the headlights. For lowered vehicles, raising all four wheels off the ground is highly recommended to ensure accurate sensor readings during recalibration.
-
Connect VCDS: Connect the VAG-COM cable to the vehicle’s diagnostic port and your computer. Launch the VCDS software.
-
Access Xenon Range Controller: Select “Select Control Module,” then choose “55-Xenon Range.”
-
Reset to Factory Defaults (If Necessary): If a “dipped headlight” fault is present:
-
Go to “Adaptation – 10.”
-
Enter channel 00 and click “Read” to load factory defaults.
-
Click “Save” to apply the reset.
-
-
Basic Settings Adjustment:
- Go to “Basic Settings – 04.”
- Click “Go!” to initiate the learning process. The output boxes will display instructions.
- When prompted with “ADJUST” or “LEARNING”, manually fine-tune the headlight aim using the adjustment screws. If no manual adjustment is needed, wait 20-30 seconds for the module to learn the current position. If your car is raised, make sure it is level!
- Click “On/Off/Next” to complete the process. The output boxes should confirm successful adjustment.
-
Verify Fault Codes: Check for fault codes in the Xenon Range controller. A successful adjustment should clear any previous “dipped headlight” errors.
Conclusion
Properly adjusted adaptive headlights are crucial for both safety and visibility. By following this guide, you can utilize VCDS to effectively adjust your adaptive light system, ensuring optimal performance and a safe driving experience. Remember to consult your vehicle’s specific documentation for any variations in procedures or channel numbers. Always prioritize safety and avoid blinding oncoming traffic.
