After installing Bi-Xenon headlights with AFS on a 2013 VW Jetta TSI Highline, some functionalities might not work correctly. This article focuses on troubleshooting a common issue: the AFS lighting fault, often caused by incorrect VW VCDS coding.
While features like the start-up dance sequence, low beam, high beam, and indicators may function correctly, issues can arise with the bend lighting (AFS) function, parking lights, and daytime running lights. This typically points to a coding problem within the vehicle’s control modules, specifically those related to lighting. Using a diagnostic tool like VCDS (Vag-Com Diagnostic System) can help pinpoint the problem.
A VCDS scan reveals fault codes within specific modules. The most relevant for AFS issues is often found in Address 09: Cent. Elect. and Address 55: Headlight Range. Address 09 manages many lighting functions, while Address 55 controls the AFS module itself.
The error “5275220 – Headlight C107E 54 [137] – Missing Calibration / Basic Setting” in Address 55 directly indicates a need for calibration. This procedure aligns the headlights to ensure they move correctly according to steering input and vehicle level. Incorrect calibration prevents AFS from functioning and triggers the fault code.
Beyond calibration, scrutinize the coding in Address 09. Several bytes control lighting features. Verifying the correct values for Xenon headlights with AFS is crucial. These values tell the central electronics module which lighting equipment is installed, enabling proper communication and function. Discrepancies in these settings can lead to malfunctioning AFS and related lighting problems.
Consult reputable VW coding resources to determine the appropriate coding for your specific Jetta model and installed equipment. Online forums and the official Ross-Tech VCDS website often provide valuable information. Inputting the correct coding establishes the foundation for proper headlight operation.
After adjusting the coding, performing the Basic Setting procedure for the AFS module in Address 55 is mandatory. This allows the module to learn the operational range of the headlights and adapt to the vehicle’s suspension. Skipping this step will result in persistent AFS errors.
Resolving an AFS lighting fault in a VW often requires a two-pronged approach: correct VCDS coding and subsequent calibration. Accessing the correct coding for your specific vehicle is paramount. Always double-check coding values before implementing them.
Successfully addressing the AFS fault restores the full functionality of your Bi-Xenon headlights, ensuring optimal lighting performance and safety. Remember to clear any fault codes after completing the coding and calibration process to confirm the fix. Using VCDS systematically and understanding its functionalities helps diagnose and resolve complex automotive issues effectively.
