This article explores the process of retrofitting Dynamic Light Assist (DLA) on a 2017 Volkswagen e-Golf (Mk7.5) using VCDS. The vehicle originally came equipped with High Beam Assist (HBA), Lane Assist Plus, and other driver assistance features, but lacked DLA. This guide details attempts to activate DLA through VCDS coding and adaptation changes, focusing on the challenges and potential solutions.
Understanding the e-Golf’s Lighting System
The EU-spec e-Golf seemingly offers only one LED headlight variant (part numbers 5GE941773A/5GE941774A for LHD). The minimal price difference between the factory options for HBA and DLA suggests that the hardware for DLA might already be present, potentially requiring only software activation. This theory is further supported by similar successful DLA activations in other VAG vehicles like the 2017 Tiguan.
VCDS Coding and Adaptation Attempts
Several coding and adaptation changes were attempted based on documented procedures for DLA activation in various Volkswagen models:
- Documented Procedures: Adaptations and coding were modified according to online resources specifically outlining DLA activation procedures.
- Passat Lane-Keep Retrofit Inspiration: Coding modifications were attempted based on a Passat lane-keep retrofit guide, leveraging similarities in system architecture.
- Tiguan DLA Activation: Further adjustments were made referencing a successful Tiguan DLA activation process.
- Light Settings Exploration: Various light settings within modules A5 (Front Sensor Driver Assist) and 09 (Central Electrics) were explored to identify potential activation triggers.
Example of VCDS Coding Screen
Despite these attempts, a consistent “Fault: Light Assist” error appeared on the dashboard, accompanied by a command timeout fault code in either module A5 or 09. This suggests potential issues with module coding, CAN bus wiring, or missing gateway configurations. A noticeable symptom of this fault is the headlight calibration dipping to the lowest position and remaining there for an extended period before returning to the standard HBA level. Basic settings were performed prior to each attempt to ensure proper initialization.
Headlight performing calibration dip
Troubleshooting and Further Investigation
The persistent “Fault: Light Assist” error necessitates further investigation into several areas:
- Module Coding Verification: Double-checking the accuracy of coding changes in all relevant modules is crucial.
- CAN Bus Integrity: Examining the CAN bus wiring for any potential damage or incorrect connections is necessary.
- Gateway Configuration: Ensuring the correct gateway installation and configuration for DLA compatibility is vital.
- Hardware Verification: Although less likely, confirming the presence of physical shutters within the headlight assembly might be necessary if software solutions fail.
Close-up of the e-Golf Headlight Assembly
Seeking Community Input
Assistance from the VW community is requested to provide insights or solutions for enabling DLA on the 2017 e-Golf. Specific areas of interest include:
- Confirmed DLA activation procedures for the e-Golf.
- Insights into potential coding conflicts or missing prerequisites.
- Guidance on verifying hardware compatibility.
The attached autoscan provides a detailed overview of the vehicle’s module configurations and may offer clues for troubleshooting. Further module adaptation maps can be provided upon request.
