Retrofitting Audi AFS (Adaptive Frontlighting System) headlights can significantly enhance your vehicle’s safety and aesthetics. However, this upgrade isn’t always straightforward, and users sometimes encounter issues post-installation. One common scenario involves error messages, malfunctioning leveling systems, and disabled cornering lights after swapping to AFS Bi-Xenon headlights. This article delves into a real-world case, exploring the problems, potential causes, and troubleshooting steps for Audi AFS headlight retrofits, focusing on resolving the dreaded “Audi adaptive headlight error.”
The Retrofit Challenge: A User’s Experience
A user recently upgraded their Audi with US Bi-Xenon headlights to AFS Bi-Xenon headlights featuring cornering lights. Despite careful installation, they were met with a persistent error message on the dashboard: “Audi adaptive headlight error.” Further investigation revealed several malfunctions:
Symptoms: ‘Audi adaptive headlight error’, No Leveling, Cornering Lights Not Working
The primary issues reported were:
- Dashboard Error: Constant “Audi adaptive headlight error” warning.
- Headlight Leveling Malfunction: Headlights perform the initial dip upon engine start but fail to level dynamically. Raising the vehicle’s rear does not trigger headlight adjustment.
- Cornering Lights Inoperative: The cornering light feature of the AFS headlights is not functioning.
- Component Protection (CP) Inhibition: Some vehicle features are disabled due to Component Protection being active on the Body Control Module (BCM).
Retrofit Steps Taken
To provide context, here are the retrofit steps the user had already undertaken:
- New AFS Headlights: Installation of two new headlights equipped with AFS control modules.
- BCM Upgrade: Swapped the original BCM (8K0 907 063 DH) for a BCM designed to support AFS (8K0 907 063 DJ). The newer BCM variant is crucial for AFS communication and headlight washer system output.
- Wiring Modifications: Adjusted wiring to provide power and CAN bus communication to the new headlights, disconnecting the BCM’s direct control over headlight motors.
- Headlight Washer System Addition: Installed a headlight washer system and connected it to the upgraded BCM.
Despite these steps, the “Component Protection” error persisted on the used BCM, and an Audi dealer was unable to remove it, citing “hardware issues.” Diagnostic scans revealed several error codes.
Decoding the Error Codes and Component Protection
The diagnostic scan using VCDS (VAG-COM Diagnostic System) revealed critical error codes pointing to the root of the problem:
Component Protection Active (02095)
This error, logged in both the BCM and CAN Gateway, indicates that the replacement BCM is from another vehicle and its component protection feature is active. Component Protection is an anti-theft measure by Audi, locking certain electronic control units to the original vehicle’s VIN. Until CP is removed, the BCM will not fully integrate with the car’s system, leading to functional limitations.
Headlights Not Adjusted (01539)
This error directly relates to the headlight leveling issue. It signifies that the headlights have not been properly calibrated or adapted after installation. This is often a consequence of the Component Protection issue, as basic settings and adaptations might be blocked until CP is resolved.
Incorrectly Coded Power Output Stage (02658 & 02659)
These errors, specific to the left and right headlights, suggest potential coding mismatches for the new AFS headlight power output stages. Incorrect coding can prevent the headlights from functioning correctly, including the AFS and cornering light features. It could stem from incorrect coding of the BCM itself or the individual headlight control modules.
Potential Causes and Troubleshooting Steps
Based on the symptoms and error codes, here are the likely causes and troubleshooting steps to resolve the Audi AFS headlight retrofit issues:
Component Protection Removal
The primary obstacle is Component Protection. While dealerships are supposed to remove CP, the user in this case was unsuccessful. Here’s what to consider:
- Alternative Dealerships: Try a different Audi dealership. Sometimes, technician experience or dealership policies can vary. Clearly explain the retrofit and the need for CP removal on the replacement BCM.
- Specialized Retrofitters: Seek out independent shops specializing in Audi retrofits and coding. They often have tools and expertise to remove Component Protection or offer workarounds.
- Online CP Removal Services: As a last resort (and with caution), online services claim to remove CP remotely. Research thoroughly and choose reputable services, as this involves modifying your car’s software.
It’s crucial to address Component Protection first, as it likely blocks further adaptations and coding required for the AFS headlights to function correctly.
Coding and Adaptation Issues
Once CP is resolved, coding and adaptation are the next critical steps:
- VCDS Recoding: Using VCDS, ensure the BCM and headlight control modules are correctly coded for AFS headlights and the vehicle’s specifications. This involves entering specific coding strings that tell the car the new hardware configuration.
- Basic Settings and Adaptation: Within VCDS, perform the “Headlight Adjustment” basic setting. This procedure teaches the system the neutral position of the headlights and enables the leveling function. If this was failing with “Wait” and “N/A” before, it should become accessible after CP removal and correct coding.
- Controller Channel Mapping: Verify that the controller channels for headlight control are correctly mapped within the BCM. This ensures proper communication between the BCM and the AFS modules.
Wiring and Module Compatibility
While less likely if basic headlight functions are working, double-check:
- Wiring Integrity: Re-examine all wiring connections made during the retrofit. Ensure secure connections and correct pin assignments as per retrofit guides.
- Module Compatibility: Confirm that the AFS headlight control modules are compatible with the BCM and the car’s model year. Part number verification is essential.
Conclusion
Successfully retrofitting Audi Afs Headlights requires addressing both hardware installation and software integration. Component Protection is a significant hurdle that must be overcome first. Following CP removal, correct coding and adaptation using tools like VCDS are essential to resolve errors like “Headlights Not Adjusted” and “Incorrectly Coded Power Output Stage.” By systematically troubleshooting these areas, you can unlock the full potential of your Audi AFS headlights and enjoy enhanced visibility and safety. Remember to consult experienced retrofitters or Audi specialists if you encounter persistent difficulties.
