Understanding the nuances of rain closing functionality and rain light sensor (RLS) compatibility in your VW Alltrack can be confusing. Different RLS part numbers and their corresponding components (RLS vs. RLHS) determine whether automatic rain closing is possible. This article dives into VCDS scans and user experiences to clarify compatibility for VW Alltrack models.
Decoding the VCDS Scan for Rain Closing Compatibility
A VCDS scan provides critical information about your vehicle’s installed components. For rain closing functionality in a VW Alltrack, focus on the following:
- Module 09 – Central Electrics: This module houses the rain light recognition sensor. Within this section of the VCDS scan, you’ll find:
- Component: Look for either “RLS” (Rain Light Sensor) or “RLHS” (Rain Light and Humidity Sensor). Generally, “RLS” indicates rain closing is possible, while “RLHS” suggests it isn’t.
- Part Number (PN): The PN identifies the specific sensor installed in your vehicle. Common PNs associated with rain closing include 5Q0 955 559 and 5Q0 955 547. PNs like 8U0 955 559 and 7N0 955 559 are often linked to systems without rain closing.
- Coding: The coding may hold clues about activated features. However, simply having a compatible part number doesn’t guarantee rain closing is enabled. Further coding adjustments might be necessary.
Real-World Examples: VW Alltrack Rain Sensor Variations
User experiences further illuminate the complexities of rain closing in the VW Alltrack. For instance, a 2018 Alltrack VCDS scan revealed:
- Component: RLS
- Part Number: 5Q0 955 559
This combination theoretically supports rain closing. However, real-world testing is crucial to confirm functionality. Conversely, some users have reported having a compatible part number listed in their scan (e.g., 5Q0 955 547), but the component is identified as “RLHS,” suggesting rain closing isn’t supported.
Addressing Conflicting Information
Discrepancies between part numbers, component designations, and actual functionality highlight the need for careful analysis. Factors beyond the RLS itself, such as coding within other modules (e.g., door modules), can influence rain closing.
Confirming Rain Closing Functionality
To definitively determine if your VW Alltrack supports rain closing:
- Perform a thorough VCDS scan: Analyze Module 09 for the component and part number.
- Check Vehicle Settings: Look for an option to activate or deactivate “Auto Rain Closing” in your Alltrack’s infotainment system. The presence of this option usually indicates the hardware is present.
- Real-world Testing: Simulate rainfall (e.g., with a spray bottle) to verify the windows and sunroof close automatically when the sensor is triggered.
Conclusion: Using VCDS for VW Alltrack Rain Closing Diagnostics
VCDS is an invaluable tool for understanding and diagnosing rain closing issues in your VW Alltrack. While part numbers offer a starting point, analyzing the complete VCDS scan, specifically Module 09 – Central Electrics, in conjunction with vehicle settings and real-world testing provides the most accurate assessment of rain closing compatibility and functionality. Remember, professional assistance may be required for complex coding adjustments or troubleshooting.
