Using VCDS to modify instrument cluster coding can sometimes result in frustrating errors. One common issue is “Coding Rejected. Error 31: Request out of range.” This error can occur across different VW models and VCDS versions, as highlighted by a recent experience with a 2017 VW Golf and a 2015 VW Jetta TDI. Attempts to disable the seatbelt warning on the Golf and subsequently re-enable it on the Jetta, both using a Windows 10 tablet running VCDS 19.6.2 with a genuine HEX+USB adapter, resulted in the Error 31.
Understanding VCDS Error 31 and Potential Causes
The “Request out of range” error suggests a communication problem between the VCDS software and the vehicle’s instrument cluster module. While the exact cause can vary, several factors may contribute to this issue:
Software Compatibility:
Initially, the issue seemed related to VCDS software updates. Downgrading to VCDS 18.9.1 on the same Windows 10 tablet did not resolve the problem. However, installing version 18.9.1 on a Windows 7 laptop allowed successful recoding on the 2015 Jetta. This suggests potential compatibility issues between specific VCDS versions and the Windows 10 environment on the tablet. Further testing will determine if newer versions function correctly on the Windows 7 machine.
Hardware or Driver Issues:
Although the same tablet with Windows 10 and VCDS successfully coded the Jetta in 2016, the current inability to write new coding suggests a possible change in the tablet’s hardware or drivers. The tablet can still read the existing coding, indicating a partial communication breakdown.
Vehicle Differences:
The initial coding attempt on the 2017 Golf might point to differences in module coding acceptance between different vehicle models and years. Further testing on the Golf using the Windows 7 laptop will help isolate the problem.
Isolating the Source of VCDS Error 31
The question remains whether Error 31 originates from the vehicle’s control module or if it’s a result of internal checks within the VCDS software. Further investigation is required to pinpoint the exact source. Experimentation with different hardware and software combinations helps determine the root cause.
Resolving VCDS Coding Issues
Based on this experience, troubleshooting Error 31 involves:
- Testing Different Hardware: Trying a different computer, preferably with a different operating system, can help isolate potential hardware or driver conflicts.
- Software Version Compatibility: Experimenting with different VCDS versions might reveal compatibility issues between the software and your operating system or specific vehicle model.
- Checking VCDS Updates and Documentation: Consulting Ross-Tech’s official website for known issues, troubleshooting guides, or updated software versions is highly recommended.
Future attempts to recode the 2017 Golf using the functioning Windows 7 setup will provide more insights into the issue and its resolution. This ongoing investigation highlights the complexities of VCDS coding and the importance of systematic troubleshooting.
