Many Volkswagen owners utilize VCDS (Vag-Com Diagnostic System) to customize their vehicles. A common modification is disabling the Start/Stop system. While this process is often straightforward, some Tiguan 2 models present challenges. This article explores a specific issue encountered when attempting to disable Start/Stop on a 2020 Tiguan 2 using VCDS and offers potential solutions.
Common VCDS Start/Stop Disable Method
Traditionally, disabling the Start/Stop system on various Volkswagen models (Passat, Golf, Tiguan Allspace, Skoda Octavia) involved adjusting the voltage limit within the CAN gateway settings using VCDS. A voltage limit of 12.1V typically triggered the system to remain off and display a corresponding message in the vehicle’s menu indicating a limitation.
The 2020 Tiguan 2 Challenge
A 2020 Tiguan 2, despite accepting the modified 12.1V voltage limit in the CAN gateway via VCDS, exhibited persistent Start/Stop functionality. No error messages or limitations related to Start/Stop appeared in the car’s menu. This suggests a change in the system logic for this specific model year. The user successfully implemented changes to the run lock, indicating proper VCDS communication and functionality.
VCDS Log File Analysis
The provided VCDS log file offers a comprehensive overview of the vehicle’s control modules and their status. The scan reveals no fault codes across all systems, including the engine (01), CAN gateway (19), and battery monitoring (Subsystem 3 under address 19). This lack of error codes further complicates diagnosing the Start/Stop issue. The log confirms the Tiguan 2’s specifications:
- Model Year: 2020 (indicated by MY2020 in the original post and confirmed by the mileage of 70km)
- Engine: 2.0l BTD (from Address 01: Engine)
- Transmission: DQ500 (from Address 02: Auto Trans)
- CAN Gateway: MQB High 521 5388 (from Address 19: CAN Gateway)
This information is crucial for pinpointing potential solutions specific to this configuration.
Potential Solutions and Further Diagnosis
Several avenues can be explored to troubleshoot this issue:
- Updated Coding: Volkswagen may have implemented revised coding parameters for Start/Stop functionality in the 2020 Tiguan 2. Consulting updated VCDS documentation or online forums dedicated to VCDS modifications could reveal new coding adaptations specific to this model year.
- Alternative Adaptation Channels: The voltage threshold might have been moved to a different adaptation channel within the CAN gateway or a different control module altogether. Thoroughly examining the available adaptation channels in VCDS for modules related to Start/Stop (e.g., Engine, Gateway, Battery Management) is necessary.
- Software Updates: Outdated module software within the Tiguan could be contributing to the problem. Checking for and applying the latest software updates via VCDS might resolve compatibility issues.
- Hidden Menu Exploration: The Tiguan 2 might possess hidden menus accessible through specific button combinations or VCDS adjustments. These menus could offer additional Start/Stop configuration options not visible in the standard interface.
Conclusion
Disabling the Start/Stop feature on a 2020 Tiguan 2 using VCDS requires a deeper investigation than previous models. While the traditional voltage limit modification might not be effective, exploring updated coding procedures, alternative adaptation channels, software updates, and hidden menus could provide a solution. Leveraging online resources and the VCDS community can be invaluable for finding model-specific guidance.
