The installation of PolarFIS, a third-party device for Volkswagen Audi Group (VAG) cars, can sometimes lead to unexpected behavior with the car’s module system. One common observation is the installation of module “77-Telephone” in the CAN Gateway during the PolarFIS activation process. This article explores this phenomenon and discusses its implications, based on user experiences and troubleshooting steps.
PolarFIS and Unexpected Module Installation
When PolarFIS is enabled, it often adds module 77 to the CAN Gateway list, detectable via a VCDS scan. Interestingly, this module doesn’t appear essential for PolarFIS operation. Tests have shown that even after unticking module 77 in the CAN Gateway using VCDS, PolarFIS continues to function flawlessly, including Bluetooth phone functionality. Subsequent auto-scans confirm the absence of module 77 and reveal no fault codes. This raises questions about the necessity of module 77 for PolarFIS.
Module 77 Reinstallation Trigger
Further investigation reveals that module 77 is reinstalled only when PolarFIS is switched off and then back on. This action is performed within the MFD/MFI under PolarFIS menus for switching off, and by holding the OK button on the MFSW for at least 10 seconds to switch it back on. Simply restarting the car or letting the control modules go to sleep doesn’t trigger the reinstallation. This specific on-off sequence appears to be the sole trigger.
Uninstalling Module 77 with VCDS
While module 77’s presence doesn’t seem detrimental, users can uninstall it using VCDS if desired. This provides a workaround for those concerned about having unnecessary modules in their CAN Gateway listing. The process involves using VCDS to access the CAN Gateway settings and manually removing module 77.
Potential Explanation and Support Ticket
The reason for PolarFIS installing module 77 remains unclear. It could potentially be a bug within the PolarFIS software. A support ticket has been raised with Auto Polar, the developers of PolarFIS, seeking clarification on this behavior. Their response, once received, will be shared to shed light on this issue.
Conclusion
The installation of module 77 in the CAN Gateway during PolarFIS activation raises questions about its purpose and necessity. While the module can be safely removed with VCDS without affecting PolarFIS functionality, understanding the reason behind its installation is crucial. The pending response from Auto Polar should provide valuable insights into this peculiarity and potentially lead to a software update addressing the issue. This information can help users better understand their Vcds Module List and manage their vehicle’s system.
