Upgrading your car’s infotainment system with an RNS 315 offers features like navigation and Bluetooth connectivity. However, retrofitting this unit, especially in older Volkswagen models, can present challenges. This guide focuses on activating Bluetooth on an RNS 315 using VCDS, addressing common issues and providing solutions.
Common Issues and Troubleshooting Steps for RNS 315 Bluetooth with VCDS
A frequent problem encountered when installing an RNS 315 in a vehicle not originally equipped with it is the absence of Bluetooth functionality. This typically involves a 2008-2015 Volkswagen model using VCDS for coding. One common scenario involves a “Request out of range – coding rejected” error (Error 31) when attempting to uncheck byte 3 bit 5 in the Navigation module to activate the internal Bluetooth transceiver. This error often stems from incompatibilities between the RNS 315 and the car’s CAN gateway.
Troubleshooting Steps:
- CAN Gateway Compatibility: Older CAN gateways often struggle to communicate correctly with the newer RNS 315. Upgrading to a newer CAN gateway, such as part number 7N0907530AJ (or later), is usually necessary.
- VCDS Coding: After installing the new CAN gateway, ensure it’s correctly coded to match the vehicle’s features. Double-check each option against the original gateway’s coding. Note that the coding menu structure might differ between older and newer gateways.
- Bluetooth Module Activation: In VCDS, navigate to the Navigation module (typically address 37). Attempt to uncheck byte 3 bit 5 to activate the internal Bluetooth. If Error 31 persists, review the coding of both the CAN gateway and the Navigation module for any discrepancies.
- Wiring and Microphone: Verify that the Bluetooth microphone is correctly wired and connected to the designated pin on the RNS 315’s wiring harness.
- Fault Code Analysis: Scan for fault codes in both the CAN gateway (address 19) and Navigation module (address 37) using VCDS. Address any “Incorrectly Coded” errors before proceeding. Common related fault codes include 01044 in the CAN Gateway and 1048641 in the Navigation module.
Understanding VCDS and RNS 315 Coding
VCDS (Vag-Com Diagnostic System) is a powerful diagnostic and coding tool for Volkswagen, Audi, Seat, and Skoda vehicles. Understanding its use is crucial for activating Bluetooth on the RNS 315. The coding process involves modifying specific bits and bytes within the control modules to enable or disable features. Each bit and byte corresponds to a specific function, and incorrect coding can lead to malfunctions or feature inactivation.
Further Considerations for RNS 315 Retrofit
- MFSW Compatibility: While Bluetooth activation is often achievable, Multi-Function Steering Wheel (MFSW) button compatibility for controlling the RNS 315 (e.g., volume, phone mute) can vary depending on the vehicle’s year and model. Research compatibility before attempting integration.
- Antenna Adapter: Using the correct antenna adapter is essential for optimal radio reception. Ensure the adapter matches both the vehicle’s antenna connection and the RNS 315.
Conclusion
Successfully activating Bluetooth on a retrofitted RNS 315 requires careful attention to CAN gateway compatibility, proper VCDS coding, and correct wiring. By addressing common issues and following the troubleshooting steps outlined in this guide, you can enjoy the convenience of Bluetooth connectivity with your upgraded infotainment system. Remember to consult reputable online forums and resources for model-specific guidance if necessary.
