For automotive technicians and Mercedes-Benz enthusiasts, the Xentry diagnostic system is an indispensable tool. It offers comprehensive diagnostic capabilities for Mercedes-Benz vehicles, covering everything from basic fault code reading to advanced programming and module updates. Understanding the different interfaces compatible with Xentry is crucial for effective vehicle servicing. This article explores experiences with various J2534 passthru devices and sheds light on the role of robust interfaces like Xentry Connect Actia.
Xentry supports a range of vehicle communication interfaces. Historically, it worked with interfaces like Part D (C3), SDconnect (C4), ECOM, and the more modern Xentry Connect (also known as Xentry Kit 2) and Bosch VCI (Xentry Kit 3). These are direct interfaces designed specifically for Xentry and Mercedes-Benz vehicles, ensuring optimal compatibility and performance.
However, Xentry also offers flexibility through its Passthru option. This allows the software to function with generic J2534 passthru devices. Theoretically, this opens up Xentry to a wide array of interfaces, from Mercedes-Benz Passthru VCI to tools like AVDI, VAS5054A, and Drewtech MongoosePro, and even budget-friendly options like VXDIAG passthru and X-horse Toyota VCI. The promise of using readily available and potentially less expensive J2534 devices with Xentry is appealing.
Recent testing explored the real-world performance of several passthru modules with Xentry. The VXDiag VCX Nano for TIS (Toyota Techstream), despite being on its latest firmware and showing initial voltage readings, encountered a “BENZ License Error” when attempting to connect to the vehicle in Xentry. This suggests a deliberate software limitation preventing its use with Mercedes-Benz diagnostics, even though it is advertised as a J2534 passthru device.
VXDiag VCX Nano for Toyota TIS Techstream Compatible with SAE J2534
The OTC VIM for Toyota, believed to be a Bosch device, also faced challenges. Xentry failed to detect car voltage with this interface, reporting a “voltage too low” error, rendering it unusable for diagnostics in this scenario.
In contrast, the Volvo DiCE interface showed more promising results. It successfully communicated with a significant number of modules during a quick test, retrieving software versions and other data. However, some modules, notably the ECU, remained inaccessible, indicating potential protocol limitations or missing functionalities for full Mercedes-Benz diagnostics.
The need to update the firmware of an NTG5s1 module highlighted the importance of DOIP (Diagnostics over Internet Protocol) compatibility. Firmware updates for newer Mercedes-Benz systems often require a DOIP interface. While standard J2534 passthru devices might suffice for basic diagnostics, tasks like firmware flashing may necessitate a more advanced interface. The VXDiag C6, a DOIP-capable device, was considered as a potentially slower but functional solution for this firmware update task.
Experiences with these passthru devices underscore the variability in J2534 implementation and compatibility with Xentry. While some devices may offer basic diagnostic access, they might lack the robustness and full protocol support required for advanced functions like module programming and firmware updates. For professionals requiring reliable and comprehensive Mercedes-Benz diagnostics, investing in a dedicated interface like Xentry Connect Actia or SD Connect DOIP might be a more effective long-term solution. These interfaces are engineered specifically for Xentry, ensuring seamless communication, full protocol support, and the reliability necessary for complex diagnostic and programming tasks. While J2534 passthru offers a degree of flexibility, the optimal Xentry experience, especially for advanced procedures and newer vehicle systems, is often best achieved with dedicated, high-performance interfaces like Xentry Connect Actia.
