The Ross-Tech HEX-CAN USB interface, commonly known as VCDS (VAG-COM Diagnostic System), is a powerful tool for diagnosing and modifying Volkswagen, Audi, Seat, and Skoda vehicles. However, some users are interested in using their existing Ross-Tech cable with third-party software like ecuExplorer, a free, open-source program for Subaru diagnostics and data logging. This article addresses common questions regarding compatibility between the Ross-Tech HEX-CAN cable and ecuExplorer.
ecuExplorer reportedly requires a KKL 409.1 VAG-COM cable for communication with Subaru ECUs. While genuine Ross-Tech KKL 409.1 cables may be difficult to find, it’s important to understand that the HEX-CAN interface utilizes a more advanced communication protocol than the older KKL interface. Therefore, directly substituting a HEX-CAN cable for a KKL cable with ecuExplorer is unlikely to work. The HEX-CAN’s CAN protocol is designed for newer vehicle models and may not be backward compatible with the KKL protocol required by ecuExplorer and older Subaru vehicles.
Using a Ross-Tech HEX-CAN cable with VCDS software installed on your computer will prioritize communication with VCDS when the cable is plugged in. This means that even with ecuExplorer running, the HEX-CAN interface will likely default to VCDS. Uninstalling VCDS might allow ecuExplorer to recognize the cable, but it’s crucial to remember that the fundamental incompatibility between the CAN and KKL protocols remains. Reinstalling VCDS should not lock you out of the software, as long as you have a valid license and follow the proper installation procedures outlined by Ross-Tech.
While the Ross-Tech HEX-CAN cable excels in OBD-II diagnostics for compatible vehicles through the VCDS software, it’s not designed for use with ecuExplorer or older KKL-based systems. If in-depth Subaru diagnostics beyond factory capabilities are required, consider investing in a dedicated KKL 409.1 interface specifically designed for compatibility with ecuExplorer and older Subaru models. Using the correct interface will ensure proper communication and avoid potential compatibility issues.
