The FT232R USB UART chip is commonly used in VAG-COM cables for vehicle diagnostics. While VCDS software works seamlessly with genuine Ross-Tech cables, using them with third-party applications like ecuExplorer for Subaru diagnostics can be challenging. This article explores the compatibility of a standard VAG-COM KKL 409.1 cable, specifically those utilizing the FT232R chip, with ecuExplorer.
ecuExplorer, an open-source Subaru diagnostic and data logging program, often requires a KKL 409.1 VAG-COM cable. While clone cables are readily available, using a genuine Ross-Tech cable with the FT232R USB UART interface is preferred for reliability. However, connecting a genuine Ross-Tech Hex+CAN cable to a computer with VCDS installed may prioritize communication with VCDS software, potentially hindering ecuExplorer’s functionality.
This conflict arises because the FT232R chip creates a virtual COM port that VCDS automatically recognizes. When both VCDS and ecuExplorer are installed, the system might default to VCDS, preventing ecuExplorer from establishing communication with the Subaru ECU.
A potential solution is to temporarily uninstall VCDS. However, concerns arise about reinstallation and potential software lockout. Reinstalling VCDS should not pose significant issues as long as the license is valid and properly registered. Ross-Tech provides clear instructions for reinstalling their software without jeopardizing the license.
Alternatively, users can explore adjusting communication port settings within ecuExplorer to specifically target the COM port assigned to the FT232R based VAG-COM cable. This may require identifying the correct port number through the device manager in Windows.
While a genuine 409.1 cable offers the most reliable connection, successfully using a Hex+CAN cable with ecuExplorer depends on correctly configuring the software and ensuring no communication conflicts with VCDS. Experimenting with port settings and temporarily disabling or uninstalling VCDS might be necessary to establish a successful connection. Remember that factory Subaru diagnostic tools may not provide the depth of information offered by ecuExplorer when paired with a compatible VAG-COM cable leveraging the FT232R USB UART chip.
