Run the PSA Interface Checker Install.exe . This typically creates three shortcuts on your desktop.
The software is designed to manage the internal state of your VCI (Vehicle Communication Interface) through several key functions: psa interface checker 4.4.0
Connect your Lexia interface to your computer via USB. Note that connection to the vehicle's OBD port is usually not required for firmware flashing. Run the PSA Interface Checker Install
Support for newer Windows environments, including Windows 10 and 11. psa interface checker 4.4.0
Different versions of Diagbox require specific firmware versions. While Diagbox often upgrades firmware automatically, the PSA Interface Checker is critical for manually downgrading firmware to maintain compatibility with older software like Lexia 3 or PP2000.