: Must be used while the interface is powered via USB; connection to the vehicle is generally not required for firmware checking but may be needed for certain activation sequences.
: Using the "Version" button to see the existing firmware version. File Selection : Navigating to the
Open Windows Device Manager. Ensure the tool appears under "Universal Serial Bus controllers" as "ACTIA USB Devices" or "Evolution Driver." If it shows a yellow warning triangle, reinstall the driver files included with your software package. 2. Failed Flash / Initialization Error
Read the output box. If your tool displays an older application version (e.g., APPLI_XS_Fuji_P10538A ), you may need an update for modern Diagbox builds. Step 4: Updating the Firmware psa interface checker 4.4.0
Many diagnostic interfaces sold online are "Lite" clones (Revision B). While these work on older Peugeot/Citroën vehicles, they often fail to communicate with the CAN-bus architecture found in newer cars (e.g., post-2010 models like the Peugeot 308 or Citroën C5).
Even with a stable release, issues occur. Here are the top five error codes in 4.4.0 and how to fix them.
Plug your Lexia 3 interface into your computer via USB (connection to the car is usually not required for the checker tool). : Must be used while the interface is
: If DiagBox fails to detect the VIN, the checker confirms if the PC is actually communicating with the VCI via the USB port. System Requirements and Setup
If you are upgrading from version 4.3.x or older, here is what 4.4.0 brings to the table:
If you own or service Peugeot, Citroën, DS, or Opel/Vauxhall vehicles, you know that specialized diagnostic tools are essential. The is a critical software utility used by automotive technicians and DIY enthusiasts to manage, update, and troubleshoot the hardware firmware of Lexia 3 and XS Evolution diagnostic interfaces. Ensure the tool appears under "Universal Serial Bus
Click to flash the new firmware to the interface. Troubleshooting Common Errors
You are attempting to flash a high-version firmware onto a low-quality "Lite" clone interface that lacks the full Microchip AN2131QC or Fujitsu command architecture.
PSA Interface Checker is a dedicated Windows utility that serves as the bridge between your computer and the diagnostic interface cable (commonly known as Lexia or PP2000). This cable connects to your vehicle's OBD-II port, allowing diagnostic software like DiagBox to communicate with the car's electronic control units (ECUs).