The application will scan the USB ports and display text in the status window. It will typically show a reference string like 921815 C/ and the current firmware version (e.g., Appli_XS_Fuji_P106138A V4.3.3 ). Step 4: Flash New Firmware (If Needed)
What does your diagnostic software show when it fails?
Older versions of the interface checker often struggle with newer 64-bit Windows environments or fail to recognize the "Evolution" drivers used by modern Diagbox installations.
Click on (or Version Request ). The application will populate several fields, including: Version: (e.g., APPLI_XS_Fuji_P106138A V4.3.3 ) Reference: (e.g., 921815 C/ ) Psa Interface Checker V3 Download
Because this tool is third-party software used to manage aftermarket diagnostic clones, it is not hosted on official Peugeot or Citroën corporate servers. Where to Look
Allows users to upgrade or downgrade the interface firmware (e.g., changing from V4.3.0 to V4.3.7) to match specific Diagbox software versions.
This usually happens with low-quality "Evolution" clones that lock up under firmware changes. Disconnect the USB, restart your PC, and try flashing an older firmware version first to reset the chip logic. If you need help with the next steps, let me know: The application will scan the USB ports and
Once you have completed the , follow this guide precisely.
Because the PSA Interface Checker is an automotive utility tool often shared within the DIY car tuning and diagnostics community, it is not hosted on an official corporate website.
For or v9.xx , you generally need firmware 4.3.7 or higher. 3. Flash the Interface Older versions of the interface checker often struggle
Right-click the PSA Interface Checker.exe and select "Run as administrator". How to Use PSA Interface Checker V3 (Step-by-Step)
The Complete Guide to PSA Interface Checker V3: Diagnosing Lexia 3 and PP2000 Connection Issues
The text box will populate with data. Look for the line that says .
Note: If the reference ends with "C/", your interface is a full-chip evolution model capable of working with the absolute newest versions of Diagbox. Step 5: Flash New Firmware (Optional)