If you are using the PSA Interface Checker and notice that your device is not holding the 440 firmware, or if it reverts to a "Rev B" status, this usually indicates:
: It allows users to check if their hardware is a "Revision B" or "Revision C" unit, which determines whether the device can communicate with newer vehicles using CAN interfaces. Using the Software
Click the "Activate" button. The application will scan the USB port for the interface. Check Output: Version: Should show something like 4.4.0 or 4.3.x . Reference: Should display the reference number. psa interface checker 440 verified
When a diagnostic interface displays firmware version 4.4.0 and is marked as “verified,” it indicates that the interface is properly configured and compatible with these relatively recent versions of the DiagBox software. The “440 verified” status confirms that the interface firmware is current enough to work with modern PSA vehicle electronics while remaining compatible with the diagnostic software suite.
The Interface Checker bypasses DiagBox to perform several core tasks: If you are using the PSA Interface Checker
If it reads V4.2.0 or shows a series of question marks, your firmware is outdated or corrupted. Step 4: Flash the "Verified" Firmware File To update the tool so it works seamlessly with Diagbox v9:
: Users can manually "flash" the interface to a different firmware version to solve communication errors with specific vehicle modules, such as the ECU. Check Output: Version: Should show something like 4
The tool is an indispensable resource for any technician using Diagbox. By verifying that your VCI is running the appropriate, updated firmware, you eliminate the guesswork associated with connection failures, ECU communication problems, and faulty programming. Ensuring your interface passes this check guarantees that you can perform advanced diagnostics, coding, and programming on Peugeot, Citroën, and DS vehicles.
Look for the driver folder within the extract, often named Drivers OBD2 or ACTIA USB Drivers . If your PC doesn't recognize the connected Lexia 3 tool in the Device Manager, manually install these drivers.