Identifying if a device is Revision B or Revision C (Full Chip).
The numbering system for the PSA Interface Checker follows a specific pattern that maps directly to the corresponding DiagBox software versions. represents a significant milestone in the tool's evolution. psa+interface+checker+440+2021
Used for older Peugeot models. Lexia 3: Used for older Citroën legacy models. Identifying if a device is Revision B or
Ensure the USB driver ( Actia USB Device ) is properly installed in the Device Manager before running the interface checker. Used for older Peugeot models
The Interface Checker will read out a firmware version string (e.g., APPLI_XS_Fuji_P106138A@V4.3.7 or V4.4.0 ), confirming whether your interface is recognized by the computer as a device. Be aware that low-quality clones can trick the tool into displaying a fake "Revision C" label even when missing key components required for modern multiplexed networks. Step-by-Step Guide to Using PSA Interface Checker
One of the primary reasons automotive enthusiasts use the PSA Interface Checker is to verify the hardware capabilities of third-party Lexia 3 clones purchased online. Feature / Detail Full Chip Interface Lite / Low-Cost Clone Displays as 921815 C/ May display as 921815 B/ or fake C Optocouplers Present (protects car & laptop circuits) Omitted or bridged with resistors Microcontroller High-quality Samsung/Fujitsu chip Downgraded or generic alternative Diagbox Evolution Works seamlessly with Diagbox V7, V8, and V9+ Frequently fails or freezes on newer cars
The is a specialized utility designed to manage the firmware of the Lexia 3 (Actia XS Evolution) diagnostic interface . It is a critical tool for technicians and enthusiasts working with Peugeot , Citroën , DS , and newer Opel/Vauxhall vehicles through the Diagbox software suite. What is PSA Interface Checker?
