Actia Psa Interface Driver ((full)) -
Use a third-party tool called PSA Interface Checker . Load the tool, check your current version, and flash the compatible firmware version (such as V4.3.7) to match your Diagbox release. Driver Disappears After Windows Update
Disconnect the interface. Uninstall the device from Device Manager entirely. Reboot your PC. Try plugging the interface into a different USB port, preferably directly into the motherboard rather than a USB hub.
Drivers are compatible with Windows XP, Windows 7 (32/64-bit), Windows 10, and Windows 11.
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DiagBox itself will also attempt to auto-update the interface's firmware when launched and connected to a car. Many users choose to disable this automatic feature, as an auto-update can sometimes revert a working "C" interface back to a non-working "B" state, causing connection problems.
| | Connection | Features | | ----------------------- | -------------------- | ------------------------------------------------- | | ACTIA PSA XS (USB only) | USB 2.0 (Type B) | Basic, for older PSA (<2015) | | ACTIA PSA XS Pro | USB + WiFi (802.11n) | Multi‑protocol, secure gateway bypass (SGW) | | ACTIA PAS 100 | USB / BLE / WiFi | Full PSA G2/G3 support, high‑speed CAN FD, DoIP | | ACTIA Multi‑Diag | USB / Ethernet | Shared with Renault, Nissan, Toyota |
Use the PSA Interface Checker or the Link to PSA Interface USB app to switch between modes like wiTECH and DiagBox . System Requirements actia psa interface driver
Many users struggle because their interface is "Revision B," while newer versions of Diagbox (v7.xx and v9.xx) require .
To update, select the appropriate firmware file (e.g., APPLI.6.3.2 or APPLI.4.3.4 depending on your DiagBox version).
Once successfully installed, the device should no longer have a warning icon. It will typically be listed under one of two headers: →right arrow USB Com Board Driver (Multi-Instance) Universal Serial Bus controllers →right arrow UMDF driver for Actia Com Board Checking and Updating Adapter Firmware Use a third-party tool called PSA Interface Checker
Browse to your Diagbox installation directory. The standard path for driver files is: C:\AWRoot\bin\fi\ or C:\APPLIC\L3\Driver\
The Actia PSA interface acts as a translator between your vehicle’s OBD2 port and your laptop’s USB port. It is primarily used with OEM-level diagnostic software suites:
The legacy diagnostic software primarily used for older Citroën vehicles. Uninstall the device from Device Manager entirely
Many drivers and software versions fail because the interface is a "clone" (replica) rather than an original Actia unit.
Install DiagBox or the VCI Setup Utility as an administrator before connecting the hardware.