Right-click the unknown device in Device Manager -> Select Update Driver -> Browse my computer for drivers . Point the search path directly to the Diagbox installation directory (usually C:\AWRoot\bin\fi\ drivers or C:\APPLIC\L3\Driver ). Issue 2: Driver is Blocked Due to Missing Digital Signature
To confirm the driver is communicating with a Revision C interface, right-click , select Properties , go to the Details tab, and choose Hardware Ids from the dropdown menu. You should see text strings indicating the device firmware profile. How to Check and Update Interface Firmware
I can then provide tailored steps to get your interface up and running. actia psa interface driver
Open Device Manager, right-click your Actia device, go to Properties , select the Power Management tab, and uncheck "Allow the computer to turn off this device to save power." Best Practices for a Stable Diagnostic Setup
| Feature | | Actia Core XS | Actia Multi-Diag Access | | :--- | :--- | :--- | :--- | | Primary Use | Specialist tool for deep diagnostics, coding, and adaptation on PSA Group vehicles [2†L26-L27]. | Modern, universal diagnostic tool for OEM software and J2534 passthru ECU programming [13†L33-L35][18†L13-L14]. | Multi-brand diagnostic tool ideal for general workshops to service a wide range of vehicles [18†L16-L18]. | | Software | Works primarily with DiagBox , the official PSA software [11†L21-L23]. | Works with various OEM software (VAG, BMW) and J2534-based programming tools. | Uses its own Multi-Diag software, offering coverage for many brands. | | Driver Family | "ACTIA USB PassThru2 Driver," "USB Com Board Evolution Driver" [14†L4-L5][14†L36-L37]. | "Core XS 5H5xx" driver family [13†L4-L5]. | Typically uses a standard J2534 passthru driver included with its software. | Right-click the unknown device in Device Manager ->
The Windows system file ( Lyra or UMDF drivers) that allows Windows to recognize the hardware interface when plugged into a USB port. Pre-Installation Requirements
If you are using a clone interface, Windows may block the driver. Hold the key while clicking Restart in Windows. You should see text strings indicating the device
Plug the Actia PSA interface into a on your computer. (Avoid USB 3.0 blue ports if possible, as legacy drivers often struggle with USB 3.0 controllers). Wait for the Windows hardware detection sound.
Are you using a device or a Lexia 3 clone , and which Windows version are you running? Support - ACTIA IME