Look at the device indicator light. It should flash briefly and then stay solid or turn off, depending on your firmware version. Step 3: Verify the Driver in Device Manager To ensure your computer recognizes the hardware correctly:
Many online forums incorrectly suggest using a generic “Psa Xs Evolution” driver. However, the revision includes modified timing parameters for a slower external clock (12 MHz instead of 20 MHz). Using the wrong driver version results in:
Modern versions of Diagbox (v7.xx, v8.xx, and v9.xx) run on 64-bit systems. However, older driver signatures often conflict with 64-bit Windows enforcement policies, requiring specific installation workarounds.
| ❌ | ✅ What is actually correct | |-----------------------------|---------------------------------| | “It‘s a driver for a POS58 thermal receipt printer.” | It is a Windows USB driver for the 9780.Z5 Vehicle Communication Interface (automotive diagnostic tool). | | “The driver is called ‘9780.Z5 Driver’.” | The driver is a generic USB COM port driver (often labelled “USB COM Board Evolution Driver”). The number 9780.Z5 is the hardware reference of the VCI, not the name of the driver. | | “You can download the driver from any random website.” | It is safest to obtain the driver from the original DVD, a trusted forum thread, or the manufacturer‘s support page. Beware of malware. | | “The driver works on any Windows version out of the box.” | It works best on Windows XP SP3 and Windows 7 32‑bit . Windows 10/11 often require a VMware virtual machine. | | “Once the driver is installed, any version of DiagBox will work.” | No – clone 9780.Z5 units are incompatible with DiagBox 9.xx. Stick to DiagBox 7.83 for reliable operation. |
Avoid downloading “PSA XS Evolution Driver” from random file‑hosting websites. Malware disguised as diagnostic software is common. Prefer archives shared by long‑standing forum members or verified community threads. Psa Xs Evolution 9780.z5 Driver
What are you using (e.g., Windows 10 64-bit)?
: Most users find the interface most stable on 32-bit versions of Windows, though newer software versions support 64-bit Windows 10 and 11. Troubleshooting & "B" Serial Issues
Click and browse to the standard ACTIA directory installation path. Usually, this is found at: C:\APPLIC\LEXIA\EXE\ or C:\AWRoot\bin\fi\ Look for a file named ACTIUSB.inf or inst_actia32.inf .
An open-source project on GitHub (archived as “libpsa9780” by user @retroautomator) provides a userspace driver that communicates via raw USB-serial (FTDI) to a modified 9780.z5. To use it: Look at the device indicator light
Managing the drivers for this hardware can be challenging because it relies on older software architectures like , PP2000 , and DiagBox . This guide covers how to install the PSA XS Evolution 9780.Z5 driver and ensure stable communication between your PC and the vehicle's ECU. What is the PSA XS Evolution 9780.Z5?
: In Device Manager, the interface is typically identified as an "ACTIA USB Devices" entry or specifically as the "USB Com Board Evolution Driver" .
It features built-in support for K-Line multiplexers, CAN-BUS, and SAE J1850 (PWM/VPW), covering nearly all PSA models from 1995 to the present. Software Compatibility: It is designed to work with (Citroën), and (Peugeot) software. Critical Hardware Tip: "Full Chip" vs. Standard
With a stable driver setup, you are fully equipped to read fault codes, program replacement keys, reset service indicators, and force DPF regenerations confidently. | ❌ | ✅ What is actually correct
If Diagbox opens but claims the interface is disconnected despite the driver looking fine in Device Manager:
| Potential cause | Solution | |----------------|----------| | DiagBox 9.xx often contains firmware updates that corrupt or disable clone 9780.Z5 units. | Uninstall DiagBox completely. Use a cleaner tool (e.g. “DiagBox Uninstaller 101”) to remove registry traces. Then install DiagBox 7.83 or 7.85 instead. | | Incorrect COM port number. The diagnostic software expects the VCI on a specific COM port (usually COM1–COM4). | Open Device Manager, note the COM port number assigned to “USB COM Board Evolution”. If it is COM5 or higher, go to its Properties → Port Settings → Advanced, and change it to COM1, COM2, COM3 or COM4 (whichever is unused). | | Driver conflict from a previous installation. | Use a driver cleaner utility (e.g. DriverStore Explorer) to remove all old PSA USB COM driver entries. Then reinstall the correct driver. | | Firmware corruption. Connecting a clone 9780.Z5 to DiagBox 9.xx may have “updated” its firmware, rendering it inoperable with older software. | This is serious. Some users have recovered their VCI by reflashing the firmware using PSA Interface Checker and a known‑good firmware file (often shared on forums like NLC‘s thread). Others find the VCI permanently dead and must buy a replacement. | | Windows driver signature enforcement blocking the driver. | On Windows 7/8/10, reboot and select “Disable Driver Signature Enforcement” from the F8 boot menu before reinstalling. |
This points to corrupt driver configurations or failing firmware. Use the Interface Checker to re-flash the microprocessor firmware, or uninstall the device from Device Manager entirely, unplug it, reboot, and follow the manual driver selection path again. Conclusion