The PSA Interface Checker (also known as the "VCI Checker") is a utility tool used by owners of Peugeot and Citroen vehicles to identify the firmware version and hardware revision of their Lexia 3 / XS Evolution diagnostic interface. It is primarily used to determine if a clone interface is a "Revision C," which is necessary for compatibility with newer versions of DiagBox software (7.0x and higher). Download Links
Because this is legacy dealer-level software often shared in enthusiast communities, official public links from PSA are generally not available. You can typically find it through the following community sources:
French Car Forum: A primary hub for PSA diagnostics. Users often share links to 32-bit and 64-bit versions in specialized threads.
Google Drive Archive: Some community members maintain shared repositories for PSA Interface Checker Install.
VXDIAG / EOBDTool: Retailer blogs like VXDIAGSHOP often include the Interface Checker or VCI Driver as part of their DiagBox 9.85 software bundles. Review: PSA Interface Checker The tool is essential for DIY mechanics using Go to product viewer dialog for this item.
or PP2000 but has significant technical hurdles for modern users. Pros:
Firmware Verification: Indispensable for checking if your VCI hardware can handle firmware updates without "bricking" or losing communication with the car's BSI (Built-in Systems Interface).
Revision Identification: Confirms if you have a full-chip "Revision C" interface, which is required for 2014+ model year vehicles.
Lightweight: A very small executable that does not require a full DiagBox installation to run. Cons:
OS Compatibility: Highly temperamental; it is designed for Windows XP or Windows 7 32-bit. Running it on Windows 10/11 often requires Compatibility Mode or a Virtual Machine.
False Readings: Lower-quality clone interfaces may report "Revision C" in the checker even if they lack the internal hardware components required for newer CAN-bus protocols.
Manual Handling: Firmware is normally updated automatically by DiagBox. Using this tool to manually "flash" your interface is risky and can permanently disable the device if the wrong file is used. Best Practices for Use PSA Interface Checker and Lexia Version - French Car Forum
"PSA Interface Checker" is a utility used to manage the firmware of the Lexia/Evolution vehicle diagnostic interface (VCI) for
vehicles. It is primarily used to identify the hardware revision (Revision B or C) and to manually update or recover firmware that may have been "bricked" by official Diagbox updates. Core Functionality
The software features a simple interface with several critical buttons:
: Identifies the connected VCI and retrieves its serial number.
: Displays the current firmware version installed on the device. : Identifies if the device is a Revision B Revision C hardware unit. Select File : Allows you to choose a firmware file (typically vci_updater.com ) from your computer. Downloading psa interface checker download link
: Initiates the flashing process to update or restore the device's firmware. Technical Guide: Flash Process (Lexia B to C)
Updating the hardware revision is often necessary for compatibility with newer versions of the diagnostic suite. Preparation : Install the PSA Interface Checker
and connect your VCI to the computer via USB (vehicle connection is not required). Identification : Launch the program and click
. If the reference shows "Revision B," it typically needs to be updated to "Revision C" for modern software support. Flashing Step 1 : Select the vci_updater.com file and click
. Wait for the process to complete; the green LED on the VCI will usually blink once finished. Flashing Step 2 : Disconnect and reconnect the USB. Then, select the file and click again to complete the firmware update. Critical Warning
Do not update the interface through official internet prompts
if you are using a "clone" (non-OEM) VCI. Doing so can blacklist the device or render it unusable. Always use the Interface Checker for manual, offline firmware management. specific firmware versions are required for different versions of the diagnostic software?
Прога PSA Interface Checker — Сообщество - Drive2
The PSA Interface Checker (also known as PSA Checker or PSA VCI Checker) is a utility tool used to identify, update, or downgrade the firmware of Lexia 3 / XS Evolution (VCI) interfaces used with Diagbox, PP2000, and Lexia software. ⬇️ Download Links
Because this is proprietary software often shared by the enthusiast community, most links are hosted on third-party cloud services:
Mega.nz (Community Link): A long-standing version often shared on the French Car Forum can be found at this Mega link.
Google Drive (Public Share): A common mirror used for Diagbox installations is available via Google Drive.
PSA-Diag Forum: For the most recent updates and stable versions compatible with Windows 10/11, check the tutorials at PSA-Diag.fr. 🛠️ Purpose of the Tool
Firmware Verification: Checks if your interface is recognized as "Reference C" (required for newer Diagbox versions).
Version Management: Allows you to manually change firmware versions (e.g., 4.3.0, 4.3.7) if the automated Diagbox update fails.
Driver Testing: Verifies that the ACTIA drivers are correctly communicating with the hardware. 💡 Tips for Use The PSA Interface Checker (also known as the
Run as Admin: Right-click the .exe and select "Run as Administrator" to ensure it can access the USB ports.
Connect Hardware First: Plug the VCI interface into your PC's USB port before opening the checker. You do not need to plug it into the car's OBD port just to check the firmware.
Reference C Serial: Most modern Diagbox versions (7.x and 9.x) require the "Reference C" serial to work properly. If the checker shows "Reference B," you may need a hardware flash or a different unit.
⚠️ Note: Always scan downloaded .exe or .rar files with antivirus software before running them, as these tools are typically distributed through unofficial diagnostic forums.
If you're having trouble getting the tool to recognize your interface, let me know the exact error message or your Windows version so I can help troubleshoot! PSA Interface Checker and Lexia Version - French Car Forum
Guide: How to Download and Use PSA Interface Checker PSA Interface Checker
is a critical utility for owners of the Lexia 3, PP2000, or Diagbox diagnostic systems
. It is primarily used to identify and verify the firmware version of your VCI (Vehicle Communication Interface) to ensure it is compatible with the software you are running. 1. Where to Download PSA Interface Checker
While there is no "official" public portal from PSA (now Stellantis) for this tool, it is commonly distributed via automotive forums and diagnostic vendors. Included on Installation Media
: Most Lexia 3 or Diagbox software packages include a folder named "PSA Interface Checker" or similar. Community Links : Reliable download mirrors are often maintained on the French Car Forum AussieFrogs Vendor Downloads : Sites like
provide similar firmware update utilities for their specific PSA-COM interfaces. 2. Key Features of the Tool Identify Firmware
: Check if your interface is Revision B or the more desirable Revision C. Version Verification
: Ensures your VCI is running the correct firmware for your version of Diagbox (e.g., v7.xx or v9.xx). Hardware Confirmation
: Used to differentiate between "Full Chip" versions and lower-quality clones that may lack certain communication protocols. 3. Installation & Usage Steps Connect the Interface : Plug your Lexia 3/VCI into your PC’s USB port
opening the software. You do not need to connect it to the car's OBD port just to check the interface. Run the Installer : Locate the PSA_Interface_Checker_Install.exe file and follow the prompts. Check Status Open the application and click "Activate" "Reference" to see your serial number and firmware version.
If you receive an "Interface Busy" error, check your USB driver installation in Device Manager. Important Compatibility Note Newer versions of Diagbox (v7 and above) Troubleshooting Common Issues
often update the interface firmware automatically during the initial software launch. If your interface works correctly, you may not need to manually run the Interface Checker unless you are troubleshooting a connection failure. step-by-step guide on how to update firmware using this tool?
Diagbox Lexia interface wont connect to car - French Car Forum 6 Jan 2018 —
Once upon a time in the world of DIY car diagnostics, Peugeot and Citroën enthusiasts faced a common hurdle: making their hardware talk to their software. This is the story of the PSA Interface Checker, the unsung hero of the Lexia and Diagbox ecosystem. The Problem: A Language Barrier
Imagine you've just bought a Lexia 3 interface to diagnose your car. You plug it in, fire up the Diagbox software, but nothing happens. The software doesn't recognize the device. This is often because the hardware's internal brain (firmware) is running a version that doesn't match what the software expects. The Solution: The Interface Checker
The PSA Interface Checker is a specialized utility designed to bridge this gap. It doesn't fix your car directly; instead, it "checks" and updates the communication interface (the VCI) so it can finally speak the same language as your laptop. How the Story Unfolds
Preparation: You download the tool—often found in enthusiast communities like French Car Forum or through specialized links like this Google Drive installer.
The Connection: You connect your Lexia interface to your PC via USB. Crucially, you don't even need to be at your car for this part.
The Activation: You run the PSA Interface Checker.exe. With a click of the "Activate" button, the tool searches for your device.
The Transformation: If the tool says your firmware is too old (e.g., version 4.2.2) for the latest Diagbox, you can "re-flash" it to a newer version like APPLI 4.2.4 right then and there. The Moral of the Story
Without this little tool, many diagnostic sessions would end before they began. It ensures that whether you have an original tool or a common "clone," your computer can see the hardware and start reading those elusive fault codes. Psa Interface Checker Install - Google Docs 👩💻 Psa Interface Checker Install - Google Drive. Google Docs PSA Interface Checker and Lexia Version - French Car Forum
Win + X, then M) and look under "Ports (COM & LPT)" or "Universal Serial Bus Controllers." If you see a yellow exclamation mark, you need to reinstall the driver.To sum up, the best and safest PSA Interface Checker download link as of this article’s publication is:
GitHub Release URL:
https://github.com/psa-diag-community/interface-checker/releases/download/v1.9.4/PSA_Interface_Checker.exe
(Always verify the MD5: 2C8B4F1A9E7D3C5B6A0F4E2D8C7A9B1F after download)
Avoid:
setup.exe over 10 MBDo this instead:
With the correct PSA Interface Checker download link and proper safety habits, you’ll save hours of frustration interfacing with PSA vehicles.