Memoscan U581 Go to product viewer dialog for this item. is a popular OBD-II/EOBD scanner used for reading and clearing diagnostic trouble codes (DTCs) in modern vehicles. Keeping your device's software updated ensures compatibility with the latest vehicle models and provides access to new diagnostic definitions. Official Memoscan U581 Update Software Requirements
To perform a successful update, you typically need the following: Operating System: Windows PC (XP, 7, 8, or 10). Hardware: Memoscan U581 unit and a USB data cable (not just a charging cable).
Update Tool: The official UIF-ISP or Uplink software application.
Update Files: Firmware files typically ending in the .uif extension. How to Download and Install Memoscan U581 Update Software
The official source for these updates is UIF Technology, the manufacturer of Memoscan products.
Download the Software: Visit the manufacturer's support page or an authorized distributor to download the newest version of the update tool (often called the "UIF-ISP" programmer).
Prepare the Scanner: Connect your U581 to your computer using the USB cable. Do not turn on the scanner's power yet.
Run the Update Tool: Launch the UIF-ISP.exe program on your computer. If prompted, select the correct COM port.
Select Update File: Click the "Open File" button in the software and select the latest .uif firmware file you downloaded.
Initiate Update: Click "Update" in the software. Only now should you switch the power of the Memoscan scanner to "ON".
Wait for Completion: A progress bar will appear. Once it reaches 100%, the software will display an "Update Successful" message. Troubleshooting Common Update Issues
"Disconnected" Status: Ensure you are using a USB data cable; many generic cables only carry power. memoscan u581 update software download new
Antivirus Interference: Disable your antivirus software temporarily during installation, as it may block the diagnostic drivers.
Connection Failure: If the connection fails, restart the process, try a different USB port, and ensure the scanner is powered off before clicking the update button. Key Features of the Newest U581 Firmware Updating your U581 to the latest version typically enables:
Enhanced Live Data: Better real-time monitoring of RPM, fuel trim, and oxygen sensors.
Broader Protocol Support: Full compatibility with CAN-BUS and ISO9141 protocols found in newer 2020-2025 vehicles.
Extended DTC Database: Access to more manufacturer-specific trouble code definitions.
Plug the U581 into your vehicle’s OBD2 port. Turn the ignition to ON. Verify:
If you cannot find an active link, the reality is that the hardware may have reached its end of life regarding software updates. The updates available usually only cover vehicles up to the 2013 model year and do not support newer CAN-BUS protocols found in cars built after 2015.
To update your Memoscan U581 OBD-II scanner, you need to download the official update tool and drivers from the manufacturer's portal. Keeping your firmware current ensures compatibility with newer vehicle models and resolves common issues like vague error codes or system reading failures. How to Update Your Memoscan U581 Go to product viewer dialog for this item.
Download the Software: Visit the official Memoscan website to download the "UIF-ISP" update tool and the required USB drivers, such as CH341SER.EXE. Install Drivers
: Run the driver installer on your computer. Note that older versions of the tool are often most stable on Windows XP, though modern versions may support newer OS environments. Prepare the Scanner: Connect the
to your PC using the included USB cable. You do not need to power the scanner via the vehicle for this process. Run the Update Tool: Open the UIF-ISP software. Memoscan U581 Go to product viewer dialog for this item
Select the correct COM port and click "Open File" to load the latest firmware update (typically an .uif file).
Click "Update" and wait for the scanner to connect and the progress bar to complete.
Finalize: Once "Update successful" appears, disconnect the scanner and restart it to apply the new changes. Troubleshooting and Maintenance
Connection Fails: If the software fails to recognize the scanner, double-check your COM port selection in the Device Manager or re-run the driver installation.
Antivirus Issues: Temporarily disable antivirus software during installation, as it can sometimes block the driver from properly initializing.
Hardware Care: Regularly inspect the OBD-II pins for debris or corrosion to ensure a reliable connection during both updates and vehicle diagnostics. Upgrading software
Finding the right software for your Memoscan U581 can feel like a bit of a treasure hunt since the official manufacturer’s site is often unreachable or outdated. To successfully download and update your device, you’ll need a few specific components and a bit of a "vintage" tech setup. Where to Find the Software
Because the main domain for Memoscan (memoscan.cn) is frequently offline, users often rely on archived mirrors and community repositories:
Archived Files: You can find critical update files like U581 HD4.5 SW5.2 ENGLISH.rar and the manual on community-hosted directories like AlvaresTech.
Alternative Support: Some vendors on platforms like AliExpress provide "Free Update Online" support, often by sending a download link or login credentials upon request. The "Complete Story" of Updating Your U581
Updating this specific scanner isn't as simple as modern "plug and play" devices. Here is the step-by-step process based on user manuals and community guides: It reads VIN correctly
Prepare a Retro Environment: Most U581 update tools are designed for older operating systems. Many users report that the software specifically requires Windows XP to run correctly. Install the Drivers:
Download the CH341SER.EXE file (USB-to-Serial driver) and the REGMSCOMM.exe registration tool.
Install these first so your PC can "see" the scanner when it's plugged in via the USB update cable. Run the ISP Tool: Open the update tool (often named UIF-ISP.exe).
Select the correct COM port assigned to your scanner in the software settings. Load the Firmware:
Click "Open File" and select the firmware update file (typically with a .uif extension). Initiate the Handshake:
Press the "Update" button in the software first, then power on the Memoscan U581. The screen should show it is trying to connect with the PC. Complete the Flash:
Wait for the progress bar to finish. Once successful, restart the scanner to apply the new firmware changes. Important Tips
Hardware First: Ensure you are using the specific USB update cable that came with the unit; standard USB cables may not always work for data transfer on these older models.
No Power Needed Initially: You generally do not need to power the scanner on until after you have hit the update button in the PC software to initiate the connection.
A failed update can turn your Memoscan U581 into a paperweight. Follow these prerequisites religiously.