How to Fix VXDIAG Nano GM Issues in Techline Connect SPS2

The VXDIAG Nano for GM diagnostic tool is widely used for GM vehicles. However, users may occasionally encounter issues, such as crashes or unrecognized devices, when using it with Techline Connect SPS2. This guide provides practical solutions to troubleshoot and resolve these problems efficiently.

Common Issues

Here are the common problems users face with the VCX Nano GM in Techline Connect SPS2:

• Techline Connect crashes after selecting the VXDIAG Nano device.
• The MDI or MDI 2 device type fails to recognize the VCX Nano device.
• Errors occur during module selection, such as while programming radios for GM vehicles.

Initial Checks

Before diving into solutions, ensure the following:

• The VXDIAG device is properly connected to the vehicle and recognized by VX Manager.
• Firmware and licenses in VX Manager are up-to-date. If voltage is not displayed, the device is not communicating with the vehicle.
• Avoid using Windows 10 Home edition. Opt for Windows 10 Pro 64-bit for compatibility.

Step-by-Step Solutions

Solution 1: Proper Installation on a Single Computer

1. Uninstall the following programs: Techline Connect, GDS2, Tech2Win, MDI drivers, and any related files.
2. Reinstall in this order:
   • First, install Techline Connect and enable Passthru mode.
   • Then, install GDS2 or Tech2Win if diagnostic functions are needed.

Solution 2: Use Two Separate Computers

If you have access to a second computer, optimize the setup as follows:

• Use the first computer for GDS2/Tech2Win diagnostics.
• Use the second computer for Techline Connect and VX Manager with only Passthru drivers installed.

Solution 3: Reinstall Techline Connect

1. Load the Passthru driver in VX Manager.
2. Connect the VXDIAG Nano via Passthru mode.
3. Launch Techline Connect through the ACDelco SP2 shortcut link.

Additional Tips

• Keep diagnostic tools like GDS2 on a separate system to avoid software conflicts.
• Ensure all software is updated to the latest version for optimal performance.
• Check system requirements for SPS2 before installation.

User Insights

Here are some tips shared by other users:

• Use Techline Connect exclusively for programming tasks with Passthru mode enabled.
• Avoid using outdated GDS2 versions alongside Techline Connect to prevent compatibility issues.
• Many users resolved problems by performing a clean installation and ensuring all conflicts were eliminated.

For more troubleshooting resources, visit the official VXDIAG website.