TDU Cannot Connect to AGC – Guide

Problem

If your TDU cannot connect to the AGC, it is often due to an outdated software version.

Example below:

TDU units with software below version 1.4.3.0 may have communication issues with newer AGC units. Therefore, updating the software is recommended.

Check Software Version

Go to:
Home → Main Menu → Setup → About

Here you can find the firmware version.

Update via USB

Preparation

You will need:

• A USB drive (must be formatted as FAT32)
• A computer
• The latest software from DEIF

Download Software

1. Go to: Software – Get the latest version for full functionality
2. Select the software that matches your TDU model
3. Follow the instructions in the DEIF email
4. The file will be downloaded as a .zip file

Important: Do not unzip the file

Copy to USB

1. Insert the USB drive into your computer
2. Copy the .zip file directly to the USB drive
3. Safely remove the USB drive

Install on TDU

1. Insert the USB drive into the TDU
2. The TDU will automatically detect the update
3. Press Confirm
4. Press Confirm again to restart

After Restart

1. Select Startup sequence
2. Press Install
3. Navigate to:
   • Mnt
   • usbmemory
4. Select the update file and press OK

During Installation

Wait until the Continue button appears

Finish

1. Press Continue
2. The TDU will restart
3. Close the update window if it appears again
4. Remove the USB drive

Result

The TDU is now updated and ready to use. The connection to the AGC should now work.