Launch X431 released the new ECU/TCU Cloning Software V10.40 on Jan.13, 2025. It adds Mercedes-Benz fourth generation 7-speed transmission TCU VGS4-0-NAG2, VGS4-500-NAG2 read, write, personalization, and clearing function via Boot, etc, and applies to X431 ECU & TCU Programmer, X431 X-prog3 with PC Adapter, and Launch X431 diagnostic scanner with SmartLink C and X-prog3 (support USB connection).

V10.40

1.Added read and write, personalization, clearing function for BOOT mode Benz transmission TCU VGS4-0-NAG2, VGS4-500-NAG2.

2.Added BENCH mode Cadillac, Chevrolet transmission ECU T87A read and write function.

3.Added read and write function for BENCH mode Great Wall transmission ECU 7DCT450.

4.Added read and write function for BENCH mode Great Wall, Geely engine ECU MG1US008/MG1UA008.

5.Optimized BMW E83 data read issue.

6.Optimize the expired device usage status so that when the device is expired, the functions released before the expiration can still be used.

New updates are restricted to download when the free subscription has expired.

Here mainly shows how to replace and personalize Benz VGS4-0-NAG2 TCU by Launch X431 ECU Programmer.

Step-by-Step Guide:

1. Select the ECU Model

Enter the appropriate ECU model in the system, such as "VGS4."

2. Access the Direct Connection Wiring Diagram

Click to open the wiring diagram for proper connections.

3. Follow the Prompts

Follow the on-screen instructions and click "OK" to proceed.

4. Connect Device and Benz TCU

The wiring diagram offers two modes: BENCH and BOOT.

Use BENCH mode to read data from the original car's gearbox computer.

For wiping and personalization of an external second-hand gearbox computer, connect both BENCH and BOOT modes simultaneously.

5. Read TCU Information

After completing the connections, click "Read TCU Information" to retrieve details.

6. Read EEPROM Data

Click "Read EEPROM Data (BENCH)."

If BENCH mode fails, switch to BOOT mode and retry.

7. Replace and Erase Data

After successfully reading the original ECU data, connect the external ECU computer to the X431 ECU & TCU Programmer.

Ensure both BENCH and BOOT modes are connected simultaneously.

Click "Erase" to clear the external ECU data.

8. Perform Personalization

Click "Personalization" and select the original car's EEPROM data to write.

Click "OK" once the personalization process is complete.

9. Verify the Erasure

Click "Read TCU Information" again to confirm that the ECU data has been successfully erased.

10. Install and Program

Reinstall the ECU into the vehicle and complete the necessary programming and coding process.

This guide ensures a seamless ECU/TCU replacement and personalization workflow using the Launch X431 ECU & TCU Programmer.

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