top of page

How To Guide:

Source: LAUNCH TECH CO LTD

LAUNCH Operation Instructions for the function of UDS Engine Replacement of Volkswagen Audi

Just a Heads-Up: This guide is here to help you out, but it’s for general info only. We try to keep everything accurate and reliable, but we can’t promise it’s perfect. So, if you decide to follow this guide, you’re doing it at your own risk.  We’re not responsible for any loss or damage that might happen, including indirect or consequential loss, or any loss of data or profits from using this guide.  Sometimes, we might link to other websites. We don’t control those sites, so we can’t vouch for their content. Just because we link to them doesn’t mean we endorse them.  We do our best to keep this guide running smoothly, but we can’t be held responsible if it’s temporarily unavailable due to technical issues beyond our control.

Operation Instructions for the function of UDS Engine Replacement of Volkswagen Audi


Function Description:

Perform this function when Engine Replacement is required (Engine ME17.5.22 is used in this case).


Supported products:

Launch X431PADIII, PADV, PRO Anti-theft matching tool and other diagnostic devices + GIII programmer.


Operation guide:

1. Select 【Special Function 】-> 【Anti-Theft Function 】, read the disclaimer carefully, click "OK", and select 【Generation 4 And Above Immobilizer System】, (as shown in the figure below);

2. Select 【Engine Module Replacement】 (as shown in the figure below);

3. Select 【Platform Mode】 (as shown in the figure below);

4. Connect the diagnostic connector and the Immobilizer programmer according to the information shown in the figure, and click "OK" (as shown in the figure below);

5. Select 【ME17.5.22 TC1724】 (as shown in the figure below);

6. Select 【View Wiring Diagram】(as shown in the figure below);

7. Connect the original engine and the Immobilizer programmer according to the wiring diagram, and click "OK", (as shown in the figure below);

8. Select 【Read Chip ID】, (as shown in the figure below);

9. If the engine is successfully connected to the Immobilizer programmer, the chip ID will be displayed, click "OK", (as shown in the figure below);

10. Select 【Backup EEPROM Data】 to read the EEPROM data of engine, (as shown in the figure below);

11. Enter the file name, click "OK", you can also choose the save path, click "OK", (as shown in the figure below);

12. Select 【Back Up FLASH Data】, the current read/write data volume of FLASH is large. To improve communication stability, please use the USB for connection, click "OK" (as shown in the figure below);

13. Back up FLASH data, enter the file name and save the data (as shown in the figure below);

14. Select 【Flash&Eeprom Data Decryption】 (as shown in the figure below);

15. Respectively select 【Load FLASH Data】 and 【Load EEPROM Data】 to load the backed up EEPROM data and FLASH data (as shown in the figure below);

16. Select “Decode”, (as shown in the figure below);

17. Click "Yes" to save the decrypted data (as shown in the figure below);

18. After saving the decrypted data of original engine, you can view the relevant data of engine, click "OK" (as shown in the figure below), connect the external engine and the Immobilizer programmer, and follow step 6-13 to back up the EEPROM&FLASH data of external engine;

19. Click the Return button after the external engine ECU installed, go back to the submenu of engine replacement module and select 【Vehicle Mode】 (as shown in the

figure below);

20. Select 【4th Generation Immobilizer】 (as shown in the figure below);

21. The CS code decrypted by the engine is 16 bytes, click "No", (as shown in the figure below);

22. Select 【Step 1: Obtain Anti-theft Data of External Engine (Not Executed) 】 (as shown in the figure below);

23. Load the decrypted data, select 【Step 2: Obtain Anti-theft Data of Original Engine (Not Executed)】 (as shown in the figure below);

24. Select 【Obtained From Dump Data】(as shown in the figure below);

25. Respectively load the original EEPROM and FLASH data to be backed up, and select 【Decryption】 (as shown in the figure below);

26. Select 【Step 3: Replace Anti-theft Data】 (as shown in the figure below);

27. Confirm that the external engine has been installed on the vehicle, click "OK" (as shown in the figure below);

28. Please insert the key or place the key near the key sensing area, turn on the ignition switch to illuminate the instrument, and click "OK" (as shown in the figure below);

29. Input the PIN of the target vehicle (as shown in the figure below);


bottom of page