How to use Kess3 and ECM to reset the transmission control module?

1. Prepare the Tools and Vehicle

• Kess3 Device: Ensure it is connected to your computer and has an active software subscription 14.
• ECM Titanium Software: Installed on your computer and linked to your Alientech account 19.
• Vehicle Setup: Park the vehicle on a flat surface, turn off the engine, and disconnect the negative battery terminal for 10 seconds (to clear residual power) 26. Reconnect the battery afterward.

2. Connect Kess3 to the Vehicle

• OBD Connection: Plug the Kess3 OBD cable into the vehicle’s OBD port (usually located under the dashboard).
• Power On: Turn the ignition to the ON position (do not start the engine).

3. Diagnose and Clear DTCs with Kess3

1. Launch Alientech Suite: Open the software associated with Kess3.
2. Select Vehicle: Navigate to the Vehicle Selection menu and choose the make, model, and TCM type (e.g., BMW 5 Series F10 8AT) 14.
3. Access DTC Menu:
   
   • Click Extra > DTC to view diagnostic trouble codes.
   • Confirm whether to view the manual, then proceed to View/Delete DTCs 14.
4. Diagnose and Clear Codes:
   
   • Follow the prompts to turn the ignition on, check connections, and start diagnostics.
   • After retrieving DTCs, click Erase to clear them. Turn off the ignition when prompted 14.

4. Adjust TCM Parameters with ECM Titanium

1. Read TCM File:
   • In ECM Titanium, click File > Read to extract the TCM calibration file from the vehicle using Kess3 1920.
   • Save the file to your computer for backup.
2. Reset TCM Settings:
   • Open the saved TCM file in ECM Titanium.
   • Navigate to Transmission Control Unit (TCU) settings. Depending on the vehicle, this may include:
     
     • Adaptive Values: Clear learned shift patterns by resetting adaptation tables.
     • Factory Defaults: Restore original TCM parameters (e.g., shift timing, torque limits) 511.
   • Modify parameters as needed (e.g., reducing shift times or adjusting RPM thresholds) 419.
3. Write New Settings:
   • Click File > Write to send the modified TCM file back to the vehicle via Kess3.
   • Ensure the ignition remains on during the write process to avoid power interruptions 1419.

5. Verify and Test

1. Reconnect Battery: If disconnected earlier, reconnect the negative battery terminal.
2. Start the Vehicle: Let the engine idle for 5–10 minutes to allow the TCM to relearn baseline settings 221.
3. Road Test: Drive the vehicle to verify smooth shifting and absence of warning lights. The TCM will adapt to your driving style over time 511.

Important Notes

• Vehicle Compatibility: Kess3 and ECM Titanium support a wide range of vehicles, but procedures may vary (e.g., VAG Group DQ200 transmissions require specific protocols) 414.
• Safety Precautions:
  
  • Ensure the vehicle battery is fully charged to prevent data corruption during writes 4.
  • Avoid interrupting the write process, as this could brick the TCM 9.
• Technical Support: For complex issues or rare vehicle models, contact Alientech’s official support or an authorized dealer 12.