3. Plug the TOPDON ArtiDiag800 BT Diagnostic VCI dongle into the vehicle’s DLC socket. 4. Turn the ignition on. The engine can be off or running. 5. Hold the Power Button for 3 seconds to turn the TOPDON ArtiDiag800 BT on. The tablet will start initializing and enter the following interface. *Note: Don’t connect or disconnect any test equipment with the ignition on or engine running. Select the tool language in the following interface: 6. Language Setting 10