4.2.2 EOBD & OBD-II The EOBD & OBD-II function allows you to perform emission-related diagnostics for your vehicle. To perform OBD-II Diagnostics: 1. Go to Diagnostics > All > EOBD. Figure 4-7 2. Select your communication method: Auto Scan or Protocol. Auto Scan - the UltraDiag will automatically communicate with the vehicle and identify which protocol the vehicle is using. Protocol - allows you to manually select the communication protocol. After the communication protocol is confirmed, a vehicle status screen displays showing the protocol and other status info of your vehicle. 25