2. Main Functions Provides quick access to check the engine failure details. Engine Inspection Live Data Provides quick access to read the data stream of the OBD. Displays battery real-time voltage and cranking voltage of the vehicle. Battery Test Configures the phone to operate as a Head-Up Display (HUD) tool. HUD Maintenance Provides 6 maintenance service functions. I/M Readiness Provides quick access to check the status of the emission-related systems. Performance Test Allows you to perform 0 to 100km acceleration tests on your vehicle. 3. Toolbar Selecting this icon returns you to the home screen. Home 13