iSmartDiag is a Car Diagnostic Tool. Its main functions include Bluetooth, vehicle data download, data management, diagnosis and maintenance. First, the user needs to download the vehicle in Application ->Update, and then return to the home page to select the diagnostic function. After selecting the vehicle, if the VCI is not connected, the user will be prompted whether to enter the VCI settings. The user can enter the vehicle diagnosis program only after successfully connecting to our hardware VCI Bluetooth box.