I have Toyota Probox 2006 Model and 4 different types of OBD devices too, Bluetooth, wifi and usb.. and tried almost all the android apps to connect with my car ecu, but in vain.... my conclusion is that The Japanese models of Toyota does not support the obd devices like ELM327 and others. Also tried some other tactics with no result.... But the models of Toyota and Honda available in Pakistan are connected very easily... I have tried on Honda City 2006, Toyotal XLI and GLI.... so no issue in these models, If any one gets success in connecting with Japanese models ECU, then share with us..