CANBUS shield with OBD2

I connected the canbus shield V2 to the car through the OBD2 interface then to Arduino Uno.
try one of seeed’s examples in its library and give me no results, just say the connection is ok on the serial monitor.
can anyone help me? do I need a special code for using OBD2 instead of just that two wires?

What model of car are you testing? What is the communication speed of OBD-II’s CAN bus?

@Baozhu
the car is Toyota Camry 2008 and the speed is 500kb

oh please, I really need help, nothing works!!

The example code “receive_monitor” works for me, I receive a lot of messages from OBD2 port.
But I want to hook up the CANHacker SW to the serial data (USB Port) but I do not find any example that support my setup.