The tool(aka scope) you have is not intended for this kind of job.
What you need is an OBD2 "protocol analyzer" with the correct hardware interface.
The protocol is bidirectional:
i.e the "reader"(you) tells the "car" what you want it to do for you by sending a "command" to which the "car" will respond to.
There are 5 types of ODB2 protocols/interfaces possible.
First thing to do is to identify the one your Toyota Camry has. Look here for how to.
Then you need to implement the protocol of that specific interface to communicate with your car.
An example can be found here .
Only then you can hook up the scope and try to "read" what the car's response is.