retrieving codes from OBD2 with oscilloscope

[bigone5500]

I have the DS2072A scope and want to know if I can use it to get codes from my '99 camry.

 

[dorke]

Theoreticaly you can.
Would you try to chop down a tree with a kitchen knife...
Get the right tool for the job!
Buy an obd2 scanner, they are dirt cheap.

 

[bigone5500]

That's logical...

However. I have a tool that I would like to see if it can do these things. So I would like to find out how. Maybe it's a bit over my head but a challenge is good once in a while.

Theoretically you say?? So really it's not supposed to be possible???

 

[dorke]

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.

Still think it is worth the effort ?

 

[bigone5500]

Like I said...Probably over my head. I have access to scanners but wanted to see if I could use my scope.

Thanks anyway.