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mcusys wrote:Is it possible that we can modify J2534 library work for mitsubishi M.U.T. III Software because only work MUT VCI interface....But there are those who create VCI_Bridge for Connect PassThru device after open M.U.T Software but very expensive cost.

I've seen a program like this that can PassThru device and M.U.T III software without MUT Interface.

What is your opinion?

Here is video link

https://www.youtube.com/watch?v=FWSFBWE5lXE&t=37s

The VCI_Bridge is just simulating the MUT VCI interface. The official interface likely reports back a specific value/serial/values that the MUT software recognizes and makes it believe it is a valid interface.
Creating the bridge requires creating the J2534 API for the MUT software to communicate to, and then also creating the J2534 connection to the desired scantool.

First thing that should be done is monitoring what is sent/received from the MUT interface on initial connection since that will be the critical information needed for creating the bridge.