Quote Originally Posted by Morbious View Post
Would all these readings be the same if the ECM wasn't working?
At this point, we can't talk to the ECM.

The OBD port power and grounds check are good, and the TIPM communicates with them.

The CAN bus circuit wiring appears to be intact.

We don't know if the TIPM is not communicating with the ECM or if the ECM is not communicating with the TIPM.

You will need a CAN Bus topology layout and an oscilloscope to perform a more in-depth diagnosis.

A higher-end scan tool would let you know if the TIPM communicates with any other modules; otherwise, I would suspect a bad TIPM.