Just to be sure, I think you are saying that you measured the subject pin on the ECU with the connector removed and found it grounded, thus eliminating the wire to the coil as the culprit. If so, I would carefully inspect the ECU connector for any debris or bent pins, and then would be tempted to take the covers off, blow any dust or debris off, and measure one last time before ordering another ECU. A 30 day warranty will give you plenty of time to be sure the coil pin is fixed and check every other function you can think of to be sure the ECU is working. Good luck Ed.

RPG