Does anyone have a run down of how to check your ECU ground connections I have ohmed connector C0634 to pins 4, 5, and 6 with battery negative off and they are good but didn’t get anything from the other various connectors grounds. Can I ohm check with ecu disconnected and battery connected?

 

What issue are you working on? Checking for resistance/continuity is usually done with the circuit not connected to power.

Side note do you have the RAVE electrical circuit diagram? Super handy with all the connectors/pins labeled.