2.3K ohms to ground on your harness is not okay. You should have at least a Meg ohm. It’s not he CLC (or at least not just the CLC) if you can’t talk to the door or selector with the CLC disconnected. To eliminate the harness from the equation you can plug directly into the selector and the door with their comm (in) disconnected to see if you can talk to those boards individually. If you can’t talk to anything, you may want to make sure your service tool works on another car as Jluff suggested.