I don't know either you'll need a good wiring diagram and patience. I was just adding my experience from problems on other vehicles, as it sounds like you have exhausted most of the other possibilities. study the diagrams and make a checklist of voltages and resistances to test and go through them methodically highlighting any discrepancies. to look for bad joints and connections I prefer doing a volt drop test with the item under load. to check for a bad ground set your meter to voltage, put the negative lead of your meter to battery negative possibly extend it a bit and backprobe the ground pins at the module and sensors with the meter set to dc volts and the engine running, the voltage should be less that 0.01 volts or there is resistance in the ground which can give a floating reference.