Hello, I have 2014 cx-9 grand touring which has a charging system problem. Replaced battery and alternator (alt 2times) battery light started coming on and off intermittently and charging rate steadily decreased from 13.8 to not charging at all now. I kept oem alternator and replaced regulator and rectifier in it and reinstalled it, still no charge. All voltages are correct on plug and stud. Probed wires back to pcm all ok. I’m thinking either pcm failed ( car runs great) or another sensor is interrupting charging circuit, I’ve read Mazda has iat sensor in that circuit but don’t show it on diagram. Any help greatly appreciated wife needs her car back!