Well I just bought a wrx and the previous owner hacked the hell out of the ecm harnes (no idea what for) and gauge cluster to hide the cel. I'm not impressed. I've done all that the diag work and I'm left with replacing the ecm as I have no reading on the front af sensor with ssm3. No voltage, no amperage, no correction etc. No resistance on ecm harnes terminal b84 wires 4, 5, heater circuit power and no resistance on ground side b84 terminal wires 8 and 9. I have battery voltage at the af sensor (new sensor btw) and no voltage drop when the sensor is hot. I'm stumped and all I have left to try is an ecm according to subaru diag charts. Any help would be great, thanks!
