I've got a P1105 map/baro solenoid code on my 2000 Frontier. Tested the solenoid, it's good. Tested the sensor, got power ground and the 5volt reference. Vacuum hoses are properly routed. Only thing I can't figure is that when I apply throttle, the 5 volt reference signal doesn't change. I assume it would right? But if not, where do I go next? Test at the ECU? Anybody happen to know what pin on the ECU I would test for the Map sensor? Thanks in advance.