DTC P0111: Intake Air Temperature Circuit Malfunction: Operation
About 5 volts are applied to the IAT sensor output terminal (terminal No. 6) from the ECM (terminal No. 72 - M/T) or PCM (terminal No. 64 - A/T) via the resistor in the ECM (M/T) or PCM (A/T). The ground terminal (terminal No. 5) is grounded with ECM (terminal No. 40 - M/T) or PCM (terminal No. 16 - A/T). The intake air temperature sensor is a negative temperature coefficient type of resistor. When intake air temperature rises, resistance decreases. The intake air temperature sensor output voltage increases when resistance increases and decreases when resistance decreases.