DTC P0112: Intake Air Temperature Circuit Low Input: Operation
About 5 volts are applied to the IAT sensor output terminal (terminal No. 6) from the ECM (terminal No. 72) or PCM (terminal No. 64) via the resistor in the ECM or PCM. The ground terminal (terminal No. 5) is grounded with ECM (terminal No. 40) or PCM (terminal No. 16). The IAT sensor is a negative temperature coefficient type of resistor. When the intake air temperature rises, resistance decreases. The intake air temperature sensor output voltage increases when resistance increases and decreases when resistance decreases.