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 PCM (terminal No. 64) via the resistor in the PCM. The ground terminal (terminal No. 5) is grounded with PCM (terminal No. 16). The IAT sensor is a negative temperature coefficient type of resistor. When the intake air temperature rises, the resistance decreases. The IAT sensor output voltage increases when the resistance increases and decreases when the resistance decreases. See Figure .