Air Temperature Sensor ( Ambient / Intake ): Description and Operation

Intake Air Temperature Sensor (DTC: 0401)
The intake air temperature sensor is mounted to the air duct (behind front turn signal lamp RH). The sensor detects intake air temperature and transmits a signal to the ECM.
The temperature sensing unit uses a thermistor, which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise.
This sensor is not used to control the engine system. It is used only for the on board diagnosis.