Component Description

WARNING: This page is about a different car, the 2004 Infiniti I35. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Intake Air Temperature Sensor

Courtesy of NISSAN MOTOR CO., U.S.A.

The intake air temperature sensor is mounted to the air duct housing. 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. See Figure and Figure .

Reference data

Fig 2: Displaying IAT Sensor Reference Data

Courtesy of NISSAN MOTOR CO., U.S.A.

CAUTION: Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.