Component Description

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.

Fig 1: Identifying IAT Sensor

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

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.

< Reference data >

Fig 2: Voltage Chart

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

Fig 3: Resistance Vs Temperature Chart

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.