Intake Air Temperature Sensor

The intake air temperature sensor is built-into the mass air flow sensor. The sensor detects intake air temperature and transmits a signal to the ECM.

Fig 1: Identifying Mass Air Flow Sensor

Courtesy of NISSAN NORTH AMERICA, INC.

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 rise in temperature.

<Reference data> 

Fig 2: Resistance And Temperature Graph

Courtesy of NISSAN NORTH AMERICA, INC.

*: These data are reference values and are measured between ECM terminals 67 (Intake air temperature sensor) and 68 (Sensor ground).