Component Description

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

The intake air temperature sensor is built-into mass air flow sensor.

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.

Fig 1: Identifying Mass Air Flow Sensor

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

< Reference Data >

Fig 2: Reference Data

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

Fig 3: Identifying Acceptable Resistance And 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.