Component Description

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

The intake air temperature sensor is built-into the mass air flow sensor (1). 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 rise in temperature.

Fig 1: Identifying Mass Air Flow Sensor

Courtesy of NISSAN NORTH AMERICA, INC.

< Reference data>

Intake air temperature °C (°F)

Voltage⁽¹⁾ V

Resistance kΩ

25 (77)

3.3

1.800 - 2.200

80 (176)

1.2

0.283 - 0.359

⁽¹⁾	This data is reference value and is measured between ECM terminal 34 (Intake air temperature sensor) and ground.

Fig 2: Fuel Tank Temperature Sensor Resistance Graph

Courtesy of NISSAN NORTH AMERICA, INC.

CAUTION: Never 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.