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Home >> Nissan-Datsun >> 2004 >> Pathfinder SE, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System >> DTC P0127: IAT Sensor >> Component Description
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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.

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 Intake Air Temperature Sensor
G00336353Courtesy of NISSAN MOTOR CO., U.S.A.

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Fig 2: Intake Air Temperature Sensor Voltage And Resistance Chart
G00336354Courtesy 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.
Fig 3: Identifying Intake Air Temperature Sensor Resistance Graph
G00336355Courtesy of NISSAN MOTOR CO., U.S.A.
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