The intake air temperature sensor is built-into mass air flow sensor (1). The sensor detects intake air temperature and transmits a signal to the ECM.

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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>

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Intake air temperature
 [°C (°F)]
Voltage* (V)
Resistance (kΩ)
25 (77)
3.3
1.800 - 2.200
80 (176)
1.2
0.283 - 0.359
*: These data are reference values and are measured between ECM terminals 44 (Intake air temperature sensor) and 22 (Sensor ground).