Air Temperature Sensor ( Ambient / Intake ): Testing and Inspection

INTAKE AIR TEMPERATURE SENSOR CHECK




1. Disconnect the mass airflow sensor connector.
2. Measure resistance between terminal No. 1 and No. 4.

Standard value:
13 - 17 kOhm [at -20°C (-4°F)]
5.3 - 6.7 kOhm [at 0°C (32°F)]
2.3 - 3.0 kOhm [at 20°C (68°F)]
1.0 - 1.5 kOhm [at 40°C (104°F)]
0.56 - 0.76 kOhm [at 60°C (140°F)]
0.30 - 0.45 kOhm [at 80°C (176°F)]




3. If not within specifications, replace the mass airflow sensor.




4. Measure resistance while heating the sensor using a hair dryer.
5. If resistance does not decrease as heat increases, replace the mass airflow sensor.