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

INTAKE AIR TEMPERATURE SENSOR CHECK







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

Standard value:
13 - 17 kohms [at -20° C (-4° F)]
5.4 - 6.6 kohms [at 0° C (32° F)]
2.3 - 3.0 kohms [at 20° C (68° F)]
1.0 - 1.5 kohms [at 40° C (104° F)]
0.56 - 0.76 kohms [at 60° C (140° F)]
0.31 - 0.43 kohms [at 80° C (176° F)]







3. If not within specifications, replace the mass airflow sensor.
4. Measure the resistance while heating the sensor using a hair dryer.







5. If the resistance does not decrease as heat increases, replace the mass airflow sensor.