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

INTAKE AIR TEMPERATURE SENSOR CHECK








1. Disconnect the volume air flow sensor connectors.
2. Measure resistance between terminals 5 and 6.

Standard value:
13 - 17 kohm @ -20 °C (-4 °F)
5.3 - 6.7 kohm @ 0 °C (32 °F)
2.3 - 3.0 kohm @ 20 °C (68 °F)
1.0 - 1.5 kohm @ 40 °C (104 °F)
0.56 - 0.76 kohm @ 60 °C (140 °F)
0.30 - 0.42 kohm @ 80 °C (176 °F)

3. If not within specifications, replace the volume air flow sensor.
4. Measure resistance while heating the sensor using a hair dryer.

Normal condition:

TEMPERATURE RESISTANCE (kohm)
Higher Smaller

5. If resistance does not decrease as heat increases, replace the volume air flow sensor assembly.