Air Temperature Sensor ( Ambient / Intake ): Testing and Inspection
PROCEDURE1. Inspect the intake air temperature (IAT) sensor resistance using an ohmmeter.
- Disconnect the IAT sensor connector.
- Measure the resistance between the terminals.
Temperature Resistance
-20°C (-4°F): 10 - 20 k Ohms
0°C (32°F): 4.0 - 7.0 k Ohms
20°C (68°F): 2.0 - 3.0 k Ohms
40°C (104°F): 0.9 - 1.3 k Ohms
60°C (140°F): 0.4 - 0.7 k Ohms
- If the resistance is not as specified, replace the IAT sensor.
For information on testing the IAT sensor circuit refer to "DTC 24" under the "Trouble Code Charts".
Testing and Inspection