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Air Temperature Sensor Test

  1. Disconnect battery terminals and air temperature sensor connector. Connect an ohmmeter between sensor terminals. Ohmmeter reading should vary with temperature. See AIR TEMPERATURE SENSOR RESISTANCE  table.
  2. Check resistance between sensor body and each of the terminals. Resistance should be high or infinite. Replace sensor, if sensor does not test okay.
AIR TEMPERATURE SENSOR RESISTANCE

Temperature: °F (°C) Ohms
14 (-10) 960
32 (0) 640
50 (10) 435
68 (20) 300
86 (30) 210
104 (40) 150
122 (50) 108
140 (60) 80