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Evaporator Temperature Sensor Inspection

NOTE:
  • Inspect the evaporator temperature sensor when it is installed to the A/C unit.
  1. Set the fan speed MAX HI.
  2. Set the temperature control at MAX COLD.
  3. Set the RECIRCULATE mode.
  4. Turn the A/C switch off.
  5. Close all doors and windows.
  6. Wait for 5 min. 
  7. Disconnect the evaporator temperature sensor connector.
  8. Measure the temperature at the blower inlet.
  9. Measure the resistance between the evaporator temperature sensor terminals.
    • If the resistance is not as shown in the graph, replace the evaporator temperature sensor.
    Fig 1: Resistance Vs Temperature Graph
    G00975604Courtesy of MAZDA MOTORS CORP.
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