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Evaporator Temperature Sensor Inspection

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • Inspect the evaporator temperature sensor when it is installed to the A/C unit.
  1. Set the fan switch to 4th speed.
  2. Set the temperature control to MAX COLD.
  3. Set the air intake mode to RECIRCULATE.
  4. Turn the A/C switch off.
  5. Close all of the doors and roll up all the windows.
  6. Wait for 5 min. 
  7. Disconnect the evaporator temperature sensor connector.
  8. Measure the temperature at the air intake.
  9. Measure the resistance between evaporator temperature sensor terminals.
    • If the characteristics of the evaporator temperature sensor are not as shown in the graph, replace the evaporator temperature sensor.
    Fig 1: Evaporator Temperature Sensor Graph
    G03702816Courtesy of MAZDA MOTORS CORP.
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