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Refrigerant System Performance Test

WARNING: This page is about a different car, the 2004 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform refrigerant pressure check. See REFRIGERANT PRESSURE CHECK .
    • If not as specified, troubleshoot refrigerant system. See TROUBLESHOOTING INDEX .
    • If they are correct, go to next step.
  2. Place a dry-bulb thermometer in the driver-side center ventilator outlet.
  3. Open the hood.
  4. Warm up the engine and run it at a constant 1,500 rpm. 
  5. Set the fan switch to 4th speed.
  6. Turn the A/C switch on.
  7. Set the RECIRCULATE mode.
  8. Set the temperature control to MAX COLD.
  9. Set the VENT mode.
  10. Close all the doors and all the windows.
  11. Wait until the center ventilator temperature stabilizes. The output temperature is stable when the A/C compressor is repeatedly turned on and off based on the A/C compressor control of evaporator temperature sensor.
  12. Measure the center ventilator temperature.
  13. Measure the ambient temperature.
  14. Verify that the intersection of the center ventilator temperature and the ambient temperature is in the shaded zone.
    • If not as specified, troubleshoot the refrigerant system. See TROUBLESHOOTING INDEX .
      Fig 1: Center Ventilator Temperature Vs. Ambient Temperature Graph
      G01022196Courtesy of MAZDA MOTORS CORP.
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