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Refrigerant System Performance Test

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • After servicing the refrigerant system, test its performance.
  1. Install the manifold gauge set. (See MANIFOLD GAUGE SET INSTALLATION .)
  2. Open the hood.
  3. Close all the doors and all the windows.
  4. Warm up the engine and run it at a constant 1,500 RPM. 
  5. Turn the A/C switch on.
  6. Set the fan switch at 4th.
  7. Set the REC/FRESH lever to REC.
  8. Set the mode dial to VENT.
  9. Set the temperature control dial to MAX COLD.
  10. Measure the center ventilator temperature and record the temperature reading.
  11. Measure the ambient temperature and record the temperature reading.
  12. Verify that the temperature reading is in the shaded zone (maximum 6°C {43°F})  .
    • If the performance is not within the shaded zone, troubleshoot the refrigerant system. (See FOREWORD .)
      Fig 1: Refrigerant System Performance Test Graph
      G03638526Courtesy of MAZDA MOTORS CORP.
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