On-Vehicle Inspection: Notes

WARNING: This page is about a different car, the 2004 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT REFRIGERANT VOLUME
1. Check the sight glass of the cooler unit refrigerant liquid pipe E.
  1. Set the vehicle according to the conditions below.
    
    Fig 1: Conditions Reference Chart For Testing Sight Glass
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  2. Check the sight glass under these conditions.
Fig 2: Checking Sight Glass Of Cooler Unit Refrigerant Liquid Pipe E
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Fig 3: Sight Glass Symptom Chart
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INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET
1. This is a method in which the trouble is located by using a manifold gauge set. Read the manifold gauge pressure when these conditions are established.
  Test conditions:
  - Temperature at the air inlet with the switch set at RECIRC is 30 to 35°C (86 to 95°F)
  - Blower speed control switch at "HI" position
  - Temperature control switch at "MAX COLD" position
  - A/C switch ON
  - Fully open doors
  1. The refrigeration system functions normally
    Gauge reading:
    1. Low pressure side: 0.15 to 0.25 MPa (1.5 to 2.5 kgf/cm ² )
    2. High pressure side: 1.37 to 1.57 MPa (14 to 16 kgf/cm ² )
    Fig 5: Correct Pressure Display
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  2. Moisture present in refrigeration system
    
    Fig 6: Checking Insufficient Cooling
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  3. Insufficient cooling
    
    Fig 7: Identifying Poor Circulation
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    Fig 8: Poor Circulation Chart
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  4. Poor circulation of refrigerant
    
    Fig 9: Identifying Poor Circulating Coolant
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    Fig 10: Poor Circulation Chart
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  5. Refrigerant does not circulate
    
    Fig 11: Identifying Uncirculating Current
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    Fig 12: Uncirculating Coolant Chart
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  6. Refrigerant overcharged or insufficient cooling of condenser
    
    Fig 13: Identifying Overcharge/Insufficient Coolant
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    Fig 14: Overcharge/Insufficient Coolant Chart
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  7. Air present in refrigeration system
    
    Fig 15: Identifying Air Is Present In Cooling System
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    Fig 16: Air In Cooling System Chart
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  8. Expansion valve malfunction
    
    Fig 17: Identifying An Expansion Valve Malfunction
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    Fig 18: Expansion Valve Malfunction Chart
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  9. Defective compression compressor
    
    Fig 19: Identifying Defective Compression Compressor
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    Fig 20: Defective Compression Compressor Chart
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