On-Vehicle Inspection

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

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET
1. This is a method in witch the trouble is located by using a manifold gauge set. Read the manifold gauge pressure when the these conditions are established.
  Test conditions:
  - Temperature at the air inlet with the switch set at RECIRC is 30 - 35°C (86 - 95°F)
  - Engine running at 1500 RPM
  - Blower speed control switch at "HI" position
  - Temperature control dial at "COOL" position
  - A/C switch ON
  - Fully open doors
  1. Normally functioning refrigeration system.
    Gauge reading:
    
    Low pressure side:
    
    0.15 - 0.25 MPa (1.5 - 2.5 kgf/cm ² )
    
    High pressure side:
    
    1.37 - 1.57 MPa (14-16 kgf/cm ² )
    
    Fig 1: Identifying Normally Functioning Refrigeration System
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Moisture present in refrigeration system.
    
    Fig 2: Identifying Moisture Present In Refrigeration System
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 3: Symptom Chart
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Insufficient cooling
    
    Fig 4: Identifying Insufficient Cooling
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 5: Symptom Chart
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Poor circulation of refrigerant
    
    Fig 6: Identifying Poor Circulation Of Refrigerant
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 7: Symptom Chart
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Refrigerant does not circulate
    
    Fig 8: Identifying Refrigerant Does Not Circulate
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 9: Symptom Chart
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Refrigerant overcharged or insufficient cooling of condenser
    
    Fig 10: Identifying Refrigerant Overcharged Or Insufficient Cooling Of Condenser
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 11: Symptom Chart
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. Air present in refrigeration system
    
    Fig 12: Air Present In Refrigeration System
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 13: Symptom Chart
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. Expansion valve improperly
    
    Fig 14: Identifying Expansion Valve Improperly
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 15: Symptom Chart
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. Defective compression compressor
    
    Fig 16: Identifying Defective Compression Compressor
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 17: Symptom Chart
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Gauge readings (Reference)

Fig 18: Gauge Readings Graph
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002