On-Vehicle Inspection

WARNING: This page is about a different car, the 2002 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT REFRIGERANT VOLUME
1. Observe the sight glass on the cooler refrigerant liquid pipe A.
  
  Fig 1: Locating Sight Glass
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Test conditions:
  - Running engine at 1,500 rpm
  - Blower speed control switch at "HI"
  - A/C switch ON
  - Temperature control dial at "MAX. COOL"
  - Fully open the doors
Fig 2: Symptom/Remedy Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 1,500 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:
    1. Low pressure side: 0.15 - 0.25 MPa (1.5 - 2.5 kgf/cm ² )
    2. High pressure side: 1.37 - 1.57 MPa (14 - 16 kgf/cm ² )
    Fig 3: Gauge Readings For Normally Functioning Refrigeration System
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Moisture present in refrigeration system.
    
    Fig 4: Gauge Readings For Moisture Present In Refrigeration System
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 5: Symptom/Remedy Table
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Insufficient cooling
    
    Fig 6: Gauge Readings For Insufficient Cooling
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 7: Symptom/Remedy Table
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Poor circulation of refrigerant
    
    Fig 8: Gauge Readings For Poor Circulation Of Refrigerant
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 9: Symptom/Remedy Table
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Refrigerant does not circulate
    
    Fig 10: Gauge Readings For Refrigerant Does Not Circulate
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 11: Symptom/Remedy Table
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Refrigerant overcharged or insufficient cooling of condenser
    
    Fig 12: Gauge Readings For Refrigerant Overcharged Or Insufficient Cooling Of Condenser
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 13: Symptom/Remedy Table
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. Air present in refrigeration system
    
    Fig 14: Gauge Readings For Air Present In Refrigeration System
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 15: Symptom/Remedy Table
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. Expansion valve improperly
    
    Fig 16: Gauge Readings For Expansion Valve Functioning Improperly
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 17: Symptom/Remedy Table
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. Defective compression compressor
    
    Fig 18: Gauge Readings For Defective Compression Compressor
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 19: Symptom/Remedy Table
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Gauge readings (Reference)

Fig 20: Gauge Readings (Reference) Graph
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002