Air Conditioning System: Charging

Install charging cylinder.
NOTE: When handling the charging cylinder, always follow the directions given in the instruction manual.
1. Charge the proper amount of refrigerant into the charging cylinder.
2. Connect the center hose to the charging cylinder.
  CAUTION: Do not open both high and low hand valves of manifold gauge set.
3. Open the valve of charging cylinder.
4. Press the valve core on the side of manifold gauge and expel the air inside of the center hose.
  
  Fig 1: Identifying Components For Charging Refrigerant
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Inspect refrigeration system for leaks.
1. Open the high pressure hand valve and charge refrigerant.
2. When the low pressure gauge indicates 98 kPa (1 kgf/cm² , 14 psi) close the high pressure hand valve.
3. Using a gas leak detector, check the system for leakage. If leak is found, repair the faulty component or connection.
  
  Fig 2: Identifying Gas Leak Detector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NOTE: Use the refrigerant recovery/recycling machine to recover the refrigerant whenever replacing parts.
Charge refrigerant into refrigerant system.
1. If there is no lead after refrigerant lead check, charge the proper amount of refrigerant into refrigeration system.
  CAUTION:
  - Never run the engine when charging the system through the high pressure side.
  - Do not open the low pressure hand a valve when the system is being charged with liquid refrigerant.
1. Open the high pressure hand valve fully.
2. Charge specified amount of refrigerant, then close the high pressure hand valve.
  
  Fig 3: Identifying High & Low Pressure Service Valves
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NOTE: A fully charged system is indicated by the sight glass being free of bubbles.
3. Charge partially refrigeration system with refrigerant.
  1) Set vehicle in these conditions:
  - Running engine at 1500 RPM.
  - Front A/C:
    1. Blower speed control switch at "HI" position.
    2. Rear blower switch at "HI" position.
  - Dual A/C: A/C switch ON
  - Front A/C: Temperature control switch at "MAX. COOL" position.
  - Dual A/C:
    1. Rear temperature control switch at "MAX. COOL" position.
  - Fully open the doors.
  - Air inlet control set at "RECIRC".
  2) Open the low pressure hand valve.
  
  CAUTION: Do not open the high pressure hand valve.
4. Charge refrigerant until bubbles disappear and check the pressure on the gauge through the sight glass.
  
  Fig 4: Identifying Properly Charged Refrigerant
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002