AIR CONDITIONING PRESSURE SENSOR > INSTALLATION

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1. Sufficiently apply compressor oil to O-ring and the fitting surface of the pressure sensor.
   

   Compressor oil:

   ND-OIL 8 or equivalent
   

2. Using a deep socket wrench 27 mm, install the pressure sensor.
   

   Torque:

   11 N*m{ 110 kgf*cm , 8 ft.*lbf }

3. Connect the connector.
   

HINT:

Charge refrigerant in accordance with the equipment manual.

1. Perform vacuum purging using a vacuum pump.
   

2. Charge refrigerant HFC-134a (R134a).
   

   SST

   09985-20010   (09985-02010, 09985-02050, 09985-02060, 09985-02070, 09985-02080, 09985-02090, 09985-02110, 09985-02130, 09985-02140, 09985-02150)
   

   Standard:

   330 to 390 g (11.6 to 13.8 oz.)
   

   NOTICE:

   1. Do not start the engine before charging it with refrigerant as the cooler compressor does not work properly without sufficient refrigerant. This could cause the compressor to overheat.
      
   2. Approximately 100 g (3.5 oz.) of refrigerant may need to be charged after bubbles disappear.
      The volume of refrigerant should be measured, not checked with the sight glass.
      

   HINT:

   
   
   1. The relationship between the refrigerant charge amount and the pressure is as follows.
      
      
      
      
      
      
   2. High Charge Range:
      If the refrigerant is overcharged, the pressure rises on the high-pressure side. High-pressure cut off frequently occurs. This causes insufficient cooling performance and also insufficient compressor lubrication.
      
   3. Low Charge Range:
      A shortage of refrigerant causes insufficient cooling performance and low circulation of refrigerant oil, which shortens the compressor life. Operation with insufficient coolant raises the refrigerant temperature and causes heat deterioration of the rubber seals and hoses. Cracking and subsequent refrigerant leakage may occur.
      
   
   

   1. Install the caps onto the service valves on the refrigerant line.
      

NOTICE:

Warm up the engine at less than 2000 rpm for 1 minute or more after charging it with refrigerant.

1. After recharging the refrigerant gas, check for refrigerant gas leakage using a halogen leak detector.
   

2. Perform the operation as follows:
   

   1. Stop the engine.
      
   2. Secure good ventilation (the halogen leak detector may react to volatile gases other than refrigerant, such as evaporated gasoline or exhaust gas).
      
   3. Repeat the test 2 or 3 times.
      
   4. Make sure that some refrigerant remains in the refrigeration system.
      When the compressor is off: approximately 392 to 588 kPa (4 to 6 kgf/cm², 57 to 85 psi)
      

   HINT:

   It is impossible for the above pressure to be maintained if there is leakage.

3. Using the halogen leak detector, check the refrigerant line, especially at the connection points, for leakage.
   

4. Bring the halogen leak detector close to the drain hose before performing the test.
   

   Text in illustration 

   *1	Drain hose
   *2	Halogen leak detector

   HINT:

   1. After the blower motor has stopped, leave the cooling unit for at least 15 minutes.
      
   2. Place the halogen leak detector sensor under the drain hose.
      
   3. When bringing the halogen leak detector close to the drain hose, make sure that the halogen leak detector does not react to other volatile gases.
      
   If such a reaction is unavoidable, the vehicle must be lifted up.
   

5. If no gas leakage is detected from the drain hose, remove the blower motor from the cooling unit. Insert the halogen leak detector sensor into the unit and perform the test.
   

6. Disconnect the pressure switch connector and leave it for approximately 20 minutes. Bring the halogen leak detector close to the pressure switch and perform the test.