Toyota Highlander Hybrid 6 2005-06

Leak Testing

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Perform the leak testing procedure under the following conditions:

  1. Stop the engine.
    1. Secure good ventilation (the gas leak detector may not react to volatile gases which are not refrigerant, such as evaporated gasoline and exhaust gas).
    2.  
    3. Repeat the test 2 or 3 times.
    4.  
    5. Make sure that there is some refrigerant remaining in the refrigeration system. When compressor is off: approx. 392 to 588 kPa (4 to 6 kgf/cm2, 57 to 85 psi)
    6.  

  2.  
  3. Bring the gas leak detector close to the drain hose before performing the test.
    NOTE
    After the blower motor has stopped, leave the cooling unit for more than 15 minutes. Expose the gas leak detector sensor under the drain hose. When bringing the gas leak detector close to the drain hose, make sure that the gas leak detector does not react to the volatile gases.



    Click image to see an enlarged view

    Fig. Bring the gas leak detector close to the drain hose before performing the test

  4.  
  5. If such reaction is unavoidable, the vehicle must be lifted up.
  6.  
  7. If a gas leak is not detected on the drain hose, remove the blower motor control (blower resistor) from the cooling unit. Insert the gas leak detector sensor into the unit and perform the test.
  8.  
  9. Disconnect the connector and leave the pressure switch for approximately 20 minutes. Bring the gas leak detector close to the pressure switch and perform the test.
  10.  
  11. Bring the gas leak detector close to the refrigerant lines and perform the test.
  12.  

Highlander Hybrid




CAUTION
Refer to the applicable precautions for this system before performing the following operation. Failure to follow the warnings and cautions could result in possible personal injury or death.


CAUTION
Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat. Be careful when connecting service equipment. Do not breathe refrigerant or vapor.

Use only service equipment that is U.L.-listed and is certified to meet the requirements of SAE J2210 to remove HFC-134a (R-134a) from the air conditioning system.

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

  1. Carry out under the following conditions::
    1. Stop the engine.
    2.  
    3. Secure good ventilation (the gas leak detector may react to volatile gases which are not refrigerant, such as evaporated gasoline and exhaust gas).
    4.  
    5. Repeat the test 2 or 3 times.
    6.  
    7. Make sure that there is some refrigerant remaining in the refrigeration system. When the compressor is off: approx. 392 to 588 kPa (4 to 6 kgf/cm2, 57 to 85 psi)
    8.  

  2.  
  3. Using a gas leak detector, check for leakage of the refrigerant line.

    Click image to see an enlarged view

    Fig. Using a gas leak detector, check for leakage of the refrigerant line

  4.  
  5. Bring the gas leak detector close to the drain hose with the detector's power off.
    NOTE
    After the blower motor has stopped, let the cooling unit stand for more than 15 minutes. Bring the gas leak detector sensor under the drain hose. When bringing the gas leak detector close to the drain hose, make sure that the gas leak detector does not react to volatile gases. If such reaction is unavoidable, the vehicle must be lifted up.

  6.  
  7. If a gas leak is not detected on the drain hose, remove the blower motor control from the cooling unit. Insert the gas leak detector sensor into the unit and perform the test.
  8.  
  9. Disconnect the pressure switch connector and leave it for approximately 20 minutes. Bring the gas leak detector close to the pressure switch and perform the test.

    Click image to see an enlarged view

    Fig. Bring the gas leak detector close to the drain hose with the detector's power off

  10.  

 
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