GrandCaravan 2008

Leak Testing

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Specific to:

Chrysler Town & Country 2008-2009

Dodge Grand Caravan 2008-2009


CAUTION
The R-134a service equipment and the vehicle A/C system should never be pressure tested or leak tested with compressed air. A mixture of air and R-134a can be combustible at elevated pressures. These mixtures are potentially dangerous and may result in fire or explosion causing property damage, personal injury or death.


CAUTION
Avoid breathing the A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose, and throat. Use only the approved service equipment meeting SAE requirements to discharge the R-134a system. If an accidental system discharge occurs, ventilate the work area before resuming service.

If the A/C system is not cooling properly, determine if the refrigerant system is fully charged with R-134a by performing a Refrigerant System Charge Level test or by completely evacuating and recharging the A/C system. Follow the instructions on the manufacture-s R-134a refrigerant recovery/recycling/charging station to perform a charge level test. If the A/C liquid line pressure is found to be less than 50 psi (345 kPa), proceed to the System Empty procedure below. If the liquid line pressure is found to be greater than 50 psi (345 kPa), proceed to the System Low procedure. If the refrigerant system is empty or low in refrigerant charge, a leak at any line fitting or component seal is likely. Inspect the fittings, lines, and components for oily residue to indicate a leak location.

System Empty



Specific to:

Chrysler Town & Country 2008-2009

Dodge Grand Caravan 2008-2009

  1. Evacuate the refrigerant system to the lowest degree of vacuum possible (approximately 28 inches Hg.). Refer to Evacuating the System.
  2.  
  3. Determine if the system holds a vacuum for 15 minutes.
    1. If a vacuum is held, a leak is probably not present.
    2.  
    3. If the system will not maintain vacuum level, proceed to the next step.
    4.  

  4.  
  5. Prepare and dispense 10 ounces (0.284 kilograms) of R-134a refrigerant into the evacuated refrigerant system. Refer to Charging the System.
  6.  
  7. Proceed to the System Low procedure.
  8.  

System Low



Specific to:

Chrysler Town & Country 2008-2009

Dodge Grand Caravan 2008-2009

  1. Determine if there is any R-134a refrigerant in the system.
  2.  
  3. Position the vehicle in a wind free work area. This will aid in detecting small leaks.
  4.  
  5. Bring the refrigerant system up to operating temperature and pressure. This is done by allowing the engine to run for 5 minutes with the A/C system set to the following:
    1. The transmission should be in Park or Neutral (depending on application) with the parking brake set and the engine idling.
    2.  
    3. The mode control set to the fresh air position.
    4.  
    5. The blower control set to the high speed position.
    6.  
    7. The temperature control set to full cold position.
    8.  
    9. The A/C set to the ON position and panel mode.
    10.  
    11. All windows open.
      NOTE
      A leak detector that is designed for R-12 refrigerant only, will not detect leaks in a R-134a refrigerant system.

    12.  

  6.  
  7. Shut the vehicle OFF and wait 2-7 minutes. Then, use an electronic leak detector that is designed to detect R-134a refrigerant and search for leaks. Fittings, lines, or components that appear to be oily usually indicate a refrigerant leak.
  8.  
  9. To inspect the A/C evaporator for leaks, insert the leak detector probe into the drain tube opening or an air outlet.
  10.  
  11. A dye for R-134a is available to aid in leak detection. Use only Daimler Chrysler® approved refrigerant dye.
  12.  

 
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