Pilot 2006-2008

Leak Testing

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Electronic Refrigerant Leak Detector



Specific to:

Honda Pilot 2006-2008


NOTE
When performing a refrigerant leak check, use a J-41995 A/C leak detector or equivalent. Ensure that the instrument is calibrated and set properly per the operating instructions. The leak detector is a delicate device. In order to use the leak detector properly, read the operating instructions and perform any specified maintenance.

Other gases in the work area or substances on the A/C components, for example, anti-freeze, windshield washer fluid, solvents and lubricants, may falsely trigger the leak detector. Make sure the surfaces to be checked are clean. Clean with a dry cloth or blow off with shop air.


WARNING
Do not allow the sensor tip of the detector to contact with any substance. This can also cause false readings and may damage the detector.


NOTE
When performing the leak test, note the following:



Position probe approximately 5 mm ( 3 / 16 in.) away from point to be checked.
 
When testing, circle each fitting completely with probe.
 
Move probe along component approximately 25 to 50 mm (1 to 2 in.) per sec.
 


NOTE
To prevent inaccurate or false readings, make sure there is no refrigerant vapor, shop chemicals, or cigarette smoke in the vicinity of the vehicle. Perform the leak test in calm area (low air/wind movement) so that the leaking refrigerant is not dispersed.

  1. Turn engine off.
  2.  
  3. Connect a suitable A/C manifold gauge set to the A/C service ports.
  4.  
  5. Check if the A/C refrigerant pressure is at least 50 psi above 16°C (61°F). If less than specification, recover/evacuate and recharge the system with the specified amount of refrigerant.
    NOTE
    At temperatures below 61°F (16°C), leaks may not be detected since the system may not reach 50 psi.

  6.  
  7. Conduct the leak test from the high side (compressor discharge to evaporator inlet) to the low side (evaporator drain hose to compressor shaft seal). Perform a leak check for the following areas carefully.
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  9. Clean the component to be checked and move the leak detector probe completely around the connection/component.
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  11. For the compressor, check the fitting of high and low pressure hoses, relief valve and shaft seal.
  12.  
  13. For the liquid tank, check the tube fitting.
  14.  
  15. For the service valves, check all around the service valves. Ensure service valve caps are secured on the service valves (to prevent leaks).
    NOTE
    After removing A/C manifold gauge set from service valves, wipe any residue from valves to prevent any false readings by leak detector.

  16.  
  17. For the cooling unit (Evaporator), with engine OFF , turn blower fan on High for at least 15 seconds to dissipate any refrigerant trace in the cooling unit. Wait a minimum of 15 minutes accumulation time before inserting the leak detector probe into the drain hose. Keep the probe inserted for at least ten seconds. Use caution not to contaminate the probe tip with water or dirt that may be in the drain hose.
  18.  
  19. If a leak detector detects a leak, verify at least once by blowing compressed air into area of suspected leak, then repeat check as outlined above.
  20.  
  21. Do not stop when one leak is found. Continue to check for additional leaks at all system components.
  22.  

Preliminary Check



Specific to:

Honda Pilot 2006-2008

  1. Perform a visual inspection of all refrigeration parts, fittings, hoses and components for signs of A/C lubricant leakage, damage and corrosion. A/C lubricant leakage may indicate an area of refrigerant leakage. Allow extra inspection time in these areas when using either an electronic refrigerant leak detector or fluorescent dye leak detector.
  2.  
  3. If dye is observed, confirm the leak with an electronic refrigerant leak detector. It is possible a prior leak was repaired and not properly cleaned.
  4.  
  5. When searching for leaks, do not stop when one leak is found but continue to check for additional leaks at all system components and connections.
  6.  
  7. When searching for refrigerant leaks using an electronic leak detector, move the probe along the suspected leak area at 25 to 50 mm (1 to 2 in.) per second and no further than 1 / 4 in. from the component.
    NOTE
    Moving the electronic leak detector probe slower and closer to the suspected leak area will improve the chances of finding a leak.

  8.  

 
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