Sentra 2008

Safety Warnings

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Specific to:

Nissan Sentra 2007-2012

Precaution For Work

  1. When removing or disassembling each component, be careful not to damage or deform it. If a component may be subject to interference, be sure to protect it with a shop cloth.
  2.  
  3. When removing (disengaging) components with a screwdriver or similar tool, be sure to wrap the component with a shop cloth or vinyl tape to protect it.
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  5. Protect the removed parts with a shop cloth and keep them.
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  7. Replace a deformed or damaged clip.
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  9. If a part is specified as a non-reusable part, always replace it with new one.
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  11. Be sure to tighten bolts and nuts securely to the specified torque.
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  13. After re-installation is completed, be sure to check that each part works normally.
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  15. Follow the steps below to clean components.
    1. Water soluble dirt: Dip a soft cloth into lukewarm water, and wring the water out of the cloth to wipe the dirty area. Then rub with a soft and dry cloth.
    2.  
    3. Oily dirt: Dip a soft cloth into lukewarm water with mild detergent (concentration: within 2 to 3%), and wipe the dirty area. Then dip a cloth into fresh water, and wring the water out of the cloth to wipe the detergent off. Then rub with a soft and dry cloth.
      NOTE
      Do not use organic solvent such as thinner, benzene, alcohol, or gasoline.


      NOTE
      For genuine leather seats, use a genuine leather seat cleaner.

    4.  

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Precaution for Working with HFC-134a (R-134a)


NOTE
CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants are mixed compressor failure is likely to occur. To determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use Refrigerant Recovery/Recycling Recharging equipment and Refrigerant Identifier.


NOTE
Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components. If oil other than that specified is used, compressor failure is likely to occur.


NOTE
The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following handling precautions must be observed:


NOTE
When removing refrigerant components from a vehicle, immediately cap (seal) the component to minimize the entry of moisture from the atmosphere.


NOTE
When installing refrigerant components to a vehicle, do not remove the caps (unseal) until just before connecting the components. Connect all refrigerant loop components as quickly as possible to minimize the entry of moisture into system.


NOTE
Only use the specified oil from a sealed container. Immediately reseal containers of oil. Without proper sealing, oil will become moisture saturated and should not be used.


NOTE
Avoid breathing A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat. Remove HFC-134a (R-134a) from the A/C system using certified service equipment meeting requirements of SAE J2210 [HFC-134a (R-134a) recycling equipment], or J2209 [HFC-134a (R-134a) recycling equipment], If accidental system discharge occurs, ventilate work area before resuming service. Additional health and safety information may be obtained from refrigerant and oil manufacturers.


NOTE
Do not allow A/C oil to come in contact with styrofoam parts. Damage may result.

Contaminated Refrigerant

  1. If a refrigerant other than pure HFC-134a (R-134a) is identified in a vehicle, your options are:
    1. Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant into the atmosphere.
    2.  
    3. Explain that recovery of the contaminated refrigerant could damage your service equipment and refrigerant supply.
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    5. Suggest the customer return the vehicle to the location of previous service where the contamination may have occurred.
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    7. If you choose to perform the repair, recover the refrigerant using only dedicated equipment and containers. Do not recover contaminated refrigerant into your existing service equipment. If your facility does not have dedicated recovery equipment, you may contact a local refrigerant product retailer for available service. This refrigerant must be disposed of in accordance with all federal and local regulations. In addition, replacement of all refrigerant system components on the vehicle is recommended.
    8.  

  2.  
  3. If the vehicle is within the warranty period, the air conditioner warranty is void. Please contact NISSAN Customer Affairs for further assistance.
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General Refrigerant Precaution


NOTE
Do not release refrigerant into the air. Use approved recovery/recycling equipment to capture the refrigerant every time an air conditioning system is discharged.


NOTE
Always wear eye and hand protection (goggles and gloves) when working with any refrigerant or air conditioning system.


NOTE
Do not store or heat refrigerant containers above 125°F (52°C).


NOTE
Do not heat a refrigerant container with an open flame; if container warming is required, place the bottom of the container in a warm pail of water.


NOTE
Do not intentionally drop, puncture, or incinerate refrigerant containers.


NOTE
Keep refrigerant away from open flames: poisonous gas will be produced if refrigerant burns.


NOTE
Refrigerant will displace oxygen, therefore be certain to work in well ventilated areas to prevent suffocation.


NOTE
Do not pressure test or leak test HFC-134a (R-134a) service equipment and/or vehicle air conditioning systems with compressed air during repair. Some mixtures of air and HFC-134a (R-134a) have been shown to be combustible at elevated pressures. These mixtures, if ignited, may cause injury or property damage. Additional health and safety information may be obtained from refrigerant manufacturers.

Precaution for Leak Detection Dye

  1. The A/C system contains a fluorescent leak detection dye used for locating refrigerant leaks. An ultraviolet (UV) lamp is required to illuminate the dye when inspecting for leaks.
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  3. Always wear fluorescence enhancing UV safety goggles to protect your eyes and enhance the visibility of the fluorescent dye.
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  5. A compressor shaft seal should not be repaired because of dye seepage. The compressor shaft seal should only be repaired after confirming the leak with an electronic refrigerant leak detector (J-41995).
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  7. Always remove any dye from the leak area after repairs are complete to avoid a misdiagnosis during a future service.
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  9. Do not allow dye to come into contact with painted body panels or interior components. If dye is spilled, clean immediately with the approved dye cleaner. Fluorescent dye left on a surface for an extended period of time cannot be removed.
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  11. Do not spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.).
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  13. Do not use more than one refrigerant dye bottle (1/4 ounce / 7.4 cc) per A/C system.
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  15. Leak detection dyes for HFC-134a (R-134a) and CFC-12 (R-12) A/C systems are different. Do not use HFC-134a (R-134a) leak detection dye in CFC-12 (R-12) A/C systems or CFC-12 (R-12) leak detection dye in HFC-134a (R-134a) A/C systems or A/C system damage may result.
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  17. The fluorescent properties of the dye will remain for over three (3) years unless a compressor failure occurs.
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A/C Identification Label

  1. Vehicles with factory installed fluorescent dye have this green identification label on the underside of hood.
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Precaution for Refrigerant Connection

  1. A new type refrigerant connection has been introduced to all refrigerant lines except the following locations
    1. Expansion valve to cooling unit
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    3. Evaporator pipes to evaporator (inside cooling unit)
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    5. Refrigerant pressure sensor
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  2.  

Features Of New Type Refrigerant Connection

  1. The O-ring has been relocated. It has also been provided with a groove for proper installation. This eliminates the chance of the O-ring being caught in, or damaged by, the mating part. The sealing direction of the O-ring is now set vertically in relation to the contacting surface of the mating part to improve sealing characteristics.
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  3. The reaction force of the O-ring will not occur in the direction that causes the joint to pull out, thereby facilitating piping connections.

    Click image to see an enlarged view

    Fig. O-Ring and refrigerant connection

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