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Nissan Versa Sedan. Manual - part 476

PRECAUTIONS

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PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"

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The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along

with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain

types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS

system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front

air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

Information necessary to service the system safely is included in the SR and SB section of this Service Man-

ual.

WARNING:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision which would result in air bag inflation, all maintenance must be performed by

an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag

Module, see the SR section.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-

ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-

tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a

hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing

serious injury.

• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

Procedure without Cowl Top Cover

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When performing the procedure after removing cowl top cover, cover

the lower end of windshield with urethane, etc.

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

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WARNING:

• 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. Refer to

HA-17, "Leak Test"

. To determine the purity

of HFC-134a (R-134a) in the vehicle and recovery tank, use Refrigerant Recovery/Recycling Recharg-

ing equipment and Refrigerant Identifier.

• 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.

• The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following

handling precautions must be observed:

PIIB3706J

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PRECAUTIONS

- When removing refrigerant components from a vehicle, immediately cap (seal) the component to

minimize the entry of moisture from the atmosphere.

- 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.

- 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.

- 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 require-

ments of SAE J2210 [HFC-134a (R-134a) recycling equipment], or J2209 [HFC-134a (R-134a) recy-

cling equipment], If accidental system discharge occurs, ventilate work area before resuming

service. Additional health and safety information may be obtained from refrigerant and oil manufac-

turers.

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

Contaminated Refrigerant

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If a refrigerant other than pure HFC-134a (R-134a) is identified in a vehicle, your options are:

• Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant into

the atmosphere.

• Explain that recovery of the contaminated refrigerant could damage your service equipment and refrigerant

supply.

• Suggest the customer return the vehicle to the location of previous service where the contamination may

have occurred.

• If you choose to perform the repair, recover the refrigerant using only dedicated equipment and contain-

ers. 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 ser-

vice. 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.

• If the vehicle is within the warranty period, the air conditioner warranty is void. Please contact NISSAN Cus-

tomer Affairs for further assistance.

Precaution for Leak Detection Dye

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• 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.

• Always wear fluorescence enhancing UV safety goggles to protect your eyes and enhance the visibility of

the fluorescent dye.

• 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).

• Always remove any dye from the leak area after repairs are complete to avoid a misdiagnosis during a future

service.

• 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.

• Do not spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.).

• Do not use more than one refrigerant dye bottle (1/4 ounce / 7.4 cc) per A/C system.

• Leak detection dyes for HFC-134a (R-134a) and HC-12 (R-12) A/C systems are different. Do not use HFC-

134a (R-134a) leak detection dye in R-12 A/C systems or HC-12 (R-12) leak detection dye in HFC-134a (R-

134a) A/C systems or A/C system damage may result.

• The fluorescent properties of the dye will remain for over three (3) years unless a compressor failure occurs.

Precaution for Refrigerant Connection

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A new type refrigerant connection has been introduced to all refrigerant lines except the following location.

• Expansion valve to evaporator

• Refrigerant pressure sensor to condenser

PRECAUTIONS

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FEATURES OF NEW TYPE REFRIGERANT CONNECTION

• The O-ring has been relocated. It has also been provided with a groove for proper installation. This elimi-

nates 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 charac-

teristics.

• O-rings facilitate piping connections because the reaction force of the O-ring will not occur in the direction

that causes the joint to pull out.

O-RING AND REFRIGERANT CONNECTION

WJIA1994E

Plug

O-ring

Torque wrench

Apply oil

Do not apply oil to thread

No good

Good

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PRECAUTIONS

A/C System

WARNING:

Make sure all refrigerant is discharged into the recycling equipment and the pressure in the system is

less than atmospheric pressure. Then gradually loosen the discharge side hose fitting and remove it.

CAUTION:

The new and former refrigerant connections use different O-ring configurations. Do not confuse O-

rings, since they are not interchangeable. If a wrong O-ring is installed, refrigerant will leak at, or

around, the connection.

O-Ring Specifications*

* : Always check with the Parts Department for the latest parts information.

AWIIA1611ZZ

A/C unit assembly

O-ring

High-pressure pipe

Condenser

Liquid tank

Refrigerant pressure sensor

High-pressure flexible hose

Compressor

Low-pressure flexible hose

Connection type

Piping connection point

QTY

O-ring size

New

Condenser to high-pressure flexible hose

Condenser to high-pressure pipe

Low-pressure flexible hose to expansion valve

High-pressure pipe to expansion valve

Compressor to low-pressure flexible hose

Compressor to high-pressure flexible hose

Liquid tank to condenser pipe

Inlet

Outlet

Former

Refrigerant pressure sensor to condenser

Expansion valve to evaporator

Inlet

Outlet

Content .. 474 475 476 477 ..