Nissan Versa 2008 Owner's Manual
AIR CONDITIONER
Revision: May 2007 2008 Versa
A
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SECTION MTC
MANUAL AIR CONDITIONER
CONTENTS
SERVICE INFORMATION ............................ 3
PRECAUTIONS ................................................... 3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
Precaution for Procedure without Cowl Top Cover ......3
Precaution for Working with HFC-134a (R-134a) ......3
General Refrigerant Precaution ................................4
Oil Precaution ............................................................4
Precaution for Refrigerant Connection ......................4
Precaution for Service of Compressor ......................7
Precaution for Service Equipment .............................7
Precaution for Leak Detection Dye ...........................9
PREPARATION ..................................................10
Special Service Tool ...............................................10
HFC-134a (R-134a) Service Tool and Equipment .... 10
Commercial Service Tool ........................................13
REFRIGERATION SYSTEM ..............................14
Refrigerant Cycle ....................................................14
Refrigerant System Protection ................................14
Component Part Location .......................................15
OIL ......................................................................16
Maintenance of Oil Quantity in Compressor ...........16
AIR CONDITIONER CONTROL .........................19
Control Operation ....................................................19
Discharge Air Flow ..................................................20
System Description .................................................20
CAN Communication System Description ...............21
TROUBLE DIAGNOSIS .....................................22
CONSULT-III Function (BCM) ................................. 22
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ......................................................
Component Parts and Harness Connector Loca-
tion ..........................................................................
Schematic ...............................................................25
Wiring Diagram - Heater - .......................................26
22
23
Wiring Diagram - A/C,M - ........................................27
Operational Check ...................................................30
Mode Door ...............................................................31
Air Mix Door .............................................................32
Intake Door ..............................................................33
3
Front Blower Motor Circuit .......................................33
Magnet Clutch Circuit (If Equipped) .........................37
Insufficient Cooling ..................................................45
Insufficient Heating ..................................................52
Noise .......................................................................53
CONTROLLER ..................................................55
Removal and Installation .........................................55
Disassembly and Assembly .....................................56
THERMO CONTROL AMPLIFIER ....................57
Removal and Installation .........................................57
A/C UNIT ASSEMBLY ......................................58
Removal and Installation .........................................58
Disassembly and Assembly .....................................60
BLOWER MOTOR ............................................62
Removal and Installation .........................................62
INTAKE DOOR ..................................................63
Intake Door Cable Adjustment .................................63
AIR MIX DOOR .................................................64
Air Mix Door Cable Adjustment ...............................64
MODE DOOR ....................................................65
Mode Door Cable Adjustment .................................65
BLOWER FAN RESISTOR ...............................66
Removal and Installation .........................................66
HEATER CORE .................................................67
Removal and Installation .........................................67
AIR CONDITIONER FILTER .............................68
Removal and Installation .........................................68
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DUCTS AND GRILLES ...................................... 69
Revision: May 2007 2008 Versa
Removal and Installation ........................................ 69
REFRIGERANT LINES ...................................... 74
HFC-134a (R-134a) Service Procedure ................. 74
Component ............................................................. 76
Removal and Installation of Compressor ................ 78
Removal and Installation of Low-Pressure Flexi-
ble Hose .................................................................
Removal and Installation of High-pressure Flexi-
ble Hose .................................................................
Removal and Installation of High-pressure Pipe .... 81
Removal and Installation of Refrigerant Pressure
Sensor ....................................................................
Removal and Installation of Condenser .................. 82
Removal and Installation of Liquid Tank ................. 82
79
80
81
Removal and Installation of Evaporator .................. 83
Removal and Installation of Expansion Valve ......... 84
Checking of Refrigerant Leaks ................................ 84
Checking System for Leaks Using the Fluorescent
Leak Detector ..........................................................
Dye Injection ........................................................... 85
Electronic Refrigerant Leak Detector ...................... 85
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
Compressor ............................................................ 88
Oil ............................................................................88
Refrigerant .............................................................. 88
Engine Idling Speed ................................................ 88
Belt Tension ............................................................ 88
85
88
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PRECAUTIONS
SERVICE INFORMATION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
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 SRS and SB section of this Service Manual.
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 SRS 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 harness connectors.
Precaution for Procedure without Cowl Top Cover
INFOID:0000000001704274
INFOID:0000000001704275
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When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
PIIB3706J
Precaution for Working with HFC-134a (R-134a)
WARNING:
• CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. These refrigerants
must never be mixed, even in the smallest amounts. If the refrigerants are mixed a compressor malfunction is likely to occur.
• 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 malfunction is likely to occur.
• The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following
handling precautions must be observed:
- 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.
Use only approved recovery/recycling equipment to discharge HFC-134a (R-134a) refrigerant. If accidental system discharge occurs, ventilate work area before resuming service. Additional health and
safety information may be obtained from refrigerant and oil manufacturers.
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PRECAUTIONS
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< SERVICE INFORMATION >
- Do not allow A/C oil to come in contact with styrofoam parts. Damage may result.
General Refrigerant Precaution
INFOID:0000000001704277
WARNING:
• Avoid breathing A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat.
Use only approved recovery/recycling equipment to discharge HFC-134a (R-134a) refrigerant. If accidental system discharge occurs, ventilate work area before resuming service. Additional health and
safety information may be obtained from refrigerant and oil manufacturers.
• Do not release refrigerant into the air. Use approved recovery/recycling equipment to capture the
refrigerant every time an air conditioning system is discharged.
• Always wear eye and hand protection (goggles and gloves) when working with any refrigerant or air
conditioning system.
• Do not store or heat refrigerant containers above 52°C (126° F).
• 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.
• Do not intentionally drop, puncture, or incinerate refrigerant containers.
• Keep refrigerant away from open flames: poisonous gas will be produced if refrigerant burns.
• Refrigerant will displace oxygen, therefore be certain to work in well ventilated areas to prevent suffocation.
• 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.
Oil Precaution
INFOID:0000000001704278
• 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 malfunction is likely to occur.
• The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following handling
precautions must be observed:
- 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.
Use only approved recovery/recycling equipment to discharge HFC-134a (R-134a) refrigerant. If accidental
system discharge occurs, ventilate work area before resuming service. Additional health and safety information may be obtained from refrigerant and oil manufacturers.
• Do not allow A/C oil to come in contact with styrofoam parts. Damage may result.
Precaution for Refrigerant Connection
INFOID:0000000001704279
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
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PRECAUTIONS
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< SERVICE INFORMATION >
FEATURES OF NEW TYPE REFRIGERANT CONNECTION
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SHA815E
• 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.
• The reaction force of the O-ring will not occur in the direction that causes the joint to pull out, thereby facilitating piping connections.
O-RING AND REFRIGERANT CONNECTION
TYPE 1
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PRECAUTIONS
TYPE 2
SJIA1327E
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 Orings since they are not interchangeable. If a wrong O-ring is installed, refrigerant will leak at, or
around, the connection.
O-Ring Part Numbers and Specifications
Connection type Piping connection point Part number QTY O-ring size
Condenser to high-pressure flexible hose 92472 N8210 1 12
Condenser to high-pressure pipe 92471 N8210 1 8
Low-pressure flexible hose to expansion valve 92473 N8210 1 16
New
Former
High-pressure pipe to expansion valve 92471 N8210 1 8
Compressor to low-pressure flexible hose 92474 N8210 1 19
Compressor to high-pressure flexible hose 92472 N8210 1 12
Liquid tank to condenser pipe
Refrigerant pressure sensor to condenser J2476 89956 1 10
Expansion valve to evaporator
Inlet
Outlet 1
Inlet 92471 N8200 2 12
Outlet 92473 N8200 2 16
92471 N8210
1
8
CAUTION:
When replacing or cleaning refrigerant cycle components, observe the following.
• When the compressor is removed, store it in the same position as it is when mounted on the vehicle.
Doing so will cause oil to enter the low-pressure chamber.
• When connecting tubes, always use a torque wrench and a back-up wrench.
• After disconnecting tubes, immediately plug all openings to prevent entry of dirt and moisture.
• When installing an air conditioner in the vehicle, connect the pipes as the final stage of the operation. Do not remove the seal caps of pipes and other components until just before required for connection.
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PRECAUTIONS
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< SERVICE INFORMATION >
• Allow components stored in cool areas to warm to working area temperature before removing seal
caps. This prevents condensation from forming inside A/C components.
• Thoroughly remove moisture from the refrigeration system before charging the refrigerant.
• Always replace used O-rings.
• When connecting tube, apply the specified A/C oil to circle of the O-rings as shown. Be careful not to
apply oil to threaded portion. Refer to MTC-88, "
• O-ring must be closely attached to dented portion of tube.
• When replacing the O-ring, be careful not to damage O-ring and tube.
• Connect tube until you hear it click, then tighten the nut or bolt by hand until snug. Make sure that
the O-ring is installed to tube correctly.
• After connecting line, perform leak test and make sure that there is no leakage from connections.
When the refrigerant leaking point is found, disconnect that line and replace the O-ring. Then tighten
connections of seal seat to the specified torque.
Oil".
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RHA861F
Precaution for Service of Compressor
INFOID:0000000001704280
• Plug all openings to prevent moisture and foreign matter from entering.
• When the compressor is removed, store it in the same position as it is when mounted on the car.
• When replacing or repairing compressor, follow “Maintenance of Oil Quantity in Compressor”
exactly. Refer to MTC-16, "
Maintenance of Oil Quantity in Compressor" .
• Keep friction surfaces between clutch and pulley clean. If the surface is contaminated, with oil, wipe
it off by using a clean waste cloth moistened with thinner.
• After compressor service operation, turn the compressor shaft by hand more than five turns in both
directions. This will equally distribute oil inside the compressor. After the compressor is installed,
let the engine idle and operate the compressor for one hour.
• After replacing the compressor magnet clutch, apply voltage to the new one and check for usual
operation.
Precaution for Service Equipment
INFOID:0000000001704281
RECOVERY/RECYCLING EQUIPMENT
Be certain to follow the manufacturer’s instructions for machine operation and machine maintenance. Never
introduce any refrigerant other than that specified into the machine.
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ELECTRONIC LEAK DETECTOR
Be certain to follow the manufacturer’s instructions for tester operation and tester maintenance.
VACUUM PUMP
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PRECAUTIONS
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< SERVICE INFORMATION >
The oil contained inside the vacuum pump is not compatible with the
specified oil for HFC-134a (R-134a) A/C systems. The vent side of
the vacuum pump is exposed to atmospheric pressure. So the vacuum pump oil may migrate out of the pump into the service hose.
This is possible when the pump is switched off after evacuation (vacuuming) and hose is connected to it.
To prevent this migration, use a manual valve placed near the hoseto-pump connection, as follows.
• Usually vacuum pumps have a manual isolator valve as part of the
pump. Close this valve to isolate the service hose from the pump.
• For pumps without an isolator, use a hose equipped with a manual
shut-off valve near the pump end. Close the valve to isolate the
hose from the pump.
• If the hose has an automatic shut-off valve, disconnect the hose
from the pump. As long as the hose is connected, the valve is open
and lubricating oil may migrate.
Some one-way valves open when vacuum is applied and close
under a no vacuum condition. Such valves may restrict the pump’s
ability to pull a deep vacuum and are not recommended.
MANIFOLD GAUGE SET
Be certain that the gauge face indicates HFC-134a or R-134a. Be
sure the gauge set has 1/2″-16 ACME threaded connections for service hoses. Confirm the set has been used only with refrigerant
HFC-134a (R-134a) and specified oils.
SERVICE HOSES
Be certain that the service hoses display the markings described
(colored hose with black stripe). All hoses must include positive shutoff devices (either manual or automatic) near the end of the hoses
opposite the manifold gauge.
RHA270DA
SHA533D
SERVICE COUPLERS
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PRECAUTIONS
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< SERVICE INFORMATION >
Never attempt to connect HFC-134a (R-134a) service couplers to a
CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers will
not properly connect to the CFC-12 (R-12) system. However, if an
improper connection is attempted, discharging and contamination
may occur.
Shut-off valve rotation A/C service valve
Clockwise Open
Counterclockwise Close
REFRIGERANT WEIGHT SCALE
Verify that no refrigerant other than HFC-134a (R-134a) and specified oils have been used with the scale. If the scale controls refrigerant flow electronically, the hose fitting must be 1/2″-16 ACME.
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RHA273D
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RHA274D
CHARGING CYLINDER
Using a charging cylinder is not recommended. Refrigerant may be vented into air from cylinder’s top valve
when filling the cylinder with refrigerant. Also, the accuracy of the cylinder is generally less than that of an
electronic scale or of quality recycle/recharge equipment.
Precaution for Leak Detection Dye
• 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.
• The fluorescent dye leak detector is not a replacement for an electronic refrigerant leak detector. The fluorescent dye leak detector should be used in conjunction with an electronic refrigerant leak detector to pinpoint refrigerant leaks.
• For your safety and your customer’s satisfaction, read and follow all manufacture’s operating instructions
and precautions prior to performing the work.
• 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.
• Always remove any remaining 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 CFC-12 (R-12) A/C systems are different. Do not use HFC134a (R-134a) leak detection dye in CFC-12 (R-12) A/C system or CFC-12 (R-12) leak detector dye in HFC134a (R-134a) A/C system or A/C system damage may result.
• The fluorescent properties of the dye will remain for over three (3) years unless a compressor malfunction
occurs.
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IDENTIFICATION LABEL FOR VEHICLE
Vehicles with factory installed fluorescent dye have this identification label on the front side of hood.
NOTE:
• Vehicles with factory installed fluorescent dye have a green label.
• Vehicles without factory installed fluorescent dye have a blue label.
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PREPARATION
PREPARATION
Special Service Tool
INFOID:0000000001704283
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name
—
(J-38873-A)
Pulley installer
LHA171
KV99233130
(J-29884)
Pulley puller
LHA172
HFC-134a (R-134a) Service Tool and Equipment
Description
Installing pulley
Removing pulley
INFOID:0000000001704284
Never mix HFC-134a refrigerant and/or its specified oil with CFC-12 (R-12) refrigerant and/or its oil.
Separate and non-interchangeable service equipment must be used for handling each type of refrigerant/oil.
Refrigerant container fittings, service hose fittings and service equipment fittings (equipment which handles
refrigerant and/or oil) are different between CFC-12 (R-12) and HFC-134a (R-134a). This is to avoid mixed
use of the refrigerants/oil.
Adapters that convert one size fitting to another must never be used refrigerant/oil contamination will occur
and compressor failure will result.
Tool number
(Kent-Moore No.)
Tool name
HFC-134a (R-134a)
(—)
Refrigerant
S-NT196
—
(—)
NISSAN A/C System Oil Type S
Description
Container color: Light blue
Container marking: HFC-134a (R134a)
Fitting size: Thread size
• large container 1/2”-16 ACME
Type: Poly Alkylene glycol oil (PAG),
type S
Application: HFC-134a (R-134a) variable displacement swash plate compressors (NISSAN only)
S-NT197
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PREPARATION
Tool number
(Kent-Moore No.)
Tool name
—
(—)
NISSAN A/C System Oil Type R
KV991J0130
(ACR2005-NI)
ACR5 A/C Service Center
—
(J-41995)
Electronic refrigerant leak detector
S-NT197
WJIA0293E
Description
Type: Poly Alkylene glycol oil (PAG),
type R
Application: HFC-134a (R-134a) vane
rotary compressors (NISSAN only)
Refrigerant recovery, recycling and recharging
Checking for refrigerant leaks
Power supply: DC 12V (battery terminal)
A
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F
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—
(J-43926)
Refrigerant dye leak detection kit
Kit includes:
(J-42220)
UV lamp and UV safety goggles
(J-41459)
Refrigerant dye injector
(J-41447)
Quantity 24, 1/4 ounce bottles of
HFC-134a (R-134a) fluorescent
leak detection dye
(J-43872)
Refrigerant dye cleaner
—
(J-42220)
Fluorescent dye leak detector
—
(J-41447)
HFC-134a (R-134a) fluorescent
leak detection dye
(Box of 24, 1/4 ounce bottles)
SHA438F
AHA281A
ZHA200H
Leak detection dye
Power supply: DC 12V (battery terminal)
Checking for refrigerant leaks when fluorescent dye is installed in A/C system.
Includes: UV lamp and UV safety goggles
Power supply: DC 12V (battery terminal)
Application: For HFC-134a (R-134a)
PAG o i l
Container: 1/4 ounce (7.4cc) bottle
(Includes self-adhesive dye identification labels for affixing to vehicle after
charging system with dye.)
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SHA439F
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PREPARATION
Tool number
(Kent-Moore No.)
Tool name
—
(J-41459)
HFC-134a (R-134a) Dye injector
Use with (J-41447) 1/4 ounce bottles
—
(J-43872)
Refrigerant dye cleaner
—
(J-39183-C)
Manifold gauge set (with hoses
and couplers)
Description
For injecting 1/4 ounce of fluorescent
leak detection dye into A/C system.
SHA440F
For cleaning dye spills.
SHA441F
Identification:
• The gauge face indicates R-134a.
Fitting size: Thread size
• 1/2”-16 ACME
Service hoses:
• (J-39500-72B)
High side hose
• (J-39500-72R)
Low side hose
• (J-39500-72Y)
Utility hose
Service couplers:
• (J-39500-20A)
High side coupler
• (J-39500-24A)
Low side coupler
RJIA0196E
Hose colors:
• Low side hose: Blue with black stripe
• High side hose: Red with black stripe
• Utility hose: Yellow with black stripe
or green with black stripe
Hose fitting to gauge:
• 1/2”-16 ACME
S-NT201
Hose fitting to service hose:
• M14 x 1.5 fitting is optional or permanently attached.
S-NT202
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PREPARATION
Tool number
(Kent-Moore No.)
Tool name
—
(J-39699)
Refrigerant weight scale
—
(J-39649)
Vac u u m pump
(Including the isolator valve)
Commercial Service Tool
(Kent-Moore No.)
Tool name
(J-41810-NI)
Refrigerant identifier equipment (R134a)
S-NT200
S-NT203
Description
For measuring of refrigerant
Fitting size - thread size:
• 1/2” - 16 ACME
Capacity:
• Air displacement: 4 CFM
• Micron rating: 20 microns
• Oil capacity: 482 g (17 oz)
Fitting size: Thread size
• 1/2”-16 ACME
INFOID:0000000001704285
Description
For checking refrigerant purity and
system contamination
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Power tool Loosening bolts and nuts
PBIC0190E
(J-44614)
Clutch disc holding tool
WHA230
Clutch disc holding tool
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REFRIGERATION SYSTEM
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REFRIGERATION SYSTEM
Refrigerant Cycle
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REFRIGERANT FLOW
The refrigerant flows in the standard pattern, that is, through the compressor, the condenser with liquid tank,
through the evaporator, and back to the compressor. The refrigerant evaporation through the evaporator is
controlled by an externally equalized expansion valve, located inside the evaporator case.
FREEZE PROTECTION
Under usual operating conditions, when the A/C is switched ON, the compressor runs continuously, and the
evaporator pressure, and temperature is controlled by the compressor to prevent freeze up.
Refrigerant System Protection
INFOID:0000000001704287
REFRIGERANT PRESSURE SENSOR
The refrigerant system is protected against excessively high or low pressures by the refrigerant pressure sensor, located on the condenser. If the system pressure rises above, or falls below the specifications, the refrigerant pressure sensor detects the pressure inside the refrigerant line and sends the voltage signal to the ECM.
ECM makes the A/C relay go OFF and stops the compressor when pressure on the high-pressure side
2
detected by refrigerant pressure sensor is over about 2,746 kPa (27.46 bar, 28.0 kg/cm
2
about 134 kPa (1.34 bar, 1.4 kg/cm
, 20 psi).
, 398 psi), or below
PRESSURE RELIEF VALVE
The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
When the pressure of refrigerant in the system increases to an unusual level [more than 3.8 MPa (38 bar,
38.76 kg/cm
erant into the atmosphere.
2
, 551 psi)], the release port on the pressure relief valve automatically opens and releases refrig-
RJIA0849E
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REFRIGERATION SYSTEM
Component Part Location
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MTC-15
< SERVICE INFORMATION >
Revision: May 2007 2008 Versa
OIL
OIL
Maintenance of Oil Quantity in Compressor
The oil in the compressor circulates through the system with the refrigerant. Add oil to compressor when
replacing any component or after a large refrigerant leakage occurred. It is important to maintain the specified
amount.
If oil quantity is not maintained properly, the following malfunctions may result:
• Lack of oil: May lead to a seized compressor.
• Excessive oil: Inadequate cooling (thermal exchange interference)
INFOID:0000000001704289
OIL
TYPE 1 Compressor (CR-10) : NISSAN A/C System Oil Type R
TYPE 2 Compressor (CSV511) : NISSAN A/C System Oil Type S
OIL RETURN OPERATION
Adjust the oil quantity according to the test group shown below.
1.CHECK OIL RETURN OPERATION
Can oil return operation be performed?
• A/C system works properly.
• There is no evidence of a large amount of oil leakage.
CAUTION:
If excessive oil leakage is noted, do not perform the oil return operation.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2.PERFORM OIL RETURN OPERATION, PROCEEDING AS FOLLOWS
1. Start engine, and set the following conditions:
- Engine speed: Idling to 1,200 rpm
- A/C blower switch: ON
- Blower speed: Max. position
- Temp. control: Optional [Set so that intake air temperature is 25° to 30°C (77° to 86° F)].
- Intake position: Recirculation (REC)
2. Perform oil return operation for about 10 minutes.
3. Stop engine.
>> GO TO 3.
3.CHECK REPLACEMENT PART
Should the compressor be replaced?
YES >> GO TO "OIL ADJUSTING PROCEDURE FOR COMPRESSOR REPLACEMENT".
NO >> GO TO "OIL ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT EXCEPT COM-
PRESSOR".
OIL ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT EXCEPT COMPRESSOR
After replacing any of the following major components, add the correct amount of oil to the system.
Amount Of Oil To Be Added
Oil to be added to system
Part replaced
Evaporator 35 (1.2, 1.2) -
Condenser 15 (0.5, 0.5) -
Liquid tank 5 (0.2, 0.2) -
Amount of oil
m (US fl oz, Imp fl oz)
Remarks
MTC-16
< SERVICE INFORMATION >
Revision: May 2007 2008 Versa
OIL
Oil to be added to system
Part replaced
In case of refrigerant leak
*1: If refrigerant leak is small, no addition of oil is needed.
Amount of oil
m (US fl oz, Imp fl oz)
30 (1.0, 1.1) Large leak
None *1
OIL ADJUSTING PROCEDURE FOR COMPRESSOR REPLACEMENT
Remarks
Small leak
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WJIA1716E
1. New compressor 2. Old compressor 3. Recovery/recycling equipment
4. Measuring cup X 5. Measuring cup Y 6. New oil
A. Drain oil from the new compressor
into clean container
D. Install new oil equal to recorded
amounts in measuring cups X plus Y
B. Record amount of oil recovered C.
Add an additional 5 m (0.2 US fl oz,
0.2 Imp fl oz) of new oil when replacing
liquid tank
1. Before connecting recovery/recycling equipment to vehicle, check recovery/recycling equipment gauges.
No refrigerant pressure should be displayed. If NG, recover refrigerant from equipment lines.
2. Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure oil discharged into the
recovery/recycling equipment.
3. Drain the oil from the old (removed) compressor into a graduated container and recover the amount of oil
drained.
4. Drain the oil from the new compressor into a separate, clean container.
5. Measure an amount of new oil installed equal to amount drained from old compressor. Add this oil to new
compressor through the suction port opening.
6. Measure an amount of new oil equal to the amount recovered during discharging. Add this oil to new compressor through the suction port opening.
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OIL
Revision: May 2007 2008 Versa
< SERVICE INFORMATION >
7. If the liquid tank also needs to be replaced, add another 5 m (0.2 US fl oz, 0.2 Imp fl oz.) of oil at this
time.
Add this 5 m (0.2 US fl oz, 0.2 Imp fl oz.) of oil only when replacing the compressor.
MTC-18
< SERVICE INFORMATION >
Revision: May 2007 2008 Versa
AIR CONDITIONER CONTROL
AIR CONDITIONER CONTROL
Control Operation
1. Intake door lever 2. Mode door control dial 3. Rear window defogger switch
4. Blower control dial 5. A/C switch (if equipped) 6. Temperature control dial
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WJIA2189E
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BLOWER CONTROL DIAL
This dial turns the fan ON and OFF, and controls fan speed.
TEMPERATURE CONTROL DIAL
This dial allows you to adjust the temperature of the discharge air.
MODE DOOR CONTROL DIAL
This dial controls the outlet air flow.
INTAKE DOOR LEVER
• Recirculation (REC) position: Interior air is recirculated inside the vehicle.
• Fresh (FRE) position: Outside air is drawn into the passenger compartment.
REAR WINDOW DEFOGGER SWITCH
When illumination is ON, rear window is defogged.
A/C SWITCH (IF EQUIPPED)
The A/C switch controls the air conditioner system. When the switch is depressed with the fan ON, the compressor will turn ON. The indicator lamp also illuminates.
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Revision: May 2007 2008 Versa
AIR CONDITIONER CONTROL
Discharge Air Flow
Mode door position
INFOID:0000000001704291
WJIA2190E
Air outlet/distribution
Vent Foot Defroster
100% — —
56% 44% —
16% 64% 20%
16% 53% 31%
17% — 83%
Airflow always present at driver and passenger side demisters
System Description
SWITCHES AND THEIR CONTROL FUNCTION
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WJIA2249E
MTC-20
AIR CONDITIONER CONTROL
Revision: May 2007 2008 Versa
< SERVICE INFORMATION >
CAN Communication System Description
WJIA2234E
INFOID:0000000001704293
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Refer to LAN-6.
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TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
CONSULT-III Function (BCM)
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
BCM diagnostic
test item
Inspection by part
DATA MONITOR
Display Item List
Monitor item name
“operation or unit”
IGN ON SW “ON/OFF”
FAN ON SIG “ON/OFF”
AIR COND SW “ON/OFF”
Diagnostic mode Description
Supports inspections and adjustments. Commands are transmitted to the BCM for
WORK SUPPORT
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.
Displays “IGN Position (ON)/OFF, ACC Position (OFF)” status as judged from ignition switch signal
through the CAN communication.
Displays “FAN (ON)/FAN (OFF)” status as judged from blower fan motor switch signal through CAN
communication.
Displays “COMP (ON)/COMP (OFF)” status as judged from air conditioner switch signal through the
CAN communication.
setting the status suitable for required operation, input/output signals are received
from the BCM and received data is displayed.
Contents
INFOID:0000000001704294
How to Perform Trouble Diagnosis for Quick and Accurate Repair
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WORK FLOW
SHA900E
*1 MTC-30, "Operational Check"
SYMPTOM TABLE
Symptom Reference Page
Air outlet does not change. Go to Trouble Diagnosis Procedure for Mode Door. MTC-31
Discharge air temperature does not
change.
Intake door does not change. Go to Trouble Diagnosis Procedure for Intake Door. MTC-33
Blower motor operation is malfunctioning. Go to Trouble Diagnosis Procedure for Blower Motor. MTC-33
Go to Trouble Diagnosis Procedure for Air Mix Door. MTC-32
MTC-22
< SERVICE INFORMATION >
Revision: May 2007 2008 Versa
TROUBLE DIAGNOSIS
Symptom Reference Page
Magnet clutch does not engage in A/C, defrost/foot, or defrost mode.
Insufficient cooling Go to Trouble Diagnosis Procedure for Insufficient Cooling. MTC-45
Insufficient heating Go to Trouble Diagnosis Procedure for Insufficient Heating. MTC-52
Noise Go to Trouble Diagnosis Procedure for Noise. MTC-53
Component Parts and Harness Connector Location
Go to Trouble Diagnosis Procedure for Magnet Clutch. MTC-37
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ENGINE COMPARTMENT
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1. Refrigerant pressure sensor E17 2. A/C compressor F3
PASSENGER COMPARTMENT
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MTC-23
< SERVICE INFORMATION >
Revision: May 2007 2008 Versa
TROUBLE DIAGNOSIS
WJIA2302E
1. Front air control M33 2. Front blower motor resistor M151 3. Thermo control amp. jumper connector (with CVT)
4. Thermo control amp. M42 (without CVT) 5. Front blower motor M62 6. Defrost A/C switch M41 (located on
back side of front air control)
MTC-24
< SERVICE INFORMATION >
Revision: May 2007 2008 Versa
TROUBLE DIAGNOSIS
Schematic
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MTC-25
< SERVICE INFORMATION >
Revision: May 2007 2008 Versa
TROUBLE DIAGNOSIS
Wiring Diagram - Heater -
WITHOUT A/C
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WJWA0485E
MTC-26
< SERVICE INFORMATION >
Revision: May 2007 2008 Versa
TROUBLE DIAGNOSIS
Wiring Diagram - A/C,M -
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