HỆ THỐNG ĐIỀU KHIỂN HỘP SỐ CƠ TRÊN NISSAN VERSA HATCH BACK ĐỜI 2012

MTC-1
AIR CONDITIONER
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CONTENTS
MANUAL AIR CONDITIONER
SERVICE INFORMATION 3
PRECAUTIONS 3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER"
3
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect
3
Precaution for Work 4

Precaution for Procedure without Cowl Top Cover 4
Precaution for Working with HFC-134a (R-134a) 4
General Refrigerant Precaution 5
Oil Precaution 5
Precaution for Refrigerant Connection 5
Precaution for Service of Compressor 8
Precaution for Service Equipment 8
Precaution for Leak Detection Dye 10
PREPARATION 11
Special Service Tool 11
HFC-134a (R-134a) Service Tool and Equipment 11
Commercial Service Tool 14
REFRIGERATION SYSTEM 15
Refrigerant Cycle 15
Refrigerant System Protection 15
Component Part Location 16
OIL 17
Maintenance of Oil Quantity in Compressor 17
AIR CONDITIONER CONTROL 19
Control Operation 19
Discharge Air Flow 20
System Description 20
TROUBLE DIAGNOSIS 22
CONSULT Function (BCM) 22
How to Perform Trouble Diagnosis for Quick and
Accurate Repair
23
Component Parts and Harness Connector Loca-
tion
23

Schematic 26
Wiring Diagram - Heater - 27
Wiring Diagram - A/C,M - 28
Operational Check 31
Mode Door 32
Air Mix Door 33
Intake Door 34
Front Blower Motor Circuit 34
Magnet Clutch Circuit (If Equipped) 38
Insufficient Cooling 46
Insufficient Heating 53
Noise 54
CONTROLLER 56
Removal and Installation 56
Disassembly and Assembly 57
THERMO CONTROL AMPLIFIER 58
Removal and Installation 58
A/C UNIT ASSEMBLY 59
Removal and Installation 59
Disassembly and Assembly 61
BLOWER MOTOR 63
Removal and Installation 63
INTAKE DOOR 64
Intake Door Cable Adjustment 64
AIR MIX DOOR 65
Air Mix Door Cable Adjustment 65
MODE DOOR 66
Mode Door Cable Adjustment 66
BLOWER FAN RESISTOR 67
Removal and Installation 67

HEATER CORE 68
Removal and Installation 68
AIR CONDITIONER FILTER 69
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MTC-2
Changing Air Conditioner Filter 69
DUCTS AND GRILLES 70
Removal and Installation 70
REFRIGERANT LINES 75
HFC-134a (R-134a) Service Procedure 75
Component 77
Removal and Installation of Compressor 79
Removal and Installation for Compressor Clutch 80
Removal and Installation of Low-Pressure Flexi-
ble Hose
83
Removal and Installation of High-Pressure Flexi-
ble Hose
84
Removal and Installation of High-Pressure Pipe 85
Removal and Installation of Refrigerant Pressure
Sensor
86
Removal and Installation of Condenser 86
Removal and Installation of Liquid Tank 87
Removal and Installation of Evaporator 88
Removal and Installation of Expansion Valve 89
Checking of Refrigerant Leaks 89
Checking System for Leaks Using the Fluorescent
Leak Detector

89
Dye Injection 90
Electronic Refrigerant Leak Detector 90
SERVICE DATA AND SPECIFICATIONS
(SDS)
93
Compressor 93
Oil 93
Refrigerant 93
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SERVICE INFORMATION

PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000007329053
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 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 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 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.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect

INFOID:0000000007329054
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK″ position.
• Always use CONSULT to perform self-diagnosis as a part of each function inspection after finishing work. If
DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
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PRECAUTIONS
5. When the repair work is completed, return the ignition switch to the ″LOCK″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT.

Precaution for Work INFOID:0000000007795977
• 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.
• 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.
• Protect the removed parts with a shop cloth and prevent them from being dropped.
• Replace a deformed or damaged clip.
• If a part is specified as a non-reusable part, always replace it with new one.
• Be sure to tighten bolts and nuts securely to the specified torque.
• After installation is complete, be sure to check that each part works properly.
• Follow the steps below to clean components.
- 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.
- 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.
• Do not use organic solvent such as thinner, benzene, alcohol, or gasoline.
• For genuine leather seats, use a genuine leather seat cleaner.
Precaution for Procedure without Cowl Top Cover INFOID:0000000007329055
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) INFOID:0000000007329056
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 mal-
function 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 acci-
dental system discharge occurs, ventilate work area before resuming service. Additional health and
safety information may be obtained from refrigerant and oil manufacturers.
PIIB3706J
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PRECAUTIONS
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- Do not allow A/C oil to come in contact with styrofoam parts. Damage may result.
General Refrigerant Precaution INFOID:0000000007329057
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 acci-
dental 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 suf-
focation.
• Do not pressure test or leak test HFC-134a (R-134a) service equipment and/or vehicle air condition-
ing 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 manu-
facturers.
Oil Precaution INFOID:0000000007329058
• 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 con-
necting 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 seal-
ing, 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 informa-
tion 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:0000000007329059
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
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.
• The reaction force of the O-ring will not occur in the direction that causes the joint to pull out, thereby facili-
tating piping connections.
O-RING AND REFRIGERANT CONNECTION

MR18DE - TYPE 1
SHA815E
SJIA0697E
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MR18DE - TYPE 2
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.
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 installed 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.
SJIA1327E
Connection type Piping connection point QTY O-ring size
New
Condenser to high-pressure flexible hose 1 12
Condenser to high-pressure pipe 1 8
Low-pressure flexible hose to expansion valve 1 16
High-pressure pipe to expansion valve 1 8
Compressor to low-pressure flexible hose 1 19
Compressor to high-pressure flexible hose 1 12
Liquid tank to condenser pipe
Inlet 1
8
Outlet 1
Former
Refrigerant pressure sensor to condenser 1 10
Expansion valve to evaporator
Inlet 2 12
Outlet 2 16
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PRECAUTIONS
• When installing an air conditioner in the vehicle, connect the pipes as the final stage of the opera-
tion. Do not remove the seal caps of pipes and other components until just before required for con-
nection.
• 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. Be careful not to apply oil
to threaded portion. Refer to MTC-93, "
Oil".
• 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.
Precaution for Service of Compressor INFOID:0000000007329060
• 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-17, "
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:0000000007329061
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.
ELECTRONIC LEAK DETECTOR
Be certain to follow the manufacturer’s instructions for tester operation and tester maintenance.
1. Plug 2. O-ring A. Torque wrench
B. Apply oil C. Do not apply oil to thread D. NG
E. OK
WJIA1994E
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VACUUM PUMP
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 vac-
uum pump oil may migrate out of the pump into the service hose.
This is possible when the pump is switched off after evacuation (vac-
uuming) and hose is connected to it.
To prevent this migration, use a manual valve placed near the hose-
to-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 ser-
vice 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 shut-
off devices (either manual or automatic) near the end of the hoses

opposite the manifold gauge.
SERVICE COUPLERS
RHA270DA
SHA533D
RHA272D
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PRECAUTIONS
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.
REFRIGERANT WEIGHT SCALE
Verify that no refrigerant other than HFC-134a (R-134a) and speci-
fied oils have been used with the scale. If the scale controls refriger-
ant flow electronically, the hose fitting must be 1/2″-16 ACME.
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 INFOID:0000000007329062
• 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 fluo-
rescent dye leak detector should be used in conjunction with an electronic refrigerant leak detector to pin-
point 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 dur-
ing 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 HFC-
134a (R-134a) leak detection dye in CFC-12 (R-12) A/C system or CFC-12 (R-12) leak detector dye in HFC-
134a (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.
IDENTIFICATION LABEL FOR VEHICLE
Vehicles with factory installed fluorescent dye have an identification label on the front underside of the hood.
NOTE:
• Vehicles with factory installed fluorescent dye have a green label.
• Vehicles without factory installed fluorescent dye have a blue label.
Shut-off valve rotation A/C service valve
Clockwise Open
Counterclockwise Close
RHA273D
RHA274D
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Special Service Tool INFOID:0000000007742252
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
HFC-134a (R-134a) Service Tool and Equipment INFOID:0000000007329063
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

Description
—
(J-38873-A)
Drive plate installer
Installing pulley and drive plate
—
(J-44614)
Clutch disc holding tool
Clutch disc holding tool
—
(J-46534)
Trim tool set
Removing trim parts
WJIA0367E
WHA230
AWJIA0483ZZ
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PREPARATION
Tool number
(Kent-Moore No.)
Tool name
Description
HFC-134a (R-134a)
(—)
Refrigerant
Container color: Light blue
Container marking: HFC-134a (R-
134a)

Fitting size: Thread size
• large container 1/2”-16 ACME
—
(—)
NISSAN A/C System Oil Type S
Type: Poly Alkylene glycol oil (PAG),
type S
Application: HFC-134a (R-134a) vari-
able displacement swash plate com-
pressors (NISSAN only)
—
(—)
NISSAN A/C System Oil Type R
Type: Poly Alkylene glycol oil (PAG),
type R
Application: HFC-134a (R-134a) vane
rotary compressors (NISSAN only)
—
(J-48710)
NISSAN ACR2009 RRR Unit
Refrigerant recovery, recycling and re-
charging
—
(J-41995)
Electronic refrigerant leak detector
Checking for refrigerant leaks
Power supply: DC 12V (battery termi-
nal)
—
(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
Leak detection dye
Power supply: DC 12V (battery termi-
nal)
S-NT196
S-NT197
S-NT197
WJIA0293E
AHA281A
ZHA200H
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—
(J-39183-C)
Manifold gauge set (with hoses
and couplers)
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
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
Service couplers:
• (J-39500-20A)
High side coupler
• (J-39500-24A)
Low side coupler
Hose fitting to service hose:
• M14 x 1.5 fitting is optional or per-
manently attached.
—
(J-39699)
Refrigerant weight scale
For measuring of refrigerant
Fitting size - thread size:
• 1/2” - 16 ACME
—
(J-39649)
Vacuum pump
(Including the isolator valve)
Capacity:
• Air displacement: 4 CFM
• Micron rating: 20 microns
• Oil capacity: 482 g (17 oz)
Fitting size: Thread size
• 1/2”-16 ACME
Tool number

(Kent-Moore No.)
Tool name
Description
RJIA0196E
S-NT201
S-NT202
S-NT200
S-NT203
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Commercial Service Tool
INFOID:0000000007329064
—
(J-41425-NIS)
Aluminum tube repair kit
Repairing leaks in A/C tubes
—
(J-45815)
A/C disconnect tool set
For disconnecting A/C lines
Tool number
(Kent-Moore No.)
Tool name
Description
ALIIA0390ZZ
ALIIA0472ZZ
(Kent-Moore No.)
Tool name

Description
(J-41810-NI)
Refrigerant identifier equipment (R-
134a)
For checking refrigerant purity and
system contamination
Power tool Loosening bolts and nuts
RJIA0197E
PIIB1407E
Revision: July 2011 2012 Versa
REFRIGERATION SYSTEM
MTC-15
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REFRIGERATION SYSTEM

Refrigerant Cycle INFOID:0000000007329065
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:0000000007329066
REFRIGERANT PRESSURE SENSOR
The refrigerant system is protected against excessively high or low pressures by the refrigerant pressure sen-
sor, located on the condenser. If the system pressure rises above, or falls below the specifications, the refrig-
erant 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
detected by refrigerant pressure sensor is over about 2,746 kPa (27.46 bar, 28.0 kg/cm
2
, 398 psi), or below
about 134 kPa (1.34 bar, 1.4 kg/cm
2
, 20 psi).
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
2
, 551 psi)], the release port on the pressure relief valve automatically opens and releases refrig-
erant into the atmosphere.
AWIIA1499ZZ
1. Pressure relief valve 2. Compressor 3. Liquid tank
4. Refrigerant pressure sensor 5. Condenser 6. Expansion valve

7. Evaporator 8. Blower motor A. High-pressure gas
B. High-pressure liquid C. Low-pressure liquid D. Low-pressure gas
E. Outside air
Revision: July 2011 2012 Versa
MTC-16
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REFRIGERATION SYSTEM
Component Part Location
INFOID:0000000007329067
AWIIA1488ZZ
1. Side defroster duct RH 2. Side ventilator duct RH 3. Center ventilator duct RH
4. Center ventilator duct LH 5. Rear floor duct RH (if equipped) 6. Rear floor duct LH (if equipped)
7. Front floor duct (if equipped) 8. A/C unit 9. Side ventilator duct LH
10. Side defroster duct LH 11. Defroster nozzle
Revision: July 2011 2012 Versa
OIL
MTC-17
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OIL
Maintenance of Oil Quantity in Compressor INFOID:0000000007329068
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)
OIL
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
*1: If refrigerant leak is small, no addition of oil is needed.
OIL ADJUSTING PROCEDURE FOR COMPRESSOR REPLACEMENT
TYPE 1 Compressor (CR-10) : NISSAN A/C System Oil Type R
TYPE 2 Compressor (CSV511) : NISSAN A/C System Oil Type S
Part replaced
Oil to be added to system
Remarks
Amount of oil
m (US fl oz, Imp fl oz)
Evaporator 35 (1.2, 1.2) -
Condenser 15 (0.5, 0.5) -
Liquid tank 5 (0.2, 0.2) -
In case of refrigerant leak
30 (1.0, 1.1) Large leak

None *1
Small leak
*1
Revision: July 2011 2012 Versa
MTC-18
< SERVICE INFORMATION >
OIL
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 com-
pressor through the suction port opening.
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.
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
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
D. Install new oil equal to recorded

amounts in measuring cups X plus Y
WJIA1716E
Revision: July 2011 2012 Versa
AIR CONDITIONER CONTROL
MTC-19
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AIR CONDITIONER CONTROL
Control Operation INFOID:0000000007329069
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 com-
pressor will turn ON. The indicator lamp also illuminates.
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
WJIA2189E
Revision: July 2011 2012 Versa
MTC-20
< SERVICE INFORMATION >
AIR CONDITIONER CONTROL
Discharge Air Flow
INFOID:0000000007329070
System Description INFOID:0000000007329071
SWITCHES AND THEIR CONTROL FUNCTION
Mode door position
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
WJIA2190E
WJIA2249E

Revision: July 2011 2012 Versa
AIR CONDITIONER CONTROL
MTC-21
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WJIA2234E
Revision: July 2011 2012 Versa
MTC-22
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TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
CONSULT Function (BCM) INFOID:0000000007329072
CONSULT can display each diagnostic item using the diagnostic test modes shown following.
ITEMS OF EACH PART
NOTE:

CONSULT will only display systems the vehicle possesses.
BCM diagnostic
test item
Diagnostic mode Content
Inspection by part
WORK SUPPORT
Supports inspections and adjustments. Commands are transmitted to the BCM for
setting the status suitable for required operation, input/output signals are received
from the BCM and received data is displayed.
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 results 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.
System and item
CONSULT dis-
play
Diagnostic test mode (Inspection by part)
WORK
SUPPORT
SELF−
DIAG RE-
SULTS
CAN DIAG
SUPPORT
MNTR
DATA

MONITOR
ECU
PART
NUMBER
AC-
TIVE
TEST
CON-
FIGU-
RATION
BCM BCM ××× × ×
Power door lock sys-
tem
DOOR LOCK ×××
Rear defogger
REAR DEFOG-
GER
××
Warning chime BUZZER ××
Room lamp timer INT LAMP ×××
Remote keyless entry
system
MULTI REMOTE
ENT
×××
Headlamp HEAD LAMP ×××
Wiper WIPER ×××
Turn signal lamp
Hazard lamp
FLASHER ××

Blower fan switch sig-
nal
Air conditioner switch
signal
AIR CONDITION-
ER
×
Intelligent Key
INTELLIGENT
KEY
×
Combination switch COMB SW ×
NVIS (NATS) IMMU ××
Interior lamp battery
saver
BATTERY SAV-
ER
×××
Back door/Trunk TRUNK ××
Theft alarm THEFT ALARM ×××
Revision: July 2011 2012 Versa
TROUBLE DIAGNOSIS
MTC-23
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WORK SUPPORT
Display Item List
How to Perform Trouble Diagnosis for Quick and Accurate Repair INFOID:0000000007329073
WORK FLOW
SYMPTOM TABLE
Component Parts and Harness Connector Location INFOID:0000000007329074
ENGINE COMPARTMENT
Retained accessory
power control
RETAINED PWR ×××
Oil pressure switch SIGNAL BUFFER ××
Low tire pressure moni-
tor
AIR PRESSURE
MONITOR
×× × ×
Panic alarm PANIC ALARM ×
System and item
CONSULT dis-
play

Diagnostic test mode (Inspection by part)
WORK
SUPPORT
SELF−
DIAG RE-
SULTS
CAN DIAG
SUPPORT
MNTR
DATA
MONITOR
ECU
PART
NUMBER
AC-
TIVE
TEST
CON-
FIGU-
RATION
Item Description
RESET SETTING VALUE Return a value set with WORK SUPPORT of each system to a default value in factory shipment.
*1 MTC-31, "Operational Check"
SHA900E
Symptom Reference Page
Air outlet does not change. Go to Trouble Diagnosis Procedure for Mode Door. MTC-32
Discharge air temperature does not
change.
Go to Trouble Diagnosis Procedure for Air Mix Door. MTC-33
Intake door does not change. Go to Trouble Diagnosis Procedure for Intake Door. MTC-34

Blower motor operation is malfunctioning. Go to Trouble Diagnosis Procedure for Blower Motor. MTC-34
Magnet clutch does not engage in A/C, de-
frost/foot, or defrost mode.
Go to Trouble Diagnosis Procedure for Magnet Clutch. MTC-38
Insufficient cooling Go to Trouble Diagnosis Procedure for Insufficient Cooling. MTC-46
Insufficient heating Go to Trouble Diagnosis Procedure for Insufficient Heating. MTC-53
Noise Go to Trouble Diagnosis Procedure for Noise. MTC-54
Revision: July 2011 2012 Versa
MTC-24
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
PASSENGER COMPARTMENT
1. Refrigerant pressure sensor E17 (if
equipped)
2. A/C compressor F3 (if equipped)
WJIA2235E
Revision: July 2011 2012 Versa
TROUBLE DIAGNOSIS
MTC-25
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1. Front air control M33 2. Front blower motor resistor M151 3. Thermo control amp. jumper connec-
tor (with CVT), (if equipped)
4. Thermo control amp. M42 (without
CVT), (if equipped)
5. Front blower motor M62 6. Defrost A/C switch M41 (located on
back side of front air control)
WJIA2302E
Revision: July 2011 2012 Versa