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MTC

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MANUAL AIR CONDITIONER

J AIR CONDITIONER

SECTION
MANUAL AIR CONDITIONER
MTC B

E
CONTENTS
PRECAUTIONS ......................................................... 3
. OPERATION ....................................................... 15
. F
Precautions for Supplemental Restraint System LUBRICANT LEVEL ADJUSTMENT WHEN
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- REPLACING COMPONENTS OTHER THAN
SIONER" ................................................................. 3
. COMPRESSOR ................................................. 16 . G
Precautions for Working with HFC-134a (R-134a).... 3 . LUBRICANT LEVEL ADJUSTMENT WHEN
General Refrigerant Precautions ............................. 3 . REPLACING COMPRESSOR ............................ 16 .
Lubricant Precautions ............................................. 4
. TROUBLE DIAGNOSIS ........................................... 17 .
H
Precautions for Refrigerant Connection .................. 4 . CONSULT-II Functions .......................................... 17.
FEATURES OF NEW TYPE REFRIGERANT CONSULT-II BASIC OPERATION ...................... 17 .
CONNECTION ..................................................... 4. DATA MONITOR ................................................ 18.
O-RING AND REFRIGERANT CONNECTION..... 5 Diagnosis Procedure ............................................. 19
. I
Precautions for Servicing Compressor .................... 6 . DIAGNOSIS CHART BY SYMPTOM ................. 19 .
Precautions for Service Equipment ......................... 7 . Component Parts Location .................................... 20 .
RECOVERY/RECYCLING EQUIPMENT ............. 7 . CR ENGINE MODELS ....................................... 20 . MTC
ELECTRONIC LEAK DETECTOR ....................... 7 . HR ENGINE MODELS ....................................... 21 .
VACUUM PUMP .................................................. 7 . K9K ENGINE MODELS ...................................... 22 .
MANIFOLD GAUGE SET ..................................... 7 . Wiring Diagram --HEATER-- ............................... 23 .
K
SERVICE HOSES ................................................ 8 . Wiring Diagram --A/C-- CR Engine Models ......... 24 .
SERVICE COUPLERS ......................................... 8 . Wiring Diagram --A/C-- HR Engine Models ......... 26 .
REFRIGERANT WEIGHT SCALE ....................... 8 . Wiring Diagram --A/C-- K9K Engine Models ....... 28 .
CALIBRATING ACR4 WEIGHT SCALE ............... 8 . Wiring Diagram --PTC/H-- ................................... 30 . L
CHARGING CYLINDER ....................................... 9 . Function Inspection ............................................... 31
.
Precautions for Leak Detection Dye ........................ 9 . Blower Fan Motor System ..................................... 32 .
IDENTIFICATION ................................................. 9. INSPECTION PROCEDURE ............................. 32 . M
IDENTIFICATION LABEL FOR VEHICLE ............ 9 . Magnetic Clutch System ........................................ 34.
PREPARATION ........................................................ 10
. INSPECTION PROCEDURE ............................. 34 .
Special Service Tools ............................................ 10
. Component Inspection ........................................... 40
.
HFC-134a (R-134a) Service Tools and Equipment.. 10 . REFRIGERANT PRESSURE SENSOR ............. 40 .
REFRIGERATION SYSTEM .................................... 14 . Insufficient Cooling ................................................ 40
.
Refrigerant Cycle .................................................. 14
. CHECK FUNCTION (FOR GASOLINE ENGINE).. 40 .
REFRIGERANT FLOW ...................................... 14 . DIAGNOSIS BY PRESSURE GAUGE ............... 42 .
FREEZE PROTECTION .................................... 14 . DIAGNOSIS OF COMPRESSOR ...................... 44 .
Refrigerant System Protection .............................. 14 . Detecting Leaks With Fluorescent Indicator .......... 45 .
REFRIGERANT PRESSURE SENSOR ............ 14 . METHOD FOR DETECTING REFRIGERANT
PRESSURE RELIEF VALVE .............................. 14 . LEAKAGE ........................................................... 45
.
LUBRICANT ............................................................ 15
. CONTROL UNIT ...................................................... 46
.
Adjustment of Compressor Lubricant Amount ...... 15 . Removal and Installation ....................................... 46
.
LUBRICANT ....................................................... 15
. REMOVAL .......................................................... 46
.
PROCEDURES FOR LUBRICANT RETURN INSTALLATION .................................................. 46
.
Disassembly and Assembly ................................... 46 .

MTC-1
A/C UNIT ASSEMBLY ............................................. 48 . Removal and Installation for Compressor ..............68 .
Removal and Installation ....................................... 48 . REMOVAL ...........................................................68 .
REMOVAL .......................................................... 48
. INSTALLATION ...................................................68 .
INSTALLATION ................................................... 49. Removal and Installation for Compressor Clutch
Disassembly and Assembly ................................... 50 . (CR Engine Models) ...............................................69 .
HEATER CORE ........................................................ 52. REMOVAL ...........................................................69 .
Removal and Installation ....................................... 52 . INSTALLATION ...................................................71 .
REMOVAL .......................................................... 52
. Removal and Installation for Pipe and Hose ..........72 .
INSTALLATION ................................................... 52. REMOVAL ...........................................................72 .
BLOWER MOTOR ................................................... 53 . INSTALLATION ...................................................72 .
Removal and Installation ....................................... 53 . Removal and Installation for Refrigerant Pressure
REMOVAL .......................................................... 53
. Sensor ....................................................................73
.
INSTALLATION ................................................... 53. REMOVAL AND INSTALLATION ........................73 .
BLOWER FAN RESISTOR ...................................... 54 . Removal and Installation for Condenser (Models
Removal and Installation ....................................... 54 . without Integrated Condenser) ...............................74 .
REMOVAL .......................................................... 54
. REMOVAL ...........................................................74 .
INSTALLATION ................................................... 54. INSTALLATION ...................................................74 .
AIR CONDITIONER FILTER .................................... 55 . Removal and Installation for Condenser (Models
Removal, Replacement and Installation ................ 55 . with Integrated Condenser) ....................................74 .
REMOVAL .......................................................... 55
. REMOVAL ...........................................................74 .
REPLACEMENT ................................................. 55 . INSTALLATION ...................................................75 .
INSTALLATION ................................................... 55. RemovalandInstallationforLiquidTank(CREngine
INTAKE DOOR ......................................................... 56
. with A/T Models) ....................................................75 .
Intake Door Cable Adjustment ............................... 56 . REMOVAL ...........................................................75 .
MODE DOOR ........................................................... 57
. INSTALLATION ...................................................75 .
Mode Door Cable Adjustment ............................... 57 . RemovalandInstallationforLiquidTank(ExceptCR
AIR MIX DOOR ........................................................ 58
. Engine with A/T Models) ........................................76 .
Air Mix Door Cable Adjustment ............................. 58 . REMOVAL ...........................................................76 .
INTAKE SENSOR .................................................... 59 . INSTALLATION ...................................................76 .
Removal and Installation ....................................... 59 . Removal and Installation for Evaporator ................76 .
REMOVAL .......................................................... 59
. REMOVAL ...........................................................76 .
INSTALLATION ................................................... 59. INSTALLATION ...................................................78 .
DUCTS AND GRILLES ............................................ 60 . Removal and Installation for Expansion Valve .......78 .
Removal and Installation ....................................... 60 . REMOVAL ...........................................................78 .
COMPONENT PARTS LOCATION .................... 60 . INSTALLATION ...................................................78 .
CENTRAL VENTILATOR GRILLE ...................... 60 . Checking for Refrigerant Leaks .............................78 .
SIDE VENTILATOR GRILLE .............................. 60 . Checking System for Leaks Using the Fluorescent
DEFROSTER NOZZLE AND DUCT ................... 61 . Leak Detector .........................................................79
.
SIDE VENTILATOR DUCT ................................. 62 . Dye Injection ..........................................................79
.
CENTER VENTILATOR DUCT ........................... 63 . Electronic Refrigerant Leak Detector .....................79 .
FOOT DUCT ....................................................... 63
. PRECAUTIONS FOR HANDLING LEAK
REFRIGERANT LINES ............................................ 64 . DETECTOR ........................................................79 .
HFC-134a (R-134a) Service Procedure ................ 64 . CHECKING PROCEDURE .................................80 .
SETTING OF SERVICE TOOLS AND EQUIP- SERVICE DATA AND SPECIFICATIONS (SDS) .....82 .
MENT ................................................................. 64
. COMPRESSOR .....................................................82 .
Component Parts Location .................................... 65 . LUBRICANT ...........................................................82 .
CR ENGINE MODELS ....................................... 65 . REFRIGERANT .....................................................82 .
HR ENGINE MODELS ....................................... 66 . ENGINE IDLING SPEED .......................................82 .
K9K ENGINE MODELS ...................................... 67 . BELT TENSION .....................................................82 .

MTC-2
PRECAUTIONS

PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS004G7

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
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. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual. C
WARNING:
q 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 per-
formed by an authorized NISSAN/INFINITI dealer. D
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section. E
q 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. F
Precautions for Working with HFC-134a (R-134a) EJS002FU

WARNING: G
q Use only specified lubricant for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) compo-
nents. If lubricant other than that specified is used, compressor failure is likely to occur.
q The specified HFC-134a (R-134a) lubricant rapidly absorbs moisture from the atmosphere. The fol- H
lowing handling precautions must be observed:
q When removing refrigerant components from a vehicle, immediately cap (seal) the component to
minimize the entry of moisture from the atmosphere.
I
q 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 possi-
ble to minimize the entry of moisture into system.
q Only use the specified lubricant from a sealed container. Immediately reseal containers of lubri- MTC
cant. Without proper sealing, lubricant will become moisture saturated and should not be used.
q Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and
throat. Remove HFC-134a (R-134a) from the A/C system, using certified service equipment meet- K
ing requirements of SAE J2210 HFC-134a (R-134a) recycling equipment, or J2209 HFC-134a (R-
134a) recovery equipment). If accidental system discharge occurs, ventilate work area before
resuming service. Additional health and safety information may be obtained from refrigerant and L
lubricant manufacturers.
q Do not allow lubricant (Nissan A/C System Oil Type S or R) to come in contact with styrofoam
parts. Damage may result. M
General Refrigerant Precautions EJS002FV

WARNING:
q Do not release refrigerant into the air. Use approved recovery/recycling equipment to capture the
refrigerant every time an air conditioning system is discharged.
q Always wear eye and hand protection (goggles and gloves) when working with any refrigerant or
air conditioning system.
q Do not store or heat refrigerant containers above 52

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