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MTC

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MANUAL AIR CONDITIONER

J AIR CONDITIONER

B
SECTION
MANUAL AIR CONDITIONER C

E
CONTENTS
PRECAUTIONS ......................................................... 3
. REPLACING COMPONENTS OTHER THAN F
Precautions for Supplemental Restraint System COMPRESSOR ................................................. 16 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- LUBRICANT LEVEL ADJUSTMENT WHEN
SIONER" ................................................................. 3
. REPLACING COMPRESSOR ............................ 16 . G
Precautions for Working with HFC-134a (R-134a).... 3 . TROUBLE DIAGNOSIS ........................................... 17 .
General Refrigerant Precautions ............................. 3 . CONSULT-II Functions .......................................... 17.
Lubricant Precautions ............................................. 4
. CONSULT-II BASIC OPERATION ...................... 17 .
H
Precautions for Refrigerant Connection .................. 4 . DATA MONITOR ................................................ 18.
FEATURES OF NEW TYPE REFRIGERANT Diagnosis Procedure ............................................. 19
.
CONNECTION ..................................................... 4. DIAGNOSIS CHART BY SYMPTOM ................. 19 .
O-RING AND REFRIGERANT CONNECTION..... 5 Component Parts Location .................................... 20 . I
Precautions for Servicing Compressor .................... 6 . CR ENGINE MODELS ....................................... 20 .
Precautions for Service Equipment ......................... 6 . K9K ENGINE MODELS ...................................... 21 .
RECOVERY/RECYCLING EQUIPMENT ............. 6 . Wiring Diagram --HEATER-- ............................... 22 . MTC
ELECTRONIC LEAK DETECTOR ....................... 6 . Wiring Diagram --PTC/H-- ................................... 23 .
VACUUM PUMP .................................................. 7 . Wiring Diagram --A/C-- CR Engine Models ......... 24 .
MANIFOLD GAUGE SET ..................................... 7 . Wiring Diagram --A/C-- K9K Engine Models ....... 26 .
K
SERVICE HOSES ................................................ 7 . Function Inspection ............................................... 28
.
SERVICE COUPLERS ......................................... 8 . Blower Fan Motor System ..................................... 29 .
REFRIGERANT WEIGHT SCALE ....................... 8 . INSPECTION PROCEDURE ............................. 29 .
CALIBRATING ACR4 WEIGHT SCALE ............... 8 . Magnetic Clutch System ........................................ 31. L
CHARGING CYLINDER ....................................... 9 . INSPECTION PROCEDURE ............................. 31 .
Precautions for Leak Detection Dye ........................ 9 . Insufficient Cooling ................................................ 37
.
IDENTIFICATION ................................................. 9. CHECK FUNCTION (FOR CR ENGINE) ........... 37 . M
IDENTIFICATION LABEL FOR VEHICLE ............ 9 . DIAGNOSIS BY PRESSURE GAUGE ............... 39 .
Wiring Diagram and Trouble Diagnosis ................... 9 . DIAGNOSIS OF COMPRESSOR ...................... 41 .
PREPARATION ........................................................ 10
. Detecting Leaks With Fluorescent Indicator .......... 42 .
Special Service Tools ............................................ 10
. METHOD FOR DETECTING REFRIGERANT
HFC-134a (R-134a) Service Tools and Equipment.. 10 . LEAKAGE. .......................................................... 42
.
REFRIGERATION SYSTEM .................................... 14 . CONTROL UNIT ...................................................... 43
.
Refrigerant Cycle .................................................. 14
. Removal and Installation ....................................... 43
.
REFRIGERANT FLOW ...................................... 14 . REMOVAL .......................................................... 43
.
Refrigerant System Protection .............................. 14 . INSTALLATION .................................................. 43
.
REFRIGERANT PRESSURE SENSOR ............ 14 . Disassembly and Assembly ................................... 43 .
LUBRICANT ............................................................ 15
. A/C UNIT ASSEMBLY ............................................. 45 .
Adjustment of Compressor Lubricant Amount ...... 15 . Removal and Installation ....................................... 45
.
LUBRICANT ....................................................... 15
. REMOVAL .......................................................... 45
.
PROCEDURES FOR LUBRICANT RETURN INSTALLATION .................................................. 46
.
OPERATION ...................................................... 15
. Disassembly and Assembly ................................... 47 .
LUBRICANT LEVEL ADJUSTMENT WHEN

MTC-1
HEATER CORE ........................................................ 49. INSTALLATION ...................................................68 .
Removal and Installation ....................................... 49 . RemovalandInstallationforHigh-PressureFlexible
REMOVAL .......................................................... 49
. Hose (CR Engine Models) .....................................68 .
INSTALLATION ................................................... 49. REMOVAL ...........................................................68 .
BLOWER MOTOR ................................................... 50 . INSTALLATION ...................................................69 .
Removal and Installation ....................................... 50 . Removal and Installation for High-Pressure Pipe
REMOVAL .......................................................... 50
. (CR Engine Models) ...............................................69 .
INSTALLATION ................................................... 50. REMOVAL ...........................................................69 .
BLOWER FAN RESISTOR ...................................... 51 . INSTALLATION ...................................................70 .
Removal and Installation ....................................... 51 . Removal and Installation for Pipe and Hose (K9K
REMOVAL .......................................................... 51
. Engine Models) ......................................................70 .
INSTALLATION ................................................... 51. COMPONENTS ..................................................70 .
AIR CONDITIONER FILTER .................................... 52 . REMOVAL ...........................................................70 .
Removal, Replacement and Installation ................ 52 . INSTALLATION ...................................................71 .
REMOVAL .......................................................... 52
. Removal and Installation for Refrigerant Pressure
REPLACEMENT ................................................. 52 . Sensor ....................................................................71
.
INSTALLATION ................................................... 52. REMOVAL AND INSTALLATION ........................71 .
INTAKE DOOR ......................................................... 53
. RemovalandInstallationforCondenser(CREngine
Intake Door Cable Adjustment ............................... 53 . Models) ..................................................................71
.
MODE DOOR ........................................................... 54
. REMOVAL ...........................................................71 .
Mode Door Cable Adjustment ............................... 54 . INSTALLATION ...................................................72 .
AIR MIX DOOR ........................................................ 55
. Removal and Installation for Condenser (K9K
Air Mix Door Cable Adjustment ............................. 55 . Engine Models) ......................................................72 .
THERMO CONTROL AMPLIFIER ........................... 56 . REMOVAL ...........................................................72 .
Removal and Installation ....................................... 56 . INSTALLATION ...................................................72 .
REMOVAL .......................................................... 56
. RemovalandInstallationforLiquidTank(CREngine
INSTALLATION ................................................... 56. Models) ..................................................................73
.
DUCTS AND GRILLES ............................................ 57 . REMOVAL ...........................................................73 .
Removal and Installation ....................................... 57 . INSTALLATION ...................................................73 .
COMPONENT PARTS LOCATION .................... 57 . Removal and Installation for Liquid Tank (K9K
CENTRAL VENTILATOR GRILLE ...................... 57 . Engine Models) ......................................................74 .
SIDE VENTILATOR GRILLE .............................. 57 . REMOVAL ...........................................................74 .
DEFROSTER NOZZLE AND DUCT ................... 58 . INSTALLATION ...................................................74 .
SIDE VENTILATOR DUCT ................................. 59 . Removal and Installation for Evaporator ................74 .
CENTER VENTILATOR DUCT ........................... 60 . REMOVAL ...........................................................74 .
FOOT DUCT ....................................................... 60
. INSTALLATION ...................................................75 .
REFRIGERANT LINES ............................................ 61 . Removal and Installation for Expansion Valve .......75 .
HFC-134a (R-134a) Service Procedure ................ 61 . REMOVAL ...........................................................75 .
SETTING OF SERVICE TOOLS AND EQUIP- INSTALLATION ...................................................75 .
MENT ................................................................. 61
. Checking for Refrigerant Leaks .............................75 .
Component Parts Location .................................... 62 . Checking System for Leaks Using the Fluorescent
CR ENGINE MODELS ....................................... 62 . Leak Detector .........................................................76
.
K9K ENGINE MODELS ...................................... 62 . Dye Injection ..........................................................76
.
Removal and Installation for Compressor .............. 63 . Electronic Refrigerant Leak Detector .....................76 .
REMOVAL .......................................................... 63
. PRECAUTIONS FOR HANDLING LEAK
INSTALLATION ................................................... 64. DETECTOR ........................................................76 .
Removal and Installation for Compressor Clutch CHECKING PROCEDURE .................................77 .
(CR Engine Models) .............................................. 64 . SERVICE DATA AND SPECIFICATIONS (SDS) .....79 .
REMOVAL .......................................................... 64
. COMPRESSOR .....................................................79 .
INSTALLATION ................................................... 66. LUBRICANT ...........................................................79 .
Removal and Installation for Low-Pressure Flexible REFRIGERANT .....................................................79 .
Hose (CR Engine Models) ..................................... 67 . ENGINE IDLING SPEED .......................................79 .
REMOVAL .......................................................... 67
. BELT TENSION .....................................................79 .

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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