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MTC


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J AIR CONDITIONER

                                                                                                                                                              A


                                                                                                                                                              B
                                                                               SECTION
                                                                      MANUAL AIR CONDITIONER                                                                  C


                                                                                                                                                              D


                                                                                                                                                              E
                                                               CONTENTS
PRECAUTIONS ......................................................... 3
                                                                      .        AIR CONDITIONER CONTROL .............................. 21             .        F
 Precautions for Supplemental Restraint System                                  Control Operation .................................................. 21
                                                                                                                                                     .
 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-                                          FAN CONTROL KNOB ....................................... 21        .
 SIONER" ................................................................. 3
                                                                      .           MODE CONTROL KNOB ................................... 21           .        G
 Precautions for Working with HFC-134a (R-134a) 3                     .....       TEMPERATURE CONTROL KNOB ................... 21                    .
 Contaminated Refrigerant ....................................... 3   .           RECIRCULATION (REC) SWITCH .................... 21                 .
 General Refrigerant ................................................. 4
                                                                      .           AIR CONDITIONER SWITCH ............................ 21             .
                                                                                                                                                              H
 Precautions for Leak Detection Dye ........................ 4        .           REAR WINDOW DEFOGGER SWITCH ............ 21                        .
 A/C Identification Label ........................................... 4
                                                                      .         Discharge Air Flow ................................................ 22
                                                                                                                                                     .
 Precautions for Refrigerant Connection .................. 5          .        TROUBLE DIAGNOSIS ........................................... 23      .
   FEATURES OF NEW TYPE REFRIGERANT                                             How to Perform Trouble Diagnoses for Quick and                                 I
   CONNECTION ..................................................... 5 .         Accurate Repair ..................................................... 23
                                                                                                                                                     .
   O-RING AND REFRIGERANT CONNECTION..... 6                                       WORK FLOW ..................................................... 23 .
 Precautions for Servicing Compressor .................... 8          .           SYMPTOM TABLE ............................................. 23     .        MTC
 Precautions for Service Equipment ......................... 8        .         Component Location ............................................. 24  .
   RECOVERY/RECYCLING EQUIPMENT ............. 8                       .           ENGINE COMPARTMENT ................................. 24            .
   ELECTRONIC LEAK DETECTOR ....................... 8                 .           ENGINE COMPARTMENT ................................. 25            .
                                                                                                                                                              K
   VACUUM PUMP .................................................. 9   .           PASSENGER COMPARTMENT ........................ 27                  .
   MANIFOLD GAUGE SET ..................................... 9         .         Wiring Diagram -- A/C -- ...................................... 28   .
   SERVICE HOSES ................................................ 9   .         Operational Check ................................................. 30
                                                                                                                                                     .
   SERVICE COUPLERS ....................................... 10        .           CONDITIONS: .................................................... 30.        L
   CHARGING CYLINDER ..................................... 10         .           PROCEDURE: ................................................... 30  .
   THERMOMETER AND HYGROMETER ............ 10                         .         Mode Door ............................................................. 32
                                                                                                                                                     .
 Wiring Diagrams and Trouble Diagnosis ............... 10             .           TROUBLE DIAGNOSIS PROCEDURE FOR                                             M
PREPARATION .........................................................11
                                                                      .           MODE DOOR ..................................................... 32 .
 Special Service Tools .............................................11.           MODE DOOR CONTROL LINKAGE ADJUST-
 HFC-134a (R-134a) Service Tools and Equipment 12                     ...         MENT ................................................................. 33
                                                                                                                                                     .
 Commercial Service Tool ...................................... 14    .         Intake Door ............................................................ 34
                                                                                                                                                     .
REFRIGERATION SYSTEM .................................... 15          .           TROUBLE DIAGNOSIS PROCEDURE FOR
 Refrigeration Cycle ................................................ 15
                                                                      .           INTAKE DOOR ................................................... 34 .
   REFRIGERANT FLOW ...................................... 15         .           INTAKE DOOR CIRCUIT ................................... 35         .
   FREEZE PROTECTION .................................... 15          .           CONTROL LINKAGE ADJUSTMENT ................ 36                     .
   REFRIGERANT SYSTEM PROTECTION ......... 15                         .         Blower Motor ......................................................... 37
                                                                                                                                                     .
 Component Layout ................................................ 16 .           TROUBLE DIAGNOSIS PROCEDURE FOR
   FRONT ............................................................... 16
                                                                      .           BLOWER MOTOR .............................................. 37     .
   REAR ................................................................. 17
                                                                      .           BLOWER MOTOR CIRCUIT .............................. 37             .
LUBRICANT ............................................................ 18
                                                                      .           ELECTRICAL COMPONENTS INSPECTION .... 41                           .
 Maintenance of Lubricant Quantity in Compressor 18                   ...       Magnet Clutch ....................................................... 42
                                                                                                                                                     .
   LUBRICANT ....................................................... 18
                                                                      .           TROUBLE DIAGNOSIS PROCEDURE FOR
   CHECKING AND ADJUSTING .......................... 18               .           MAGNET CLUTCH ............................................ 42      .


                                                                        MTC-1
    MAGNET CLUTCH CIRCUIT ............................. 43                .           MENT ..................................................................63
                                                                                                                                                          .
    ELECTRICAL COMPONENTS INSPECTION .... 47                              .         Components ...........................................................65
                                                                                                                                                          .
  Insufficient Cooling ................................................ 49.         Removal and Installation for Compressor ..............66              .
    TROUBLE DIAGNOSIS PROCEDURE FOR                                                 Removal and Installation for Compressor Clutch ...67
    INSUFFICIENT COOLING ................................. 49             .           REMOVAL ...........................................................68
                                                                                                                                                          .
    PERFORMANCE TEST DIAGNOSIS ................ 50                        .           INSPECTION AFTER REMOVAL .......................69                  .
    PERFORMANCE CHART .................................. 52               .           INSTALLATION ...................................................69  .
    TROUBLE DIAGNOSES FOR ABNORMAL                                                    BREAK-IN OPERATION .....................................70          .
    PRESSURE ........................................................ 53  .         Thermal Protector Inspection .................................71      .
  Insufficient Heating ................................................ 56.         Removal and Installation for Evaporator ................71            .
    TROUBLE DIAGNOSIS PROCEDURE FOR                                                   REMOVAL ...........................................................71
                                                                                                                                                          .
    INSUFFICIENT HEATING .................................. 56            .           INSTALLATION ...................................................72  .
    TEMPERATURE CONTROL LINKAGE                                                     Checking for Refrigerant Leaks .............................72        .
    ADJUSTMENT ................................................... 57     .           PRELIMINARY CHECK ......................................72          .
  Noise ..................................................................... 58
                                                                          .         Fluorescent Dye Leak Detector .............................72         .
    TROUBLE DIAGNOSIS PROCEDURE FOR                                                   PRECAUTIONS FOR FLUORESCENT DYE
    NOISE ................................................................ 58
                                                                          .           LEAK DETECTION .............................................72      .
  Intake Sensor ......................................................... 59
                                                                          .           CHECKING SYSTEM FOR LEAKS USING THE
    COMPONENT DESCRIPTION ........................... 59                  .           FLUORESCENT LEAK DETECTOR ..................72                      .
    DIAGNOSTIC PROCEDURE ............................. 59                 .           DYE INJECTION .................................................72   .
    REMOVAL AND INSTALLATION ........................ 60                  .         Electronic Refrigerant Leak Detector .....................73          .
IN-CABIN MICROFILTER ........................................ 61          .           PRECAUTIONS FOR HANDLING LEAK
  Removal and Installation ....................................... 61     .           DETECTOR ........................................................73 .
    FUNCTION ......................................................... 61 .           CHECKING PROCEDURE .................................74              .
    REPLACEMENT TIMING ................................... 61             .        SERVICE DATA AND SPECIFICATIONS (SDS) .....76                          .
    REPLACEMENT PROCEDURES ...................... 61                      .         General Specifications ...........................................76  .
HEATER CORE ........................................................ 62   .           COMPRESSOR ..................................................76     .
  Removal and Installation ....................................... 62     .           LUBRICANT ........................................................76.
    REMOVAL .......................................................... 62 .           REFRIGERANT ..................................................76    .
    INSTALLATION ................................................... 62   .         Inspection and Adjustment .....................................76     .
REFRIGERANT LINES ............................................ 63         .           ENGINE IDLING SPEED (WHEN A/C IS ON) ....76                         .
  HFC-134a (R-134a) Service Procedure ................ 63                 .           BELT TENSION ..................................................76   .
    SETTING OF SERVICE TOOLS AND EQUIP-                                               MAGNET CLUTCH .............................................76       .




                                                                            MTC-2
                                              PRECAUTIONS

PRECAUTIONS                                                         PFP:00001
                                                                                                                         A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER"                                                                                           EJS001GY


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. 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              C
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:                                                                                                                 D
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.                                                                     E
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.                                                                                    F
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.
                                                                                                                         G
Precautions for Working with HFC-134a (R-134a)                                                                EJS0018L


WARNING:
q CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants H
  are mixed, compressor failure is likely to occur. Refer to MTC-3, "Contaminated Refrigerant" . To
  determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use Refrigerant
  Recovery/Recycling Recharging equipment and Refrigerant Identifier.                                 I
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- MTC
  lowing handling precautions must be observed:



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