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J AIR CONDITIONER

                                                                                                                                                                          A




                                                                                     SECTION
                                                                            MANUAL AIR CONDITIONER
                                                                                                                 MTC                                                      B



                                                                                                                                                                          C



                                                                                                                                                                          D



                                                                                                                                                                          E
                                                                    CONTENTS
PRECAUTIONS ......................................................... 4     .         Description ............................................................. 22
                                                                                                                                                                 .        F
 Precautions for Supplemental Restraint System                                        Operation ............................................................... 22
                                                                                                                                                                 .
 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-                                                AIR MIX DOOR CONTROL ................................ 22                 .
 SIONER" ................................................................. 4.           BLOWER SPEED CONTROL ............................ 22                     .        G
 Precautions for Working with HFC-134a (R-134a) 4                           .....       INTAKE DOORS CONTROL .............................. 22                   .
 Contaminated Refrigerant ....................................... 4         .           MODE DOOR CONTROL .................................. 22                  .
 General Refrigerant Precautions ............................. 5            .           DEFROSTER DOOR CONTROL ....................... 22                        .
                                                                                                                                                                          H
 Precautions for Leak Detection Dye ........................ 5              .           MAGNET CLUTCH CONTROL .......................... 22                      .
 A/C Identification Label ........................................... 5     .         Description of Control System ............................... 24           .
 Precautions for Refrigerant Connection .................. 5                .         Control Operation .................................................. 25    .
   FEATURES OF NEW TYPE REFRIGERANT                                                     TEMPERATURE CONTROL DIAL (TEMPERA-                                                 I
   CONNECTION ..................................................... 6       .           TURE CONTROL) .............................................. 25          .
   O-RING AND REFRIGERANT CONNECTION ..... 7                                            RECIRCULATION () SWITCH ............................ 25                  .
 Precautions for Servicing Compressor .................... 9                .           DEFROSTER SWITCH ...................................... 25               .        MTC
 Precautions for Service Equipment ......................... 9              .           REAR WINDOW DEFOGGER SWITCH ............ 25                              .
   RECOVERY/RECYCLING EQUIPMENT ............. 9                             .           OFF SWITCH (BLOWER SPEED SET TO 0) .... 25                               .
   ELECTRONIC LEAK DETECTOR ....................... 9                       .           A/C SWITCH ...................................................... 25     .
                                                                                                                                                                          K
   VACUUM PUMP ................................................ 10          .           MODE DIAL ........................................................ 25    .
   MANIFOLD GAUGE SET ................................... 10                .           BLOWER CONTROL DIAL ................................ 25                  .
   SERVICE HOSES .............................................. 10          .         Discharge Air Flow ................................................ 26     .
   SERVICE COUPLERS ........................................11              .            ........................................................................... 26
                                                                                                                                                                 .        L
   REFRIGERANT WEIGHT SCALE ......................11                        .         System Description ................................................ 27     .
   CHARGING CYLINDER ......................................11               .           SWITCHES AND THEIR CONTROL FUNCTION 27                                   ...
PREPARATION ........................................................ 12     .        TROUBLE DIAGNOSIS ........................................... 28            .        M
 Special Service Tools ............................................ 12      .         CONSULT-II Function (BCM) ................................ 28              .
 HFC-134a (R-134a) Service Tools and Equipment 12                           ...         CONSULT-II BASIC OPERATION ...................... 28                     .
 Commercial Service Tools ..................................... 15          .           DATA MONITOR ................................................ 29         .
REFRIGERATION SYSTEM .................................... 16                .         How to Perform Trouble Diagnosis for Quick and
 Refrigerant Cycle .................................................. 16    .         Accurate Repair ..................................................... 30   .
   REFRIGERANT FLOW ...................................... 16               .           WORK FLOW ..................................................... 30       .
   FREEZE PROTECTION .................................... 16                .           SYMPTOM TABLE ............................................. 30           .
 Refrigerant System Protection .............................. 16            .         Component Parts and Harness Connector Location 31                          ...
   REFRIGERANT PRESSURE SENSOR ............ 16                              .           ENGINE COMPARTMENT ................................. 31                  .
   PRESSURE RELIEF VALVE .............................. 16                  .           PASSENGER COMPARTMENT ........................ 32                        .
 Component Layout ................................................ 17       .         Schematic .............................................................. 33.
OIL ........................................................................... 19
                                                                            .         Wiring Diagram -- A/C,M -- .................................. 34           .
 Maintenance of Oil Quantity in Compressor ......... 19                     .         Front Air Control Terminals and Reference Value... 37
   OIL ..................................................................... 19
                                                                            .           PIN CONNECTOR TERMINAL LAYOUT ........... 37                             .
   CHECKING AND ADJUSTING .......................... 19                     .           TERMINALS AND REFERENCE VALUE FOR
AIR CONDITIONER CONTROL .............................. 22                   .           FRONT AIR CONTROL ..................................... 37               .


Revision: September 2005                                                      MTC-1                                                                   2006 Xterra
 Operational Check ................................................. 38      .        CONTROL UNIT .......................................................79  .
   CHECKING BLOWER ........................................ 38               .          Removal and Installation ........................................79   .
   CHECKING DISCHARGE AIR ........................... 38                     .            FRONT AIR CONTROL ......................................79          .
   DISCHARGE AIR FLOW .................................... 38                .        INTAKE SENSOR .....................................................80   .
   CHECKING TEMPERATURE DECREASE ........ 38                                 .          Removal and Installation ........................................80   .
   CHECKING TEMPERATURE INCREASE ......... 38                                .            REMOVAL ...........................................................80
                                                                                                                                                              .
   CHECK A/C SWITCH ......................................... 38             .            INSTALLATION ...................................................80  .
 Power Supply and Ground Circuit for Front Air Con-                                   BLOWER MOTOR ....................................................81     .
 trol .......................................................................... 40
                                                                             .          Components ...........................................................81
                                                                                                                                                              .
   INSPECTION FLOW .......................................... 40             .          Removal and Installation ........................................81   .
   COMPONENT DESCRIPTION ........................... 41                      .            REMOVAL ...........................................................81
                                                                                                                                                              .
   DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 41                                    ...          INSTALLATION ...................................................81  .
 Mode Door Motor Circuit ....................................... 43          .        IN-CABIN MICROFILTER .........................................82        .
   INSPECTION FLOW .......................................... 43             .          Removal and Installation ........................................82   .
   SYSTEM DESCRIPTION ................................... 44                 .            FUNCTION .........................................................82.
   COMPONENT DESCRIPTION ........................... 44                      .            REPLACEMENT TIMING ...................................82            .
   DIAGNOSTIC PROCEDURE FOR MODE                                                          REPLACEMENT PROCEDURE .........................82                   .
   DOOR MOTOR .................................................. 45          .        HEATER & COOLING UNIT ASSEMBLY ................84                       .
 Air Mix Door Motor (Front) Circuit .......................... 47            .          Components ...........................................................84
                                                                                                                                                              .
   INSPECTION FLOW .......................................... 47             .          Removal and Installation ........................................84   .
   SYSTEM DESCRIPTION ................................... 48                 .            REMOVAL ...........................................................84
                                                                                                                                                              .
   COMPONENT DESCRIPTION ........................... 48                      .            INSTALLATION ...................................................85  .
   DIAGNOSTIC PROCEDURE FOR AIR MIX                                                   HEATER CORE ........................................................86  .
   DOOR MOTOR (FRONT) ................................... 49                 .          Components ...........................................................86
                                                                                                                                                              .
 Intake Door Motor Circuit ....................................... 51        .          Removal and Installation ........................................86   .
   INSPECTION FLOW .......................................... 51             .            REMOVAL ...........................................................86
                                                                                                                                                              .
   SYSTEM DESCRIPTION ................................... 52                 .            INSTALLATION ...................................................86  .
   COMPONENT DESCRIPTION ........................... 52                      .        INTAKE DOOR MOTOR ...........................................87         .
   DIAGNOSTIC PROCEDURE FOR INTAKE                                                      Removal and Installation ........................................87   .
   DOOR MOTOR .................................................. 53          .            REMOVAL ...........................................................87
                                                                                                                                                              .
 Front Blower Motor Circuit ..................................... 55         .            INSTALLATION ...................................................87  .
   INSPECTION FLOW .......................................... 55             .        MODE DOOR MOTOR .............................................88         .
   SYSTEM DESCRIPTION ................................... 56                 .          Removal and Installation ........................................88   .
   COMPONENT DESCRIPTION ........................... 56                      .            REMOVAL ...........................................................88
                                                                                                                                                              .
   DIAGNOSTIC PROCEDURE FOR BLOWER                                                        INSTALLATION ...................................................88  .
   MOTOR .............................................................. 57   .        AIR MIX DOOR MOTOR ..........................................89         .
   COMPONENT INSPECTION ............................. 61                     .          Components ...........................................................89
                                                                                                                                                              .
 Magnet Clutch Circuit ............................................ 63       .          Removal and Installation ........................................89   .
   INSPECTION FLOW .......................................... 63             .            REMOVAL ...........................................................89
                                                                                                                                                              .
   SYSTEM DESCRIPTION ................................... 64                 .            INSTALLATION ...................................................89  .
   DIAGNOSTIC PROCEDURE FOR MAGNET                                                    FRONT BLOWER MOTOR RESISTOR ...................90                       .
   CLUTCH ............................................................. 64   .          Removal and Installation ........................................90   .
 Insufficient Cooling ................................................ 68    .            REMOVAL ...........................................................90
                                                                                                                                                              .
   INSPECTION FLOW .......................................... 68             .            INSTALLATION ...................................................90  .
   PERFORMANCE TEST DIAGNOSES ............... 69                             .        DUCTS AND GRILLES ............................................91        .
   PERFORMANCE CHART .................................. 71                   .          Components ...........................................................91
                                                                                                                                                              .
   TROUBLE DIAGNOSES FOR UNUSUAL PRES-                                                  Removal and Installation ........................................92   .
   SURE .................................................................. 72.            DEFROSTER NOZZLE .......................................92          .
 Insufficient Heating ................................................ 75    .            RH AND LH SIDE DEMISTER DUCTS ..............93                      .
   INSPECTION FLOW .......................................... 75             .            RH AND LH VENTILATOR DUCTS ....................93                   .
 Noise ..................................................................... 76
                                                                             .            CENTER VENTILATOR DUCT ...........................93                .
   INSPECTION FLOW .......................................... 76             .            FLOOR CONNECTOR DUCT ............................93                 .
 Intake Sensor Circuit ............................................. 77      .            FRONT AND REAR FLOOR DUCTS .................93                      .
   COMPONENT DESCRIPTION ........................... 77                      .            GRILLES .............................................................93
                                                                                                                                                              .
   DIAGNOSTIC PROCEDURE FOR INTAKE SEN-                                               REFRIGERANT LINES ............................................94        .
   SOR .................................................................... 77
                                                                             .          HFC-134a (R-134a) Service Procedure .................94               .
   COMPONENT INSPECTION ............................. 78                     .            SETTING OF SERVICE TOOLS AND EQUIP-
                                                                                          MENT ..................................................................94
                                                                                                                                                              .
                                                                                        Components ...........................................................96
                                                                                                                                                              .

Revision: September 2005                                                       MTC-2                                                               2006 Xterra
  Removal and Installation for Compressor ............. 97                 .          REMOVAL ........................................................ 102   .
    COMPONENTS ................................................. 97        .          INSTALLATION ................................................ 102      .       A
    REMOVAL .......................................................... 97  .        Removal and Installation for Condenser ............. 102                 .
    INSTALLATION .................................................. 97     .          REMOVAL ........................................................ 102   .
  Removal and Installation for Compressor Clutch ... 98                               INSTALLATION ................................................ 103      .       B
    REMOVAL .......................................................... 98  .        Removal and Installation for Evaporator ............. 104                .
    INSPECTION ..................................................... 99    .          REMOVAL ........................................................ 105   .
    INSTALLATION .................................................. 99     .          INSTALLATION ................................................ 105      .
    BREAK-IN OPERATION .................................. 101              .        Removal and Installation for Expansion Valve ..... 105                   .       C
  Removal and Installation for High-pressure Flexible                                 REMOVAL ........................................................ 105   .
  A/C Hose ............................................................. 101
                                                                           .          INSTALLATION ................................................ 105      .
    REMOVAL ........................................................ 101   .        Checking for Refrigerant Leaks ........................... 105           .       D
    INSTALLATION ................................................ 101      .        Checking System for Leaks Using the Fluorescent
  Removal and Installation for High-pressure A/C                                    Dye Leak Detector ............................................... 105    .
  Pipe ..................................................................... 101
                                                                           .        Dye Injection ........................................................ 106
                                                                                                                                                             .       E
    REMOVAL ........................................................ 101   .        Electronic Refrigerant Leak Detector ................... 106             .
    INSTALLATION ................................................ 101      .          PRECAUTIONS FOR HANDLING LEAK
  Removal and Installation for Low-pressure Flexible                                  DETECTOR ...................................................... 106    .
  A/C Hose ............................................................. 101
                                                                           .          CHECKING PROCEDURE .............................. 107                  .       F
    REMOVAL ........................................................ 101   .       SERVICE DATA AND SPECIFICATIONS (SDS) ... 109                             .
    INSTALLATION ................................................ 101      .        Service Data and Specifications (SDS) ............... 109                .
  Removal and Installation for Low-pressure A/C Pipe 102                   .          COMPRESSOR ............................................... 109         .       G
    REMOVAL ........................................................ 102   .          OIL .................................................................... 109
                                                                                                                                                             .
    INSTALLATION ................................................ 102      .          REFRIGERANT ................................................ 109       .
  Removal and Installation for Refrigerant Pressure                                   ENGINE IDLING SPEED ................................. 109              .       H
  Sensor ................................................................. 102
                                                                           .          BELT TENSION ................................................ 109      .


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                                                                                                                                                                     MTC



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                                                                                                                                                                     L



                                                                                                                                                                     M




Revision: September 2005                                                    MTC-3                                                                2006 Xterra
                                              PRECAUTIONS

PRECAUTIONS                                                         PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER"                                                                                           EJS0043X


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:
G    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.
G    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.
G    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.
Precautions for Working with HFC-134a (R-134a)                                                                EJS0043Y


WARNING:
G CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants
  are mixed compressor failure is likely to occur. Refer to MTC-4, "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.
G 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 failure is likely to occur.
G The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following
  handling precautions must be observed:



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