Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Murano 2003-2007.2009 Approved Nissan Murano 2004 ATC
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AUTOMATIC AIR CONDITIONER
J AIR CONDITIONER
A
SECTION
AUTOMATIC AIR CONDITIONER
ATC B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 5
. LUBRICANT ............................................................. 22
. F
Precautions for Supplemental Restraint System Maintenance of Lubricant Quantity in Compressor 22 ...
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- LUBRICANT ....................................................... 22
.
SIONER" ................................................................. 5
. LUBRICANT RETURN OPERATION ................. 22 . G
Precautions for Working with HFC-134a (R-134a) 6 ..... LUBRICANT ADJUSTING PROCEDURE FOR
CONTAMINATED REFRIGERANT ...................... 6 . COMPONENTS REPLACEMENT EXCEPT
General Refrigerant Precautions ............................. 7 . COMPRESSOR ................................................. 23 .
H
Lubricant Precautions ............................................. 7
. LUBRICANT ADJUSTING PROCEDURE FOR
Precautions for Refrigerant Connection .................. 8 . COMPRESSOR REPLACEMENT ...................... 23 .
ABOUT ONE-TOUCH JOINT ............................... 8 . AIR CONDITIONER CONTROL .............................. 25 .
FEATURES OF NEW TYPE REFRIGERANT Description of Air Conditioner LAN Control System 25 ... I
CONNECTION ................................................... 10 . System Construction ............................................. 25
.
O-RING AND REFRIGERANT CONNECTION....11 OPERATION ....................................................... 25
.
Precautions for Servicing Compressor .................. 13 . TRANSMISSION DATA AND TRANSMISSION ATC
Precautions for Service Equipment ....................... 13 . ORDER .............................................................. 26
.
RECOVERY / RECYCLING EQUIPMENT ......... 13 . AIR MIX DOOR CONTROL (AUTOMATIC TEM-
ELECTRONIC LEAK DETECTOR ..................... 13 . PERATURE CONTROL) .................................... 27 .
K
VACUUM PUMP ................................................ 13 . FAN SPEED CONTROL ..................................... 27 .
MANIFOLD GAUGE SET ................................... 13 . INTAKE DOOR CONTROL ................................ 27 .
SERVICE HOSES .............................................. 14 . OUTLET DOOR CONTROL ............................... 27 .
SERVICE COUPLERS ....................................... 14 . MAGNET CLUTCH CONTROL .......................... 27 . L
REFRIGERANT WEIGHT SCALE ..................... 14 . SELF-DIAGNOSTIC SYSTEM ........................... 27 .
CHARGING CYLINDER ..................................... 14 . Description of Control System ............................... 28 .
Precautions for Leak Detection Dye ...................... 15 . Control Operation .................................................. 28
. M
IDENTIFICATION ............................................... 15 . DISPLAY SCREEN ............................................. 29 .
IDENTIFICATION LABEL FOR VEHICLE .......... 15 . AUTO SWITCH .................................................. 29.
Wiring Diagrams and Trouble Diagnosis ............... 15 . TEMPERATURE DIAL (POTENTIO TEMPERA-
PREPARATION ........................................................ 16
. TURE CONTROL) (DRIVER SIDE) .................... 29 .
Special Service Tools ............................................ 16
. TEMPERATURE DIAL (POTENTIO TEMPERA-
HFC-134a (R-134a) Service Tools and Equipment 17 ... TURE CONTROL) (PASSENGER SIDE) ........... 29 .
Commercial Service Tools ..................................... 19 . RECIRCULATION (REC) SWITCH .................... 29 .
REFRIGERATION SYSTEM .................................... 20 . FRESH (FRE) SWITCH ..................................... 29 .
Refrigerant Cycle .................................................. 20
. DEFROSTER (DEF) SWITCH ............................ 29 .
REFRIGERANT FLOW ...................................... 20 . REAR WINDOW DEFOGGER SWITCH ............ 29 .
FREEZE PROTECTION .................................... 20 . OFF SWITCH ..................................................... 29
.
Refrigerant System Protection .............................. 20 . A/C SWITCH ...................................................... 29
.
REFRIGERANT PRESSURE SENSOR ............ 20 . MODE SWITCH ................................................. 29 .
PRESSURE RELIEF VALVE .............................. 20 . FAN CONTROL DIAL ......................................... 29 .
Component Layout ................................................ 21. DUAL SWITCH (WITH LEFT AND RIGHT VEN-
TILATION TEMPERATURE SEPARATELY
Revision: 2004 November ATC-1 2004 Murano
CONTROL SYSTEM) ......................................... 29 . DOOR .................................................................69
.
Fail-Safe Function ................................................. 30. Air Mix Door Motor PBR Circuit .............................69 .
Discharge Air Flow ................................................ 31 . DIAGNOSTIC PROCEDURE FOR AIR MIX
System Description ................................................ 32 . DOOR PBR .........................................................69 .
SWITCHES AND THEIR CONTROL FUNCTION 32 ... Intake Door Motor Circuit .......................................70 .
CAN Communication System Description ............. 33 . INSPECTION FLOW ...........................................70 .
TROUBLE DIAGNOSIS ........................................... 34 . SYSTEM DESCRIPTION ....................................71 .
CONSULT-II ........................................................... 34
. COMPONENT DESCRIPTION ...........................72 .
CONSULT-II BASIC OPERATION ...................... 34 . DIAGNOSTIC PROCEDURE FOR INTAKE
DATA MONITOR ................................................. 35 . DOOR MOTOR ...................................................72 .
How to Perform Trouble Diagnosis for Quick and Blower Motor Circuit ...............................................73 .
Accurate Repair ..................................................... 36
. INSPECTION FLOW ...........................................73 .
WORK FLOW ..................................................... 36 . SYSTEM DESCRIPTION ....................................74 .
SYMPTOM TABLE ............................................. 36 . COMPONENT DESCRIPTION ...........................75 .
Component Parts and Harness Connector Location 37 ... DIAGNOSTIC PROCEDURE FOR BLOWER
ENGINE COMPARTMENT ................................. 37 . MOTOR ...............................................................75.
PASSENGER COMPARTMENT ......................... 38 . COMPONENT INSPECTION ..............................77 .
Schematic .............................................................. 39
. Magnet Clutch Circuit .............................................78 .
Wiring Diagram --A/C-- ........................................ 40 . INSPECTION FLOW ...........................................78 .
Auto Amp. Terminals and Reference Value ........... 45 . SYSTEM DESCRIPTION ....................................79 .
PIN CONNECTOR TERMINAL LAYOUT ........... 45 . DIAGNOSTIC PROCEDURE FOR MAGNET
TERMINALS AND REFERENCE VALUE FOR CLUTCH .............................................................79 .
UNIFIED METER AND A/C AMP. ....................... 45 . COMPONENT INSPECTION ..............................83 .
Self-Diagnosis Function ......................................... 47 . Insufficient Cooling .................................................84 .
DESCRIPTION ................................................... 47 . INSPECTION FLOW ...........................................84 .
FUNCTION CONFIRMATION PROCEDURE ..... 48 . PERFORMANCE TEST DIAGNOSIS .................86 .
AUXILIARY MECHANISM: TEMPERATURE PERFORMANCE CHART ...................................88 .
SETTING TRIMMER .......................................... 53 . TROUBLE DIAGNOSIS FOR UNUSUAL PRES-
AUXILIARY MECHANISM: FOOT POSITION SURE ..................................................................89
.
SETTING TRIMMER .......................................... 54 . Insufficient Heating ................................................92 .
AUXILIARY MECHANISM: INLET PORT MEM- INSPECTION FLOW ...........................................92 .
ORY FUNCTION ................................................ 54 . Noise ......................................................................93
.
Operational Check ................................................. 55 . INSPECTION FLOW ...........................................93 .
CHECKING MEMORY FUNCTION .................... 55 . Self-diagnosis ........................................................94.
CHECKING BLOWER ........................................ 55 . INSPECTION FLOW ...........................................94 .
CHECKING DISCHARGE AIR ........................... 55 . Memory Function ...................................................95 .
CHECKING RECIRCULATION ........................... 56 . INSPECTION FLOW ...........................................95 .
CHECKING TEMPERATURE DECREASE ........ 56 . Ambient Sensor Circuit ..........................................96 .
CHECKING TEMPERATURE INCREASE ......... 56 . COMPONENT DESCRIPTION ...........................96 .
CHECK A/C SWITCH ......................................... 56 . AMBIENT TEMPERATURE INPUT PROCESS ...96
CHECKING AUTO MODE .................................. 57 . DIAGNOSTIC PROCEDURE FOR AMBIENT
Power Supply and Ground Circuit for Auto Amp. ... 57 SENSOR .............................................................96 .
INSPECTION FLOW .......................................... 57 . COMPONENT INSPECTION ..............................98 .
COMPONENT DESCRIPTION ........................... 58 . In-Vehicle Sensor Circuit ........................................99 .
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 58 ... COMPONENT DESCRIPTION ...........................99 .
LAN System Circuit ............................................... 60 . DIAGNOSTIC PROCEDURE FOR IN-VEHICLE
DIAGNOSTIC PROCEDURE FOR LAN CIR- SENSOR ........................................................... 100 .
CUIT ................................................................... 60
. COMPONENT INSPECTION ............................ 101 .
Mode Door Motor Circuit ....................................... 64 . Sunload Sensor Circuit ........................................ 102 .
INSPECTION FLOW .......................................... 64 . COMPONENT DESCRIPTION ......................... 102 .
SYSTEM DESCRIPTION ................................... 65 . SUNLOAD INPUT PROCESS .......................... 102 .
COMPONENT DESCRIPTION ........................... 66 . DIAGNOSTIC PROCEDURE FOR SUNLOAD
DIAGNOSTIC PROCEDURE FOR MODE SENSOR ........................................................... 102 .
DOOR MOTOR .................................................. 66 . COMPONENT INSPECTION ............................ 104 .
Air Mix Door Motor Circuit ..................................... 67 . Intake Sensor Circuit ............................................ 105 .
INSPECTION FLOW .......................................... 67 . COMPONENT DESCRIPTION ......................... 105 .
SYSTEM DESCRIPTION ................................... 68 . DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
COMPONENT DESCRIPTION ........................... 69 . SOR .................................................................. 105
.
DIAGNOSTIC PROCEDURE FOR AIR MIX COMPONENT INSPECTION ............................ 106 .
Revision: 2004 November ATC-2 2004 Murano
CONTROLLER ...................................................... 107 . HEATER CORE ...................................................... 124 .
Removal and Installation of A/C and AV Switch .. 107 . Removal and Installation ..................................... 124 . A
REMOVAL ........................................................ 107 . REMOVAL ........................................................ 124 .
INSTALLATION ................................................ 107 . INSTALLATION ................................................ 124 .
AUTO AMP ............................................................ 108 . DUCTS AND GRILLES .......................................... 125 . B
Removal and Installation of Unified Meter and A/C Removal and Installation ..................................... 125 .
Amp. .................................................................... 108
. REMOVAL ........................................................ 125 .
REMOVAL ........................................................ 108 . INSTALLATION ................................................ 128 .
INSTALLATION ................................................ 108 . REFRIGERANT LINES .......................................... 129 . C
AMBIENT SENSOR ............................................... 109 . HFC-134a (R-134a) Service Procedure .............. 129 .
Removal and Installation ..................................... 109 . SETTING OF SERVICE TOOLS AND EQUIP-
REMOVAL ........................................................ 109 . MENT ............................................................... 129
. D
INSTALLATION ................................................ 109 . Components ........................................................ 131 .
IN-VEHICLE SENSOR ............................................110 . Removal and Installation of Compressor ............. 132 .
Removal and Installation ......................................110 . REMOVAL ........................................................ 132 . E
REMOVAL .........................................................110 . INSTALLATION ................................................ 133 .
INSTALLATION .................................................110 . Removal and Installation of Compressor Clutch . 133
SUNLOAD SENSOR .............................................. 111 . REMOVAL ........................................................ 133 .
Removal and Installation ...................................... 111 . INSTALLATION ................................................ 134 . F
REMOVAL ......................................................... 111 . Removal and Installation of Low-Pressure Flexible
INSTALLATION ................................................. 111 . Hose .................................................................... 136
.
INTAKE SENSOR ...................................................112 . REMOVAL ........................................................ 136 . G
Removal and Installation ......................................112 . INSTALLATION ................................................ 136 .
REMOVAL .........................................................112 . Removal and Installation of High-Pressure Flexible
INSTALLATION .................................................112 . Hose .................................................................... 137
. H
BLOWER UNIT .......................................................113 . REMOVAL ........................................................ 137 .
Removal and Installation ......................................113 . INSTALLATION ................................................ 137 .
REMOVAL .........................................................113 . Removal and Installation of Low-Pressure Pipe 1
I
INSTALLATION .................................................113 . (Engine Compartment) ........................................ 138 .
Disassembly and Assembly .................................114 . REMOVAL ........................................................ 138 .
BLOWER MOTOR ..................................................115 . INSTALLATION ................................................ 138 .
Removal and Installation ......................................115 . Removal and Installation of High-Pressure Pipe 1 ATC
REMOVAL .........................................................115 . (Engine Compartment) ........................................ 139 .
INSTALLATION .................................................115 . REMOVAL ........................................................ 139 .
INTAKE DOOR MOTOR .........................................116 . INSTALLATION ................................................ 140 . K
Removal and Installation ......................................116 . Removal and Installation of Low-Pressure Pipe 2
REMOVAL .........................................................116 . and High-Pressure Pipe 2 ................................... 140 .
INSTALLATION .................................................116 . REMOVAL ........................................................ 140 . L
IN-CABIN MICROFILTER .......................................117 . INSTALLATION ................................................ 141 .
Removal and Installation ......................................117 . Removal and Installation of Liquid Tank .............. 142 .
FUNCTION ........................................................117 . REMOVAL ........................................................ 142 .
REPLACEMENT TIMING ..................................117 . INSTALLATION ................................................ 142 . M
REPLACEMENT PROCEDURES .....................117 . Removal and Installation of Condenser ............... 143 .
HEATER & COOLING UNIT ASSEMBLY ..............118 . REMOVAL ........................................................ 143 .
Removal and Installation ......................................118 . INSTALLATION ................................................ 143 .
REMOVAL .........................................................118 . Removal and Installation of Refrigerant Pressure
INSTALLATION .................................................119 . Sensor ................................................................. 144
.
Disassembly and Assembly ................................ 120 . REMOVAL ........................................................ 144 .
MODE DOOR MOTOR .......................................... 122 . INSTALLATION ................................................ 144 .
Removal and Installation ..................................... 122 . Removal and Installation of Evaporator ............... 144 .
REMOVAL ........................................................ 122 . REMOVAL ........................................................ 144 .
INSTALLATION ................................................ 122 . INSTALLATION ................................................ 145 .
AIR MIX DOOR MOTOR ........................................ 123 . Removal and Installation of Expansion Valve ...... 145 .
Removal and Installation ..................................... 123 . REMOVAL ........................................................ 145 .
REMOVAL ........................................................ 123 . INSTALLATION ................................................ 145 .
INSTALLATION ................................................ 123 . Checking for Refrigerant Leaks ........................... 146 .
Checking System for Leaks Using the Fluorescent
Leak Detector ...................................................... 146.
Revision: 2004 November ATC-3 2004 Murano
Dye Injection ........................................................ 146
. Compressor ......................................................... 150
.
Electronic Refrigerant Leak Detector ................... 147 . Lubricant .............................................................. 150
.
PRECAUTIONS FOR HANDLING LEAK Refrigerant ........................................................... 150
.
DETECTOR ...................................................... 147. Engine Idling Speed ............................................. 150 .
CHECKING PROCEDURE ............................... 148 . Belt Tension ......................................................... 150
.
SERVICE DATA AND SPECIFICATIONS (SDS) ... 150 .
Revision: 2004 November ATC-4 2004 Murano
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" AJS001BL
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
H
I
ATC
K
L
M
Revision: 2004 November ATC-5 2004 Murano
PRECAUTIONS
Precautions for Working with HFC-134a (R-134a) AJS000Y8
WARNING:
q CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants
are mixed and compressor malfunction is likely to occur, refer to "CONTAMINATED REFRIGER-
ANT" below. To determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use
Refrigerant Recovery/Recycling Recharging equipment and Refrigerant Identifier.
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 malfunction is likely to occur.
q The specified HFC-134a (R-134a) lubricant rapidly absorbs moisture from the atmosphere. The fol-
lowing handling precautions must be observed:
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