Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Murano 2003-2007.2009 Approved Nissan Murano 2003 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 .
CALIBRATING ACR4 WEIGHT SCALE ............. 14 . Description of Control System ............................... 28 .
CHARGING CYLINDER ..................................... 15 . Control Operation .................................................. 28
. M
Precautions for Leak Detection Dye ...................... 15 . DISPLAY SCREEN ............................................. 29 .
IDENTIFICATION ............................................... 15 . AUTO SWITCH .................................................. 29.
IDENTIFICATION LABEL FOR VEHICLE .......... 15 . TEMPERATURE DIAL (POTENTIO TEMPERA-
Wiring Diagrams and Trouble Diagnosis ............... 15 . TURE CONTROL) (DRIVER SIDE) .................... 29 .
PREPARATION ........................................................ 16
. TEMPERATURE DIAL (POTENTIO TEMPERA-
Special Service Tools ............................................ 16
. TURE CONTROL) (PASSENGER SIDE) ........... 29 .
HFC-134a (R-134a) Service Tools and Equipment 16 ... RECIRCULATION (REC) SWITCH .................... 29 .
Commercial Service Tools ..................................... 19 . FRESH (FRE) SWITCH ..................................... 29 .
REFRIGERATION SYSTEM .................................... 20 . DEFROSTER (DEF) SWITCH ............................ 29 .
Refrigerant Cycle .................................................. 20
. REAR WINDOW DEFOGGER SWITCH ............ 29 .
REFRIGERANT FLOW ...................................... 20 . OFF SWITCH ..................................................... 29
.
FREEZE PROTECTION .................................... 20 . A/C SWITCH ...................................................... 29
.
Refrigerant System Protection .............................. 20 . MODE SWITCH ................................................. 29 .
REFRIGERANT PRESSURE SENSOR ............ 20 . FAN CONTROL DIAL ......................................... 29 .
PRESSURE RELIEF VALVE .............................. 20 . DUAL SWITCH (WITH LEFT AND RIGHT VEN-
Component Layout ................................................ 21. TILATION TEMPERATURE SEPARATELY
Revision; 2004 April ATC-1 2003 Murano
CONTROL SYSTEM) ......................................... 29 . INSPECTION FLOW ...........................................84 .
Fail-safe Function .................................................. 30
. SYSTEM DESCRIPTION ....................................85 .
Discharge Air Flow ................................................ 31 . COMPONENT DESCRIPTION ...........................86 .
System Description ................................................ 32 . DIAGNOSTIC PROCEDURE FOR MODE
SWITCHES AND THEIR CONTROL FUNCTION 32 ... DOOR MOTOR ...................................................86 .
CAN Communication System Description ............. 33 . Air Mix Door Motor Circuit ......................................87 .
CAN Communication Unit For 2WD Models .......... 33 . INSPECTION FLOW ...........................................87 .
TYPE 1/TYPE 2/TYPE 3/TYPE 4/TYPE 5/TYPE SYSTEM DESCRIPTION ....................................88 .
6/TYPE 7/TYPE 8 ............................................... 34 . COMPONENT DESCRIPTION ...........................89 .
TYPE 9/TYPE10/TYPE 11/TYPE 12/TYPE 13/ DIAGNOSTIC PROCEDURE FOR AIR MIX
TYPE 14/TYPE 15/TYPE 16 .............................. 39 . DOOR .................................................................89
.
CAN Communication Unit For AWD Models ......... 44 . Air Mix Door Motor PBR Circuit .............................89 .
TYPE 17/TYPE 18/TYPE 19/TYPE 20/TYPE 21/ DIAGNOSTIC PROCEDURE FOR AIR MIX
TYPE 22/TYPE 23/TYPE 24 .............................. 44 . DOOR PBR .........................................................89 .
TYPE 25/TYPE26/TYPE 27/TYPE 28/TYPE 29/ Intake Door Motor Circuit .......................................90 .
TYPE 30/TYPE 31/TYPE 32 .............................. 50 . INSPECTION FLOW ...........................................90 .
TROUBLE DIAGNOSIS ........................................... 55 . SYSTEM DESCRIPTION ....................................91 .
CONSULT-II ........................................................... 55
. COMPONENT DESCRIPTION ...........................92 .
CONSULT-II BASIC OPERATION ...................... 55 . DIAGNOSTIC PROCEDURE FOR INTAKE
DATA MONITOR ................................................. 56 . DOOR MOTOR ...................................................92 .
How to Perform Trouble Diagnosis for Quick and Blower Motor Circuit ...............................................93 .
Accurate Repair ..................................................... 57
. INSPECTION FLOW ...........................................93 .
WORK FLOW ..................................................... 57 . SYSTEM DESCRIPTION ....................................94 .
SYMPTOM TABLE ............................................. 57 . COMPONENT DESCRIPTION ...........................95 .
Component Parts and Harness Connector Location 58 ... DIAGNOSTIC PROCEDURE FOR BLOWER
ENGINE COMPARTMENT ................................. 58 . MOTOR ...............................................................95.
PASSENGER COMPARTMENT ......................... 59 . COMPONENT INSPECTION ..............................97 .
Schematic .............................................................. 60
. Magnet Clutch Circuit .............................................98 .
Wiring Diagram --A/C-- ........................................ 61 . INSPECTION FLOW ...........................................98 .
Auto Amp. Terminals and Reference Value ........... 66 . SYSTEM DESCRIPTION ....................................99 .
PIN CONNECTOR TERMINAL LAYOUT ........... 66 . DIAGNOSTIC PROCEDURE FOR MAGNET
TERMINALS AND REFERENCE VALUE FOR CLUTCH .............................................................99 .
UNIFIED METER AND A/C AMP. ....................... 66 . COMPONENT INSPECTION ............................ 103 .
Self-diagnosis Function ......................................... 68 . Insufficient Cooling ............................................... 104 .
DESCRIPTION ................................................... 68 . INSPECTION FLOW ......................................... 104 .
FUNCTION CONFIRMATION PROCEDURE ..... 69 . PERFORMANCE TEST DIAGNOSES ............. 105 .
AUXILIARY MECHANISM: TEMPERATURE PERFORMANCE CHART ................................. 107 .
SETTING TRIMMER .......................................... 74 . TROUBLE DIAGNOSIS FOR UNUSUAL PRES-
AUXILIARY MECHANISM: FOOT POSITION SURE ................................................................ 108
.
SETTING TRIMMER .......................................... 75 . Insufficient Heating .............................................. 111 .
AUXILIARY MECHANISM: INLET PORT MEM- INSPECTION FLOW ......................................... 111 .
ORY FUNCTION ................................................ 75 . Noise .................................................................... 112
.
Operational Check ................................................. 76 . INSPECTION FLOW ......................................... 112 .
CHECKING MEMORY FUNCTION .................... 76 . Self-diagnosis ...................................................... 113.
CHECKING BLOWER ........................................ 76 . INSPECTION FLOW ......................................... 113 .
CHECKING DISCHARGE AIR ........................... 76 . Memory Function ................................................. 114 .
CHECKING RECIRCULATION ........................... 77 . INSPECTION FLOW ......................................... 114 .
CHECKING TEMPERATURE DECREASE ........ 77 . Ambient Sensor Circuit ........................................ 115 .
CHECKING TEMPERATURE INCREASE ......... 77 . COMPONENT DESCRIPTION ......................... 115 .
CHECK A/C SWITCH ......................................... 77 . AMBIENT TEMPERATURE INPUT PROCESS . 115
CHECKING AUTO MODE .................................. 78 . DIAGNOSTIC PROCEDURE FOR AMBIENT
Power Supply and Ground Circuit for Auto Amp. ... 78 SENSOR ........................................................... 115 .
INSPECTION FLOW .......................................... 78 . COMPONENT INSPECTION ............................ 117 .
COMPONENT DESCRIPTION ........................... 79 . In-vehicle Sensor Circuit ...................................... 118 .
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 79 ... COMPONENT DESCRIPTION ......................... 118 .
LAN System Circuit ............................................... 81 . DIAGNOSTIC PROCEDURE FOR IN-VEHICLE
DIAGNOSTIC PROCEDURE FOR LAN CIR- SENSOR ........................................................... 119 .
CUIT ................................................................... 81
. COMPONENT INSPECTION ............................ 120 .
Mode Door Motor Circuit ....................................... 84 . Sunload Sensor Circuit ........................................ 121 .
Revision; 2004 April ATC-2 2003 Murano
COMPONENT DESCRIPTION ........................ 121 . MODE DOOR MOTOR ........................................... 142 .
SUNLOAD INPUT PROCESS ......................... 121 . Removal and Installation ..................................... 142 . A
DIAGNOSTIC PROCEDURE FOR SUNLOAD REMOVAL ........................................................ 142 .
SENSOR .......................................................... 121 . INSTALLATION ................................................ 142 .
COMPONENT INSPECTION ........................... 123 . AIR MIX DOOR MOTOR ........................................ 143 . B
Intake Sensor Circuit ........................................... 124 . Removal and Installation ..................................... 143 .
COMPONENT DESCRIPTION ........................ 124 . REMOVAL ........................................................ 143 .
DIAGNOSTIC PROCEDURE FOR INTAKE SEN- INSTALLATION ................................................ 143 .
SOR ................................................................. 124
. HEATER CORE ...................................................... 144 . C
COMPONENT INSPECTION ........................... 125 . Removal and Installation ..................................... 144 .
CONTROLLER ...................................................... 126 . REMOVAL ........................................................ 144 .
Removal and Installation of A/C and AV Switch .. 126 . INSTALLATION ................................................ 144 . D
REMOVAL ........................................................ 126 . DUCTS AND GRILLES .......................................... 145 .
INSTALLATION ................................................ 126 . Removal and Installation ..................................... 145 .
AUTO AMP ............................................................ 127 . REMOVAL ........................................................ 145 . E
Removal and Installation of Unified Meter and A/C INSTALLATION ................................................ 148 .
Amp. .................................................................... 127
. REFRIGERANT LINES .......................................... 149 .
REMOVAL ........................................................ 127 . HFC-134a (R-134a) Service Procedure .............. 149 .
INSTALLATION ................................................ 127 . SETTING OF SERVICE TOOLS AND EQUIP- F
AMBIENT SENSOR ............................................... 128 . MENT ............................................................... 149
.
Removal and Installation ..................................... 128 . Components ........................................................ 151 .
REMOVAL ........................................................ 128 . Removal and Installation of Compressor ............. 152 . G
INSTALLATION ................................................ 128 . REMOVAL ........................................................ 152 .
IN-VEHICLE SENSOR ........................................... 129 . INSTALLATION ................................................ 153 .
Removal and Installation ..................................... 129 . Removal and Installation of Compressor Clutch . 153 H
REMOVAL ........................................................ 129 . REMOVAL ........................................................ 153 .
INSTALLATION ................................................ 129 . INSTALLATION ................................................ 155 .
SUNLOAD SENSOR ............................................. 130 . Removal and Installation of Low-pressure Flexible
I
Removal and Installation ..................................... 130 . Hose .................................................................... 156
.
REMOVAL ........................................................ 130 . REMOVAL ........................................................ 156 .
INSTALLATION ................................................ 130 . INSTALLATION ................................................ 156 .
INTAKE SENSOR .................................................. 131 . Removal and Installation of High-pressure Flexible ATC
Removal and Installation ..................................... 131 . Hose .................................................................... 157
.
REMOVAL ........................................................ 131 . REMOVAL ........................................................ 157 .
INSTALLATION ................................................ 132 . INSTALLATION ................................................ 157 . K
BLOWER UNIT ...................................................... 133 . Removal and Installation of Low-pressure Pipe 1
Removal and Installation ..................................... 133 . (Engine Compartment) ........................................ 158 .
REMOVAL ........................................................ 133 . REMOVAL ........................................................ 158 . L
INSTALLATION ................................................ 133 . INSTALLATION ................................................ 158 .
Disassembly and Assembly ................................ 134 . Removal and Installation of High-pressure Pipe 1
BLOWER MOTOR ................................................. 135 . (Engine Compartment) ........................................ 159 .
Removal and Installation ..................................... 135 . REMOVAL ........................................................ 159 . M
REMOVAL ........................................................ 135 . INSTALLATION ................................................ 160 .
INSTALLATION ................................................ 135 . Removal and Installation of Low-pressure Pipe 2
INTAKE DOOR MOTOR ........................................ 136 . and High-pressure Pipe 2 .................................... 160 .
Removal and Installation ..................................... 136 . REMOVAL ........................................................ 160 .
REMOVAL ........................................................ 136 . INSTALLATION ................................................ 161 .
INSTALLATION ................................................ 136 . Removal and Installation of Liquid Tank .............. 162 .
IN-CABIN MICROFILTER ...................................... 137 . REMOVAL ........................................................ 162 .
Removal and Installation ..................................... 137 . INSTALLATION ................................................ 162 .
FUNCTION ....................................................... 137 . Removal and Installation of Condenser ............... 163 .
REPLACEMENT TIMING ................................. 137 . REMOVAL ........................................................ 163 .
REPLACEMENT PROCEDURES .................... 137 . INSTALLATION ................................................ 163 .
HEATER & COOLING UNIT ASSEMBLY ............. 138 . Removal and Installation of Refrigerant Pressure
Removal and Installation ..................................... 138 . Sensor ................................................................. 164
.
REMOVAL ........................................................ 138 . REMOVAL ........................................................ 164 .
INSTALLATION ................................................ 139 . INSTALLATION ................................................ 164 .
Disassembly and Assembly ................................ 140 . Removal and Installation of Evaporator ............... 164 .
REMOVAL ........................................................ 164 .
Revision; 2004 April ATC-3 2003 Murano
INSTALLATION ................................................. 165 . DETECTOR ...................................................... 167 .
Removal and Installation of Expansion Valve ...... 165 . CHECKING PROCEDURE ............................... 168 .
REMOVAL ........................................................ 165
. SERVICE DATA AND SPECIFICATIONS (SDS) ... 170 .
INSTALLATION ................................................. 165 . Compressor ......................................................... 170
.
Checking for Refrigerant Leaks ........................... 166 . Lubricant .............................................................. 170
.
Checking System for Leaks Using the Fluorescent Refrigerant ........................................................... 170
.
Leak Detector ...................................................... 166
. Engine Idling Speed ............................................. 170 .
Dye Injection ........................................................ 166
. Belt Tension ......................................................... 170
.
Electronic Refrigerant Leak Detector ................... 167 .
PRECAUTIONS FOR HANDLING LEAK
Revision; 2004 April ATC-4 2003 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 April ATC-5 2003 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 (ACR4) (J-39500-INF) 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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