Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Murano 2003-2007.2009 Approved Nissan Murano 2006 atc
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AUTOMATIC AIR CONDITIONER
J AIR CONDITIONER
A
SECTION
AUTOMATIC AIR CONDITIONER
ATC B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 5
. PRESSURE RELIEF VALVE .............................. 20 . F
Precautions for Supplemental Restraint System Component Layout ................................................ 21 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- LUBRICANT ............................................................. 22
.
SIONER" ................................................................. 5
. Maintenance of Lubricant Quantity in Compressor 22 ... G
Precautions Necessary for Steering Wheel Rotation LUBRICANT ....................................................... 22 .
After Battery Disconnect ......................................... 5. LUBRICANT RETURN OPERATION ................. 22 .
OPERATION PROCEDURE ................................ 5 . LUBRICANT ADJUSTING PROCEDURE FOR
H
Precautions for Procedures without Cowl Top Cover 6 ..... COMPONENTS REPLACEMENT EXCEPT
Precautions for Working with HFC-134a (R-134a) 6 ..... COMPRESSOR ................................................. 23 .
CONTAMINATED REFRIGERANT ...................... 6 . LUBRICANT ADJUSTING PROCEDURE FOR
General Refrigerant Precautions ............................. 7 . COMPRESSOR REPLACEMENT ...................... 23 . I
Precautions for Refrigerant Connection .................. 8 . AIR CONDITIONER CONTROL .............................. 25 .
ABOUT ONE-TOUCH JOINT ............................... 8 . Description of Air Conditioner LAN Control System 25 ...
FEATURES OF NEW TYPE REFRIGERANT System Construction ............................................. 25 . ATC
CONNECTION ................................................... 10 . OPERATION ....................................................... 25 .
O-RING AND REFRIGERANT CONNECTION....11 TRANSMISSION DATA AND TRANSMISSION
Precautions for Servicing Compressor .................. 13 . ORDER .............................................................. 26
.
K
Precautions for Service Equipment ....................... 13 . AIR MIX DOOR CONTROL (AUTOMATIC TEM-
RECOVERY / RECYCLING EQUIPMENT ......... 13 . PERATURE CONTROL) .................................... 27 .
ELECTRONIC LEAK DETECTOR ..................... 13 . FAN SPEED CONTROL ..................................... 27 .
VACUUM PUMP ................................................ 13 . INTAKE DOOR CONTROL ................................ 27 . L
MANIFOLD GAUGE SET ................................... 13 . MODE DOOR CONTROL .................................. 27 .
SERVICE HOSES .............................................. 14 . MAGNET CLUTCH CONTROL .......................... 28 .
SERVICE COUPLERS ....................................... 14 . SELF-DIAGNOSIS SYSTEM ............................. 28 . M
REFRIGERANT WEIGHT SCALE ..................... 14 . Description of Control System ............................... 29 .
CHARGING CYLINDER ..................................... 14 . Control Operation .................................................. 29.
Precautions for Leak Detection Dye ...................... 15 . DISPLAY SCREEN ............................................. 30 .
IDENTIFICATION ............................................... 15 . AUTO SWITCH .................................................. 30 .
IDENTIFICATION LABEL FOR VEHICLE .......... 15 . TEMPERATURE CONTROL DIAL (POTENTIO
PREPARATION ........................................................ 16
. TEMPERATURE CONTROL) (DRIVER SIDE) ... 30
Special Service Tools ............................................ 16
. TEMPERATURE CONTROL DIAL (POTENTIO
HFC-134a (R-134a) Service Tools and Equipment 17 ... TEMPERATURE CONTROL) (PASSENGER
Commercial Service Tools ..................................... 19 . SIDE) .................................................................. 30
.
REFRIGERATION SYSTEM .................................... 20 . RECIRCULATION (REC) SWITCH .................... 30 .
Refrigerant Cycle .................................................. 20
. FRESH (FRE) SWITCH ..................................... 30 .
REFRIGERANT FLOW ...................................... 20 . DEFROSTER (DEF) SWITCH ............................ 30 .
FREEZE PROTECTION .................................... 20 . REAR WINDOW DEFOGGER SWITCH ............ 30 .
Refrigerant System Protection .............................. 20 . OFF SWITCH ..................................................... 30 .
REFRIGERANT PRESSURE SENSOR ............ 20 . A/C SWITCH ...................................................... 30 .
MODE SWITCH ................................................. 30 .
Revision: 2005 September ATC-1 2006 Murano
FAN CONTROL DIAL ......................................... 30 . Air Mix Door Motor PBR Circuit .............................69 .
DUAL SWITCH ................................................... 30 . DIAGNOSIS PROCEDURE FOR AIR MIX DOOR
Fail-safe Function .................................................. 31
. MOTOR PBR ......................................................69 .
Discharge Air Flow ................................................ 32
. Intake Door Motor Circuit .......................................70 .
System Description ................................................ 33
. INSPECTION FLOW ...........................................70 .
SWITCHES AND THEIR CONTROL FUNCTION 33 ... SYSTEM DESCRIPTION ....................................71 .
CAN Communication System Description ............. 34 . COMPONENT DESCRIPTION ...........................72 .
TROUBLE DIAGNOSIS ........................................... 35 . DIAGNOSIS PROCEDURE FOR INTAKE DOOR
CONSULT-II Function (BCM) ................................. 35 . MOTOR ...............................................................72.
CONSULT-II BASIC OPERATION ...................... 35 . Blower Motor Circuit ...............................................73 .
DATA MONITOR ................................................. 36 . INSPECTION FLOW ...........................................73 .
How to Perform Trouble Diagnosis for Quick and SYSTEM DESCRIPTION ....................................74 .
Accurate Repair ..................................................... 37
. COMPONENT DESCRIPTION ...........................75 .
WORK FLOW ..................................................... 37 . DIAGNOSIS PROCEDURE FOR BLOWER
SYMPTOM TABLE ............................................. 37 . MOTOR ...............................................................75.
Component Parts and Harness Connector Location 38 ... COMPONENT INSPECTION ..............................77 .
ENGINE COMPARTMENT ................................. 38 . Magnet Clutch Circuit .............................................78 .
PASSENGER COMPARTMENT ......................... 39 . INSPECTION FLOW ...........................................78 .
Schematic .............................................................. 40
. SYSTEM DESCRIPTION ....................................79 .
Wiring Diagram --A/C-- ........................................ 41 . DIAGNOSIS PROCEDURE FOR MAGNET
Auto Amp. Terminals and Reference Value ........... 46 . CLUTCH .............................................................79 .
PIN CONNECTOR TERMINAL LAYOUT ........... 46 . COMPONENT INSPECTION ..............................83 .
TERMINALS AND REFERENCE VALUE FOR Insufficient Cooling .................................................84 .
UNIFIED METER AND A/C AMP. ....................... 46 . INSPECTION FLOW ...........................................84 .
Self-diagnosis Function ......................................... 48 . PERFORMANCE TEST DIAGNOSIS .................86 .
DESCRIPTION ................................................... 48 . PERFORMANCE CHART ...................................88 .
FUNCTION CONFIRMATION PROCEDURE ..... 49 . TROUBLE DIAGNOSIS FOR UNUSUAL PRES-
AUXILIARY MECHANISM: TEMPERATURE SURE ..................................................................89
.
SETTING TRIMMER .......................................... 54 . Insufficient Heating ................................................92 .
AUXILIARY MECHANISM: FOOT POSITION INSPECTION FLOW ...........................................92 .
SETTING TRIMMER .......................................... 55 . Noise ......................................................................93
.
AUXILIARY MECHANISM: INLET PORT MEM- INSPECTION FLOW ...........................................93 .
ORY FUNCTION ................................................ 55 . Self-diagnosis ........................................................94.
Operational Check ................................................. 56
. INSPECTION FLOW ...........................................94 .
CHECKING MEMORY FUNCTION .................... 56 . Memory Function ...................................................95 .
CHECKING BLOWER ........................................ 56 . INSPECTION FLOW ...........................................95 .
CHECKING DISCHARGE AIR ........................... 56 . Ambient Sensor Circuit ..........................................96 .
CHECKING INTAKE AIR .................................... 56 . COMPONENT DESCRIPTION ...........................96 .
CHECKING TEMPERATURE DECREASE ........ 56 . AMBIENT TEMPERATURE INPUT PROCESS ...96
CHECKING TEMPERATURE INCREASE ......... 57 . DIAGNOSIS PROCEDURE FOR AMBIENT
CHECK A/C SWITCH ......................................... 57 . SENSOR .............................................................96 .
CHECKING AUTO MODE .................................. 57 . COMPONENT INSPECTION ..............................98 .
Power Supply and Ground Circuit for Auto Amp. ... 58 In-vehicle Sensor Circuit ........................................99 .
INSPECTION FLOW .......................................... 58 . COMPONENT DESCRIPTION ...........................99 .
COMPONENT DESCRIPTION ........................... 58 . DIAGNOSIS PROCEDURE FOR IN-VEHICLE
DIAGNOSIS PROCEDURE FOR A/C SYSTEM... 59 SENSOR ........................................................... 100 .
LAN System Circuit ............................................... 60. COMPONENT INSPECTION ............................ 101 .
DIAGNOSIS PROCEDURE FOR LAN CIRCUIT 60 ... Sunload Sensor Circuit ........................................ 102 .
Mode Door Motor Circuit ....................................... 64 . COMPONENT DESCRIPTION ......................... 102 .
INSPECTION FLOW .......................................... 64 . SUNLOAD INPUT PROCESS .......................... 102 .
SYSTEM DESCRIPTION ................................... 65 . DIAGNOSIS PROCEDURE FOR SUNLOAD
COMPONENT DESCRIPTION ........................... 66 . SENSOR ........................................................... 102 .
DIAGNOSIS PROCEDURE FOR MODE DOOR COMPONENT INSPECTION ............................ 104 .
MOTOR .............................................................. 66
. Intake Sensor Circuit ............................................ 105 .
Air Mix Door Motor Circuit ..................................... 67 . COMPONENT DESCRIPTION ......................... 105 .
INSPECTION FLOW .......................................... 67 . DIAGNOSIS PROCEDURE FOR INTAKE SEN-
SYSTEM DESCRIPTION ................................... 68 . SOR .................................................................. 105
.
COMPONENT DESCRIPTION ........................... 69 . COMPONENT INSPECTION ............................ 106 .
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR 69 ...
Revision: 2005 September ATC-2 2006 Murano
CONTROLLER ...................................................... 107 . HEATER CORE ...................................................... 125 .
Removal and Installation of A/C and AV Switch .. 107 . Removal and Installation ..................................... 125 . A
REMOVAL ........................................................ 107 . REMOVAL ........................................................ 125 .
INSTALLATION ................................................ 107 . INSTALLATION ................................................ 125 .
AUTO AMP ............................................................ 108 . DUCTS AND GRILLES .......................................... 126 . B
Removal and Installation of Unified Meter and A/C Removal and Installation ..................................... 126 .
Amp. .................................................................... 108
. REMOVAL ........................................................ 126 .
REMOVAL ........................................................ 108 . INSTALLATION ................................................ 131 .
INSTALLATION ................................................ 108 . REFRIGERANT LINES .......................................... 132 . C
AMBIENT SENSOR ............................................... 109 . HFC-134a (R-134a) Service Procedure .............. 132 .
Removal and Installation ..................................... 109 . SETTING OF SERVICE TOOLS AND EQUIP-
REMOVAL ........................................................ 109 . MENT ............................................................... 132
. D
INSTALLATION ................................................ 109 . Components ........................................................ 134 .
IN-VEHICLE SENSOR ............................................110 . Removal and Installation of Compressor ............. 135 .
Removal and Installation ......................................110 . REMOVAL ........................................................ 135 . E
REMOVAL .........................................................110 . INSTALLATION ................................................ 135 .
INSTALLATION .................................................110 . CHECK DISC TO PULLEY CLEARANCE ........ 136 .
SUNLOAD SENSOR .............................................. 111 . Removal and Installation of Low-Pressure Flexible
Removal and Installation ...................................... 111 . Hose .................................................................... 136
. F
REMOVAL ......................................................... 111 . REMOVAL ........................................................ 136 .
INSTALLATION ................................................. 111 . INSTALLATION ................................................ 136 .
INTAKE SENSOR ...................................................112 . Removal and Installation of High-Pressure Flexible G
Removal and Installation ......................................112 . Hose .................................................................... 137
.
REMOVAL .........................................................112 . REMOVAL ........................................................ 137 .
INSTALLATION .................................................112 . INSTALLATION ................................................ 137 . H
BLOWER UNIT .......................................................113 . Removal and Installation of Low-Pressure Pipe 1
Removal and Installation ......................................113 . (Engine Compartment) ........................................ 138 .
REMOVAL .........................................................113 . REMOVAL ........................................................ 138 .
I
INSTALLATION .................................................113 . INSTALLATION ................................................ 138 .
Disassembly and Assembly .................................114 . Removal and Installation of High-Pressure Pipe 1
Removal and Installation of Blower Duct .............115 . (Engine Compartment) ........................................ 139 .
REMOVAL .........................................................115 . REMOVAL ........................................................ 139 . ATC
INSTALLATION .................................................115 . INSTALLATION ................................................ 139 .
BLOWER MOTOR ..................................................116 . Removal and Installation of Low-Pressure Pipe 2
Removal and Installation ......................................116 . and High-Pressure Pipe 2 ................................... 140 . K
REMOVAL .........................................................116 . REMOVAL ........................................................ 140 .
INSTALLATION .................................................116 . INSTALLATION ................................................ 141 .
INTAKE DOOR MOTOR .........................................117 . Removal and Installation of Liquid Tank .............. 141 . L
Removal and Installation ......................................117 . REMOVAL ........................................................ 141 .
REMOVAL .........................................................117 . INSTALLATION ................................................ 142 .
INSTALLATION .................................................117 . Removal and Installation of Condenser ............... 142 .
IN-CABIN MICROFILTER .......................................118 . REMOVAL ........................................................ 142 . M
Removal and Installation ......................................118 . INSTALLATION ................................................ 143 .
FUNCTION ........................................................118 . Removal and Installation of Refrigerant Pressure
REPLACEMENT TIMING ..................................118 . Sensor ................................................................. 143
.
REPLACEMENT PROCEDURES .....................118 . REMOVAL ........................................................ 143 .
HEATER & COOLING UNIT ASSEMBLY ..............119 . INSTALLATION ................................................ 143 .
Removal and Installation ......................................119 . Removal and Installation of Evaporator ............... 143 .
REMOVAL .........................................................119 . REMOVAL ........................................................ 143 .
INSTALLATION ................................................ 120 . INSTALLATION ................................................ 144 .
Disassembly and Assembly ................................ 121 . Removal and Installation of Expansion Valve ...... 144 .
MODE DOOR MOTOR .......................................... 123 . REMOVAL ........................................................ 144 .
Removal and Installation ..................................... 123 . INSTALLATION ................................................ 144 .
REMOVAL ........................................................ 123 . Checking for Refrigerant Leaks ........................... 145 .
INSTALLATION ................................................ 123 . Checking System for Leaks Using the Fluorescent
AIR MIX DOOR MOTOR ........................................ 124 . Leak Detector ...................................................... 145.
Removal and Installation ..................................... 124 . Dye Injection ........................................................ 145
.
REMOVAL ........................................................ 124 . Electronic Refrigerant Leak Detector ................... 146 .
INSTALLATION ................................................ 124 . PRECAUTIONS FOR HANDLING LEAK
Revision: 2005 September ATC-3 2006 Murano
DETECTOR ...................................................... 146
. Lubricant .............................................................. 149
.
CHECKING PROCEDURE ............................... 147 . Refrigerant ........................................................... 149
.
SERVICE DATA AND SPECIFICATIONS (SDS) ... 149 . Engine Idling Speed ............................................. 149 .
Compressor ......................................................... 149
. Belt Tension ......................................................... 149
.
Revision: 2005 September ATC-4 2006 Murano
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" NJS000A2
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 Necessary for Steering Wheel Rotation After Battery Disconnect
NJS000CQ
NOTE: H
q This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS).
q Remove and install all control units after disconnecting both battery cables with the ignition knob in the I
LOCK position.
q Always use CONSULT-II to perform self-diagnosis as a part of each function inspection after finishing
work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
ATC
For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock
mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible. K
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE L
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged. M
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ACC position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the LOCK position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-II.
Revision: 2005 September ATC-5 2006 Murano
PRECAUTIONS
Precautions for Procedures without Cowl Top Cover NJS000CR
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
PIIB3706J
Precautions for Working with HFC-134a (R-134a) NJS000A3
CAUTION:
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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