Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Quest 2004-2009 Approved Nissan Quest 2004 MTC
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J AIR CONDITIONER
A
B
SECTION
MANUAL AIR CONDITIONER 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
. CHECKING AND ADJUSTING ........................... 22 . G
Precautions for Working with HFC-134a (R-134a) 5 ..... AIR CONDITIONER CONTROL .............................. 24 .
Contaminated Refrigerant ....................................... 5 . Description ............................................................. 24
.
General Refrigerant Precautions ............................. 6 . Operation ............................................................... 24
.
H
Precautions for Leak Detection Dye ........................ 6 . AIR MIX DOOR CONTROL ................................ 24 .
A/C Identification Label ........................................... 7
. BLOWER SPEED CONTROL ............................ 24 .
Precautions for Refrigerant Connection .................. 7 . INTAKE DOORS CONTROL .............................. 24 .
FEATURES OF NEW TYPE REFRIGERANT MODE DOOR CONTROL .................................. 24 . I
CONNECTION ..................................................... 7. DEFROSTER DOOR CONTROL ....................... 24 .
O-RING AND REFRIGERANT CONNECTION..... 8 MAGNET CLUTCH CONTROL .......................... 25 .
Precautions for Servicing Compressor ...................11 . SELF-DIAGNOSTIC SYSTEM ........................... 25 . MTC
Precautions for Service Equipment ........................11 . Description of Control System ............................... 26 .
RECOVERY/RECYCLING EQUIPMENT ............11 . Control Operation .................................................. 26
.
ELECTRONIC LEAK DETECTOR ......................11 . DISPLAY SCREEN ............................................. 27 .
K
VACUUM PUMP ................................................ 12 . TEMPERATURE DIAL (TEMPERATURE CON-
MANIFOLD GAUGE SET ................................... 12 . TROL) (FRONT) ................................................. 27 .
SERVICE HOSES .............................................. 12 . TEMPERATURE DIAL (TEMPERATURE CON-
SERVICE COUPLERS ....................................... 13 . TROL) (REAR) ................................................... 27 . L
REFRIGERANT WEIGHT SCALE ..................... 13 . RECIRCULATION () SWITCH ............................ 27 .
CHARGING CYLINDER ..................................... 13 . REAR WINDOW DEFOGGER SWITCH ............ 27 .
Wiring Diagrams and Trouble Diagnosis ............... 13 . OFF DIAL (BLOWER SPEED SET TO 0) .......... 27 . M
PREPARATION ........................................................ 14
. A/C SWITCH ...................................................... 27.
Special Service Tools ............................................ 14
. MODE DIAL ........................................................ 27
.
HFC-134a (R-134a) Service Tools and Equipment 14 ... FRONT BLOWER CONTROL DIAL ................... 27 .
Commercial Service Tools ..................................... 16 . REAR BLOWER CONTROL DIAL ..................... 27 .
REFRIGERATION SYSTEM .................................... 18 . Discharge Air Flow ................................................ 28.
Refrigerant Cycle .................................................. 18
. FRONT ............................................................... 28
.
REFRIGERANT FLOW ...................................... 18 . REAR ................................................................. 28
.
Refrigerant System Protection .............................. 18 . System Description ................................................ 29.
REFRIGERANT PRESSURE SENSOR ............ 18 . SWITCHES AND THEIR CONTROL FUNCTION 29 ...
PRESSURE RELIEF VALVE ............................. 19 . CAN Communication System Description ............. 30 .
Component Layout ................................................ 20. TROUBLE DIAGNOSIS ........................................... 31 .
FRONT REFRIGERATION SYSTEM ................. 20 . CONSULT-II Function (BCM) ................................ 31 .
REAR REFRIGERATION SYSTEM ................... 21 . CONSULT-II BASIC OPERATION ...................... 31 .
DATA MONITOR ................................................ 32 .
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ..................................................... 33
.
Revision: January 2005 MTC-1 2004 Quest
WORK FLOW ..................................................... 33 . DIAGNOSTIC PROCEDURE FOR BLOWER
SYMPTOM TABLE ............................................. 33 . MOTOR ...............................................................74.
Component Parts and Harness Connector Location 35 ... COMPONENT INSPECTION ..............................78 .
ENGINE COMPARTMENT ................................. 35 . Rear Blower Motor Circuit ......................................80 .
FRONT PASSENGER COMPARTMENT ........... 36 . INSPECTION FLOW ...........................................80 .
REAR PASSENGER COMPARTMENT .............. 37 . SYSTEM DESCRIPTION ....................................81 .
Schematic .............................................................. 38 . DIAGNOSTIC PROCEDURE FOR REAR
Wiring Diagram --A/C,M-- .................................... 39 . BLOWER MOTOR ..............................................81 .
Front Air Control Terminals and Reference Value... 48 COMPONENT INSPECTION ..............................89 .
PIN CONNECTOR TERMINAL LAYOUT ........... 48 . Rear Air Control Circuit ..........................................91 .
TERMINALS AND REFERENCE VALUE FOR INSPECTION FLOW ...........................................91 .
FRONT AIR CONTROL ...................................... 48 . SYSTEM DESCRIPTION ....................................92 .
A/C System Self-diagnosis Function ..................... 50 . DIAGNOSTIC PROCEDURE FOR REAR AIR
DESCRIPTION ................................................... 50 . CONTROL ..........................................................92 .
Operational Check ................................................. 52 . Magnet Clutch Circuit .............................................94 .
CHECKING BLOWER ........................................ 52 . INSPECTION FLOW ...........................................94 .
CHECKING DISCHARGE AIR ........................... 52 . SYSTEM DESCRIPTION ....................................95 .
CHECKING RECIRCULATION ........................... 52 . DIAGNOSTIC PROCEDURE FOR MAGNET
CHECKING TEMPERATURE DECREASE ........ 53 . CLUTCH .............................................................95 .
CHECKING TEMPERATURE INCREASE ......... 53 . COMPONENT INSPECTION ..............................99 .
CHECK A/C SWITCH ......................................... 53 . Insufficient Cooling ............................................... 100 .
Power Supply and Ground Circuit for Front Air Con- INSPECTION FLOW ......................................... 100 .
trol .......................................................................... 54
. PERFORMANCE TEST DIAGNOSES ............. 101 .
INSPECTION FLOW .......................................... 54 . PERFORMANCE CHART ................................. 104 .
COMPONENT DESCRIPTION ........................... 55 . TROUBLE DIAGNOSES FOR UNUSUAL PRES-
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 55 ... SURE ................................................................ 105
.
Mode Door Motor Circuit ....................................... 57 . Insufficient Heating .............................................. 108 .
INSPECTION FLOW .......................................... 57 . INSPECTION FLOW ......................................... 108 .
SYSTEM DESCRIPTION ................................... 58 . Noise .................................................................... 109
.
COMPONENT DESCRIPTION ........................... 58 . INSPECTION FLOW ......................................... 109 .
DIAGNOSTIC PROCEDURE FOR MODE Self-diagnosis ...................................................... 110.
DOOR MOTOR .................................................. 58 . INSPECTION FLOW ......................................... 110 .
Air Mix Door Motor Circuit ..................................... 61 . Ambient Sensor Circuit ........................................ 111 .
INSPECTION FLOW .......................................... 61 . COMPONENT DESCRIPTION ......................... 111 .
SYSTEM DESCRIPTION ................................... 62 . AMBIENT TEMPERATURE INPUT PROCESS . 111
COMPONENT DESCRIPTION ........................... 62 . DIAGNOSTIC PROCEDURE FOR AMBIENT
DIAGNOSTIC PROCEDURE FOR AIR MIX SENSOR ........................................................... 111 .
DOOR MOTOR (FRONT) ................................... 62 . COMPONENT INSPECTION ............................ 113 .
DIAGNOSTIC PROCEDURE FOR AIR MIX Intake Sensor Circuit ............................................ 113 .
DOOR MOTOR (REAR) ..................................... 64 . COMPONENT DESCRIPTION ......................... 113 .
Intake Door Motor Circuit ....................................... 67 . DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
INSPECTION FLOW .......................................... 67 . SOR .................................................................. 113
.
SYSTEM DESCRIPTION ................................... 68 . COMPONENT INSPECTION ............................ 115 .
COMPONENT DESCRIPTION ........................... 68 . CONTROL UNIT ..................................................... 116 .
DIAGNOSTIC PROCEDURE FOR INTAKE Removal and Installation ...................................... 116 .
DOOR MOTOR (DRIVER) .................................. 68 . FRONT AIR CONTROL .................................... 116 .
DIAGNOSTIC PROCEDURE FOR INTAKE REAR AIR CONTROL ...................................... 116 .
DOOR MOTOR (PASSENGER) ......................... 69 . AMBIENT SENSOR ............................................... 117 .
Defroster Door Motor Circuit .................................. 70 . Removal and Installation ...................................... 117 .
SYMPTOM: ......................................................... 70 . INTAKE SENSOR ................................................... 118 .
INSPECTION FLOW .......................................... 70 . Removal and Installation ...................................... 118 .
SYSTEM DESCRIPTION ................................... 71 . REMOVAL ......................................................... 118 .
COMPONENT DESCRIPTION ........................... 71 . INSTALLATION ................................................. 118 .
DIAGNOSTIC PROCEDURE FOR BLOWER MOTOR .................................................. 119 .
DEFROSTER DOOR MOTOR ........................... 71 . Removal and Installation ...................................... 119 .
Front Blower Motor Circuit ..................................... 72 . FRONT BLOWER MOTOR ............................... 119 .
INSPECTION FLOW .......................................... 72 . REAR BLOWER MOTOR ................................. 120 .
SYSTEM DESCRIPTION ................................... 73 .
Revision: January 2005 MTC-2 2004 Quest
IN-CABIN MICROFILTER ...................................... 121 . Components ........................................................ 139 .
Removal and Installation ..................................... 121 . Removal and Installation ..................................... 142 . A
FUNCTION ....................................................... 121 . DEFROSTER NOZZLE .................................... 142 .
REPLACEMENT TIMING ................................. 121 . FRESH AIR DUCT ........................................... 142 .
REPLACEMENT PROCEDURES .................... 121 . DEFROSTER DUCT ........................................ 142 . B
HEATER & COOLING UNIT ASSEMBLY ............. 122 . RH AND LH SIDE DEMISTER DUCT .............. 142 .
Components ........................................................ 122 . RH, LH, AND CENTER VENTILATOR DUCT .. 142 .
Removal and Installation ..................................... 123 . FLOOR CONNECTOR DUCT .......................... 142 .
FRONT HEATER AND COOLING UNIT ASSEM- FLOOR DISTRIBUTION DUCT ........................ 142 . C
BLY ................................................................... 123
. FLOOR DUCT .................................................. 142 .
REAR HEATER AND COOLING UNIT ASSEM- REAR OVERHEAD DUCT ............................... 142 .
BLY ................................................................... 124
. REAR FLOOR DUCT ....................................... 142 . D
HEATER CORE ..................................................... 125 . GRILLES .......................................................... 143 .
Components ........................................................ 125 . REFRIGERANT LINES .......................................... 144 .
Removal and Installation ..................................... 126 . HFC-134a (R-134a) Service Procedure .............. 144 . E
FRONT HEATER CORE .................................. 126 . SETTING OF SERVICE TOOLS AND EQUIP-
REAR HEATER CORE .................................... 127 . MENT ............................................................... 144
.
HEATER PUMP ..................................................... 128 . Components ........................................................ 146 .
Removal and Installation ..................................... 128 . Removal and Installation for Compressor ........... 148 . F
REMOVAL ........................................................ 128 . REMOVAL ........................................................ 148 .
INSTALLATION ................................................ 128 . INSTALLATION ................................................ 148 .
DEFROSTER DOOR MOTOR ............................... 129 . Removal and Installation for Compressor Clutch . 149 G
Removal and Installation ..................................... 129 . REMOVAL ........................................................ 149 .
REMOVAL ........................................................ 129 . INSPECTION ................................................... 150 .
INSTALLATION ................................................ 129 . INSTALLATION ................................................ 150 . H
INTAKE DOOR MOTOR ........................................ 130 . BREAK-IN OPERATION ................................... 152 .
Components ........................................................ 130 . Removal and Installation for Low-pressure Flexible
Removal and Installation ..................................... 131 . Hose .................................................................... 152
.
I
DRIVER SIDE .................................................. 131 . REMOVAL ........................................................ 152 .
PASSENGER SIDE .......................................... 132 . INSTALLATION ................................................ 152 .
MODE DOOR MOTOR .......................................... 133 . Removal and Installation for High-pressure Flexible
Removal and Installation ..................................... 133 . Hose .................................................................... 152
. MTC
REMOVAL ........................................................ 133 . REMOVAL ........................................................ 152 .
INSTALLATION ................................................ 134 . INSTALLATION ................................................ 152 .
AIR MIX DOOR MOTOR ........................................ 135 . Removal and Installation for High-pressure Pipe . 153 K
Components ........................................................ 135 . REMOVAL ........................................................ 153 .
Removal and Installation ..................................... 135 . INSTALLATION ................................................ 153 .
AIR MIX DOOR MOTOR (FRONT) .................. 135 . Removal and Installation for High/Low-pressure L
AIR MIX DOOR MOTOR (REAR) .................... 136 . Pipe ..................................................................... 153
.
FRONT BLOWER MOTOR RESISTOR ................ 137 . REMOVAL ........................................................ 153 .
Removal and Installation ..................................... 137 . INSTALLATION ................................................ 153 .
REMOVAL ........................................................ 137 . Removal and Installation for Refrigerant Pressure M
INSTALLATION ................................................ 137 . Sensor ................................................................. 153
.
REAR BLOWER MOTOR RESISTOR .................. 138 . REMOVAL ........................................................ 153 .
Removal and Installation ..................................... 138 . INSTALLATION ................................................ 153 .
REMOVAL ........................................................ 138 . Removal and Installation for Condenser ............. 154 .
INSTALLATION ................................................ 138 . REMOVAL ........................................................ 154 .
DUCTS AND GRILLES ......................................... 139 . INSTALLATION ................................................ 154 .
Removal and Installation for Front Evaporator .... 155 .
REMOVAL ........................................................ 155 .
INSTALLATION ................................................ 156 .
Removal and Installation for Rear Evaporator ..... 157 .
REMOVAL ........................................................ 157 .
INSTALLATION ................................................ 158 .
Removal and Installation for Front Expansion Valve 158 .
REMOVAL ........................................................ 158 .
INSTALLATION ................................................ 158 .
Removal and Installation for Rear Expansion Valve 158 .
REMOVAL ........................................................ 158 .
Revision: January 2005 MTC-3 2004 Quest
INSTALLATION ................................................. 158 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 163 .
Checking for Refrigerant Leaks ........................... 159 . Service Data and Specifications (SDS) ............... 163 .
Checking System for Leaks Using the Fluorescent COMPRESSOR ................................................ 163.
Dye Leak Detector ............................................... 159. LUBRICANT ...................................................... 163
.
Dye Injection ........................................................ 159
. REFRIGERANT ................................................ 163
.
Electronic Refrigerant Leak Detector ................... 160 . ENGINE IDLING SPEED .................................. 163 .
PRECAUTIONS FOR HANDLING LEAK BELT TENSION ................................................ 163
.
DETECTOR ...................................................... 160.
CHECKING PROCEDURE ............................... 161 .
Revision: January 2005 MTC-4 2004 Quest
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS001RK
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front C
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING: D
q To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer. E
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section. F
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
G
Precautions for Working with HFC-134a (R-134a) EJS001RL
WARNING:
q CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants H
are mixed compressor failure is likely to occur. Refer MTC-5, "Contaminated Refrigerant" . To
determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use Refrigerant
Recovery/Recycling Recharging equipment and Refrigerant Identifier. I
q Use only specified lubricant for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) compo-
nents. If lubricant other than that specified is used, compressor failure is likely to occur.
q The specified HFC-134a (R-134a) lubricant rapidly absorbs moisture from the atmosphere. The fol- MTC
lowing handling precautions must be observed:
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