Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Quest 2004-2009 Approved Nissan Quest 2006 MTC
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J AIR CONDITIONER
A
B
SECTION
MANUAL AIR CONDITIONER C
D
E
CONTENTS
PRECAUTIONS ......................................................... 5 . AIR CONDITIONER CONTROL .............................. 25 . F
Precautions for Supplemental Restraint System Description ............................................................. 25
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Operation ............................................................... 25
.
SIONER" ................................................................. 5. AIR MIX DOOR CONTROL ................................ 25 . G
Precautions for Working with HFC-134a (R-134a) 5 ..... BLOWER SPEED CONTROL ............................ 25 .
Contaminated Refrigerant ....................................... 5 . INTAKE DOORS CONTROL .............................. 25 .
General Refrigerant Precautions ............................. 6 . MODE DOOR CONTROL .................................. 25 .
H
Precautions for Leak Detection Dye ........................ 6 . DEFROSTER DOOR CONTROL ....................... 25 .
A/C Identification Label ........................................... 6 . MAGNET CLUTCH CONTROL .......................... 26 .
Precautions for Refrigerant Connection .................. 6 . SELF-DIAGNOSTIC SYSTEM ........................... 26 .
FEATURES OF NEW TYPE REFRIGERANT Description of Control System ............................... 27 . I
CONNECTION ..................................................... 7 . Control Operation .................................................. 27
.
O-RING AND REFRIGERANT CONNECTION..... 8 DISPLAY SCREEN ............................................. 28 .
Precautions for Servicing Compressor ...................11 . TEMPERATURE CONTROL DIAL (FRONT) ..... 28 . MTC
Precautions for Service Equipment ........................11 . TEMPERATURE CONTROL DIAL (REAR) ........ 28 .
RECOVERY/RECYCLING EQUIPMENT ............11 . RECIRCULATION () SWITCH ............................ 28 .
ELECTRONIC LEAK DETECTOR ......................11 . REAR WINDOW DEFOGGER SWITCH ............ 28 .
K
VACUUM PUMP ................................................ 12 . OFF SWITCH (BLOWER SPEED SET TO 0) .... 28 .
MANIFOLD GAUGE SET ................................... 12 . A/C SWITCH ...................................................... 28.
SERVICE HOSES .............................................. 12 . MODE SWITCH ................................................. 28 .
SERVICE COUPLERS ....................................... 13 . FRONT BLOWER CONTROL DIAL ................... 28 . L
REFRIGERANT WEIGHT SCALE ..................... 13 . REAR BLOWER CONTROL DIAL ..................... 28 .
CHARGING CYLINDER ..................................... 13 . Discharge Air Flow ................................................ 29.
PREPARATION ........................................................ 14 . FRONT ............................................................... 29
. M
Special Service Tools ............................................ 14 . REAR ................................................................. 29
.
HFC-134a (R-134a) Service Tools and Equipment 14 ... System Description ................................................ 30.
Commercial Service Tools ..................................... 17 . SWITCHES AND THEIR CONTROL FUNCTION 30 ...
REFRIGERATION SYSTEM .................................... 18 . CAN Communication System Description ............. 31 .
Refrigerant Cycle .................................................. 18 . TROUBLE DIAGNOSIS ........................................... 32 .
REFRIGERANT FLOW ...................................... 18 . CONSULT-II Function (HVAC) ............................... 32 .
Refrigerant System Protection .............................. 18 . CONSULT-II BASIC OPERATION ...................... 32 .
REFRIGERANT PRESSURE SENSOR ............ 18 . SELF-DIAGNOSIS ............................................. 33 .
PRESSURE RELIEF VALVE ............................. 19 . DATA MONITOR ................................................ 33 .
Component Layout ................................................ 20 . CONSULT-II Function (BCM) ................................ 35 .
FRONT REFRIGERATION SYSTEM ................. 20 . CONSULT-II BASIC OPERATION ...................... 35 .
REAR REFRIGERATION SYSTEM ................... 21 . DATA MONITOR ................................................ 36 .
OIL ........................................................................... 22
. How to Perform Trouble Diagnosis for Quick and
Maintenance of Oil Quantity in Compressor ......... 22 . Accurate Repair ..................................................... 37
.
OIL ..................................................................... 22
. WORK FLOW ..................................................... 37 .
CHECKING AND ADJUSTING .......................... 22 . SYMPTOM TABLE ............................................. 37 .
Revision: July 2006 MTC-1 2006 Quest
Component Parts and Harness Connector Location 39 ... MOTOR ...............................................................85.
ENGINE COMPARTMENT ................................. 39 . COMPONENT INSPECTION ..............................89 .
FRONT PASSENGER COMPARTMENT ........... 40 . Rear Blower Motor Circuit ......................................90 .
REAR PASSENGER COMPARTMENT .............. 41 . INSPECTION FLOW ...........................................90 .
Schematic .............................................................. 42 . SYSTEM DESCRIPTION ....................................91 .
Wiring Diagram -- A/C,M -- .................................. 43 . DIAGNOSTIC PROCEDURE FOR REAR
Front Air Control Terminals and Reference Value... 52 BLOWER MOTOR ..............................................91 .
PIN CONNECTOR TERMINAL LAYOUT ........... 52 . COMPONENT INSPECTION ..............................99 .
TERMINALS AND REFERENCE VALUE FOR Rear Air Control Circuit ........................................ 101 .
FRONT AIR CONTROL ...................................... 52 . INSPECTION FLOW ......................................... 101 .
A/C System Self-diagnosis Function ..................... 54 . SYSTEM DESCRIPTION .................................. 102 .
DESCRIPTION ................................................... 54 . DIAGNOSTIC PROCEDURE FOR REAR AIR
Operational Check ................................................. 56 . CONTROL ........................................................ 102 .
CHECKING BLOWER ........................................ 56 . Magnet Clutch Circuit ........................................... 104 .
CHECKING DISCHARGE AIR ........................... 56 . INSPECTION FLOW ......................................... 104 .
CHECKING RECIRCULATION ........................... 56 . SYSTEM DESCRIPTION .................................. 105 .
CHECKING TEMPERATURE DECREASE ........ 57 . DIAGNOSTIC PROCEDURE FOR MAGNET
CHECKING TEMPERATURE INCREASE ......... 57 . CLUTCH ........................................................... 105 .
CHECK A/C SWITCH ......................................... 57 . Insufficient Cooling ............................................... 110 .
Power Supply and Ground Circuit for Front Air Con- INSPECTION FLOW ......................................... 110 .
trol .......................................................................... 58
. PERFORMANCE TEST DIAGNOSES ............. 111 .
INSPECTION FLOW .......................................... 58 . PERFORMANCE CHART ................................. 114 .
COMPONENT DESCRIPTION ........................... 59 . TROUBLE DIAGNOSES FOR UNUSUAL PRES-
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 59 ... SURE ................................................................ 115
.
Mode Door Motor Circuit ....................................... 61 . Insufficient Heating .............................................. 118 .
INSPECTION FLOW .......................................... 61 . INSPECTION FLOW ......................................... 118 .
SYSTEM DESCRIPTION ................................... 62 . Heater Pump Circuit ............................................. 119 .
COMPONENT DESCRIPTION ........................... 62 . SYSTEM DESCRIPTION .................................. 119 .
DIAGNOSTIC PROCEDURE FOR MODE DIAGNOSTIC PROCEDURE FOR HEATER
DOOR MOTOR .................................................. 62 . PUMP CIRCUIT ................................................ 120 .
Air Mix Door Motor Circuit ..................................... 66 . COMPONENT INSPECTION ............................ 121 .
INSPECTION FLOW .......................................... 66 . Noise .................................................................... 122
.
SYSTEM DESCRIPTION ................................... 67 . INSPECTION FLOW ......................................... 122 .
COMPONENT DESCRIPTION ........................... 67 . Self-diagnosis ...................................................... 123.
DIAGNOSTIC PROCEDURE FOR AIR MIX INSPECTION FLOW ......................................... 123 .
DOOR MOTOR (FRONT) ................................... 68 . Ambient Sensor Circuit ........................................ 124 .
DIAGNOSTIC PROCEDURE FOR AIR MIX COMPONENT DESCRIPTION ......................... 124 .
DOOR MOTOR (REAR) ..................................... 71 . AMBIENT TEMPERATURE INPUT PROCESS .124
Intake Door Motor Circuit ....................................... 75 . DIAGNOSTIC PROCEDURE FOR AMBIENT
INSPECTION FLOW .......................................... 75 . SENSOR ........................................................... 124 .
SYSTEM DESCRIPTION ................................... 76 . COMPONENT INSPECTION ............................ 126 .
COMPONENT DESCRIPTION ........................... 76 . Intake Sensor Circuit ............................................ 126 .
DIAGNOSTIC PROCEDURE FOR INTAKE COMPONENT DESCRIPTION ......................... 126 .
DOOR MOTOR (DRIVER) .................................. 76 . DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
DIAGNOSTIC PROCEDURE FOR INTAKE SOR .................................................................. 126
.
DOOR MOTOR (PASSENGER) ......................... 78 . COMPONENT INSPECTION ............................ 128 .
Defroster Door Motor Circuit .................................. 80 . CONTROL UNIT ..................................................... 129 .
SYMPTOM: ......................................................... 80 . Removal and Installation ...................................... 129 .
INSPECTION FLOW .......................................... 80 . FRONT AIR CONTROL .................................... 129 .
SYSTEM DESCRIPTION ................................... 81 . REAR AIR CONTROL ...................................... 129 .
COMPONENT DESCRIPTION ........................... 81 . AMBIENT SENSOR ............................................... 130 .
DIAGNOSTIC PROCEDURE FOR Removal and Installation ...................................... 130 .
DEFROSTER DOOR MOTOR ........................... 81 . REMOVAL ......................................................... 130 .
Front Blower Motor Circuit ..................................... 83 . INSTALLATION ................................................. 130 .
INSPECTION FLOW .......................................... 83 . INTAKE SENSOR ................................................... 131 .
SYSTEM DESCRIPTION ................................... 84 . Removal and Installation ...................................... 131 .
COMPONENT DESCRIPTION ........................... 84 . REMOVAL ......................................................... 131 .
DIAGNOSTIC PROCEDURE FOR BLOWER INSTALLATION ................................................. 131 .
Revision: July 2006 MTC-2 2006 Quest
BLOWER MOTOR ................................................. 132 . Components ........................................................ 151 .
Removal and Installation ..................................... 132 . Removal and Installation ..................................... 154 . A
FRONT BLOWER MOTOR .............................. 132 . DEFROSTER NOZZLE .................................... 154 .
REAR BLOWER MOTOR ................................ 132 . FRESH AIR DUCT ........................................... 154 .
IN-CABIN MICROFILTER ...................................... 133 . DEFROSTER DUCT ........................................ 154 . B
Removal and Installation ..................................... 133 . RH AND LH SIDE DEMISTER DUCT .............. 154 .
FUNCTION ....................................................... 133 . RH, LH, AND CENTER VENTILATOR DUCT .. 154 .
REPLACEMENT TIMING ................................. 133 . FLOOR CONNECTOR DUCT .......................... 154 .
REPLACEMENT PROCEDURES .................... 133 . FLOOR DISTRIBUTION DUCT ........................ 154 . C
HEATER & COOLING UNIT ASSEMBLY ............. 134 . FLOOR DUCT .................................................. 155 .
Components ........................................................ 134 . REAR OVERHEAD DUCT ............................... 155 .
Removal and Installation ..................................... 135 . REAR FLOOR DUCT ....................................... 155 . D
FRONT HEATER AND COOLING UNIT ASSEM- GRILLES .......................................................... 155 .
BLY ................................................................... 135
. REFRIGERANT LINES .......................................... 156 .
REAR HEATER AND COOLING UNIT ASSEM- HFC-134a (R-134a) Service Procedure .............. 156 . E
BLY ................................................................... 136
. SETTING OF SERVICE TOOLS AND EQUIP-
HEATER CORE ..................................................... 137 . MENT ............................................................... 156
.
Components ........................................................ 137 . Components ........................................................ 158 .
Removal and Installation ..................................... 138 . Removal and Installation for Compressor ........... 160 . F
FRONT HEATER CORE .................................. 138 . REMOVAL ........................................................ 160 .
REAR HEATER CORE .................................... 139 . INSTALLATION ................................................ 160 .
HEATER PUMP ..................................................... 140 . Removal and Installation for Compressor Clutch . 161 G
Removal and Installation ..................................... 140 . REMOVAL ........................................................ 161 .
REMOVAL ........................................................ 140 . INSPECTION ................................................... 162 .
INSTALLATION ................................................ 140 . INSTALLATION ................................................ 162 . H
DEFROSTER DOOR MOTOR ............................... 141 . BREAK-IN OPERATION ................................... 164 .
Removal and Installation ..................................... 141 . Removal and Installation for Low-pressure Flexible
REMOVAL ........................................................ 141 . Hose .................................................................... 164
.
I
INSTALLATION ................................................ 141 . REMOVAL ........................................................ 164 .
INTAKE DOOR MOTOR ........................................ 142 . INSTALLATION ................................................ 164 .
Components ........................................................ 142 . Removal and Installation for High-pressure Flexible
Removal and Installation ..................................... 143 . Hose .................................................................... 164
. MTC
DRIVER SIDE .................................................. 143 . REMOVAL ........................................................ 164 .
PASSENGER SIDE .......................................... 144 . INSTALLATION ................................................ 164 .
MODE DOOR MOTOR .......................................... 145 . Removal and Installation for High-pressure Pipe . 164 K
Removal and Installation ..................................... 145 . REMOVAL ........................................................ 164 .
REMOVAL ........................................................ 145 . INSTALLATION ................................................ 164 .
INSTALLATION ................................................ 146 . Removal and Installation for High/Low-pressure L
AIR MIX DOOR MOTOR ........................................ 147 . Pipe ..................................................................... 165
.
Components ........................................................ 147 . REMOVAL ........................................................ 165 .
Removal and Installation ..................................... 147 . INSTALLATION ................................................ 167 .
AIR MIX DOOR MOTOR (FRONT) .................. 147 . Removal and Installation for Refrigerant Pressure M
AIR MIX DOOR MOTOR (REAR) .................... 148 . Sensor ................................................................. 168
.
VARIABLE BLOWER CONTROL ......................... 149 . REMOVAL ........................................................ 168 .
Removal and Installation ..................................... 149 . INSTALLATION ................................................ 169 .
REMOVAL ........................................................ 149 . Removal and Installation for Condenser ............. 169 .
INSTALLATION ................................................ 149 . REMOVAL ........................................................ 169 .
REAR BLOWER MOTOR RESISTOR .................. 150 . INSTALLATION ................................................ 169 .
Removal and Installation ..................................... 150 . Removal and Installation for Front Evaporator .... 170 .
REMOVAL ........................................................ 150 . REMOVAL ........................................................ 170 .
INSTALLATION ................................................ 150 . INSTALLATION ................................................ 171 .
DUCTS AND GRILLES ......................................... 151 . Removal and Installation for Rear Evaporator ..... 172 .
REMOVAL ........................................................ 172 .
INSTALLATION ................................................ 173 .
Removal and Installation for Front Expansion Valve 173 .
REMOVAL ........................................................ 173 .
INSTALLATION ................................................ 173 .
Removal and Installation for Rear Expansion Valve 173 .
REMOVAL ........................................................ 173 .
Revision: July 2006 MTC-3 2006 Quest
INSTALLATION ................................................. 173 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 178 .
Checking for Refrigerant Leaks ........................... 174 . Service Data and Specifications (SDS) ............... 178 .
Checking System for Leaks Using the Fluorescent COMPRESSOR ................................................ 178 .
Dye Leak Detector ............................................... 174. OIL .................................................................... 178
.
Dye Injection ........................................................ 174
. REFRIGERANT ................................................ 178 .
Electronic Refrigerant Leak Detector ................... 175 . ENGINE IDLING SPEED .................................. 178 .
PRECAUTIONS FOR HANDLING LEAK BELT TENSION ................................................ 178 .
DETECTOR ...................................................... 175.
CHECKING PROCEDURE ............................... 176 .
Revision: July 2006 MTC-4 2006 Quest
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS004LO
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) EJS004LP
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 recov-
ery/recycling equipment and refrigerant identifier. I
q Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components.
If oil other than that specified is used, compressor failure is likely to occur.
q The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following MTC
handling precautions must be observed:
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