Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Quest 2004-2009 Approved Nissan Quest 2005 MTC
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J AIR CONDITIONER
A
B
SECTION
MANUAL AIR CONDITIONER C
D
E
CONTENTS
PRECAUTIONS ......................................................... 5
. AIR CONDITIONER CONTROL .............................. 24 . F
Precautions for Supplemental Restraint System Description ............................................................. 24
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Operation ............................................................... 24
.
SIONER" ................................................................. 5
. AIR MIX DOOR CONTROL ................................ 24 . G
Precautions for Working with HFC-134a (R-134a) 5 ..... FAN SPEED CONTROL ..................................... 24 .
Contaminated Refrigerant ....................................... 5 . INTAKE DOORS CONTROL .............................. 24 .
General Refrigerant Precautions ............................. 6 . MODE DOOR CONTROL .................................. 24 .
H
Precautions for Leak Detection Dye ........................ 6 . DEFROSTER DOOR CONTROL ....................... 24 .
A/C Identification Label ........................................... 7
. MAGNET CLUTCH CONTROL .......................... 25 .
Precautions for Refrigerant Connection .................. 7 . SELF-DIAGNOSTIC SYSTEM ........................... 25 .
FEATURES OF NEW TYPE REFRIGERANT Description of Control System ............................... 26 . I
CONNECTION ..................................................... 7. Control Operation .................................................. 26
.
O-RING AND REFRIGERANT CONNECTION..... 8 DISPLAY SCREEN ............................................. 27 .
Precautions for Servicing Compressor ...................11 . TEMPERATURE SWITCH (TEMPERATURE MTC
Precautions for Service Equipment ........................11 . CONTROL) (FRONT) ......................................... 27 .
RECOVERY/RECYCLING EQUIPMENT ............11 . TEMPERATURE SWITCH (TEMPERATURE
ELECTRONIC LEAK DETECTOR ......................11 . CONTROL) (REAR) ........................................... 27 .
K
VACUUM PUMP ................................................ 12 . RECIRCULATION () SWITCH ............................ 27 .
MANIFOLD GAUGE SET ................................... 12 . REAR WINDOW DEFOGGER SWITCH ............ 27 .
SERVICE HOSES .............................................. 12 . OFF SWITCH (BLOWER SPEED SET TO 0) .... 27 .
SERVICE COUPLERS ....................................... 13 . A/C SWITCH ...................................................... 27. L
CHARGING CYLINDER ..................................... 13 . MODE SWITCH ................................................. 27 .
Wiring Diagrams and Trouble Diagnosis ............... 13 . FRONT FAN CONTROL SWITCH ..................... 27 .
PREPARATION ........................................................ 14
. REAR FAN CONTROL SWITCH ........................ 27 . M
Special Service Tools ............................................ 14
. Discharge Air Flow ................................................ 28.
HFC-134a (R-134a) Service Tools and Equipment 14 ... FRONT ............................................................... 28
.
Commercial Service Tools ..................................... 16 . REAR ................................................................. 28
.
REFRIGERATION SYSTEM .................................... 18 . System Description ................................................ 29.
Refrigerant Cycle .................................................. 18
. SWITCHES AND THEIR CONTROL FUNCTION 29 ...
REFRIGERANT FLOW ...................................... 18 . CAN Communication System Description ............. 30 .
Refrigerant System Protection .............................. 18 . TROUBLE DIAGNOSIS ........................................... 31 .
REFRIGERANT PRESSURE SENSOR ............ 18 . CONSULT-II Function (BCM) ................................ 31 .
PRESSURE RELIEF VALVE ............................. 19 . CONSULT-II BASIC OPERATION ...................... 31 .
Component Layout ................................................ 20. DATA MONITOR ................................................ 32 .
FRONT REFRIGERATION SYSTEM ................. 20 . How to Perform Trouble Diagnosis for Quick and
REAR REFRIGERATION SYSTEM ................... 21 . Accurate Repair ..................................................... 33
.
LUBRICANT ............................................................ 22
. WORK FLOW ..................................................... 33 .
Maintenance of Lubricant Quantity in Compressor 22 ... SYMPTOM TABLE ............................................. 33 .
LUBRICANT ....................................................... 22
. Component Parts and Harness Connector Location 35 ...
CHECKING AND ADJUSTING .......................... 22 . ENGINE COMPARTMENT ................................. 35 .
Revision: September 2004 MTC-1 2005 Quest
FRONT PASSENGER COMPARTMENT ........... 36 . COMPONENT INSPECTION ..............................77 .
REAR PASSENGER COMPARTMENT .............. 37 . Rear Blower Motor Circuit ......................................79 .
Schematic .............................................................. 38 . INSPECTION FLOW ...........................................79 .
Wiring Diagram -- A/C -- ...................................... 39 . SYSTEM DESCRIPTION ....................................80 .
Front Air Control Terminals and Reference Value... 48 DIAGNOSTIC PROCEDURE FOR REAR
PIN CONNECTOR TERMINAL LAYOUT ........... 48 . BLOWER MOTOR ..............................................80 .
TERMINALS AND REFERENCE VALUE FOR COMPONENT INSPECTION ..............................88 .
FRONT AIR CONTROL ...................................... 48 . Rear Air Control Circuit ..........................................90 .
A/C System Self-diagnosis Function ..................... 50 . INSPECTION FLOW ...........................................90 .
DESCRIPTION ................................................... 50 . SYSTEM DESCRIPTION ....................................91 .
Operational Check ................................................. 52 . DIAGNOSTIC PROCEDURE FOR REAR AIR
CHECKING BLOWER ........................................ 52 . CONTROL ..........................................................91 .
CHECKING DISCHARGE AIR ........................... 52 . Magnet Clutch Circuit .............................................93 .
CHECKING RECIRCULATION ........................... 52 . INSPECTION FLOW ...........................................93 .
CHECKING TEMPERATURE DECREASE ........ 53 . SYSTEM DESCRIPTION ....................................94 .
CHECKING TEMPERATURE INCREASE ......... 53 . DIAGNOSTIC PROCEDURE FOR MAGNET
CHECK A/C SWITCH ......................................... 53 . CLUTCH .............................................................94 .
Power Supply and Ground Circuit for Front Air Con- COMPONENT INSPECTION ..............................98 .
trol .......................................................................... 54
. Insufficient Cooling .................................................99 .
INSPECTION FLOW .......................................... 54 . INSPECTION FLOW ...........................................99 .
COMPONENT DESCRIPTION ........................... 55 . PERFORMANCE TEST DIAGNOSES ............. 100 .
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 55 ... PERFORMANCE CHART ................................. 103 .
Mode Door Motor Circuit ....................................... 57 . TROUBLE DIAGNOSES FOR UNUSUAL PRES-
INSPECTION FLOW .......................................... 57 . SURE ................................................................ 104
.
SYSTEM DESCRIPTION ................................... 58 . Insufficient Heating .............................................. 107 .
COMPONENT DESCRIPTION ........................... 58 . INSPECTION FLOW ......................................... 107 .
DIAGNOSTIC PROCEDURE FOR MODE Noise .................................................................... 108
.
DOOR MOTOR .................................................. 58 . INSPECTION FLOW ......................................... 108 .
Air Mix Door Motor Circuit ..................................... 61 . Self-diagnosis ...................................................... 109.
INSPECTION FLOW .......................................... 61 . INSPECTION FLOW ......................................... 109 .
SYSTEM DESCRIPTION ................................... 62 . Ambient Sensor Circuit ........................................ 110 .
COMPONENT DESCRIPTION ........................... 62 . COMPONENT DESCRIPTION ......................... 110 .
DIAGNOSTIC PROCEDURE FOR AIR MIX AMBIENT TEMPERATURE INPUT PROCESS . 110
DOOR MOTOR (FRONT) ................................... 62 . DIAGNOSTIC PROCEDURE FOR AMBIENT
DIAGNOSTIC PROCEDURE FOR AIR MIX SENSOR ........................................................... 110 .
DOOR MOTOR (REAR) ..................................... 64 . COMPONENT INSPECTION ............................ 112 .
Intake Door Motor Circuit ....................................... 67 . Intake Sensor Circuit ............................................ 112 .
INSPECTION FLOW .......................................... 67 . COMPONENT DESCRIPTION ......................... 112 .
SYSTEM DESCRIPTION ................................... 68 . DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
COMPONENT DESCRIPTION ........................... 68 . SOR .................................................................. 112
.
DIAGNOSTIC PROCEDURE FOR INTAKE COMPONENT INSPECTION ............................ 114 .
DOOR MOTOR (DRIVER) .................................. 68 . CONTROL UNIT ..................................................... 115 .
DIAGNOSTIC PROCEDURE FOR INTAKE Removal and Installation ...................................... 115 .
DOOR MOTOR (PASSENGER) ......................... 69 . FRONT AIR CONTROL .................................... 115 .
Defroster Door Motor Circuit .................................. 70 . REAR AIR CONTROL ...................................... 115 .
SYMPTOM: ......................................................... 70 . AMBIENT SENSOR ............................................... 116 .
INSPECTION FLOW .......................................... 70 . Removal and Installation ...................................... 116 .
SYSTEM DESCRIPTION ................................... 71 . REMOVAL ......................................................... 116 .
COMPONENT DESCRIPTION ........................... 71 . INSTALLATION ................................................. 116 .
DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR ................................................... 117 .
DEFROSTER DOOR MOTOR ........................... 71 . Removal and Installation ...................................... 117 .
Front Blower Motor Circuit ..................................... 72 . REMOVAL ......................................................... 117 .
INSPECTION FLOW .......................................... 72 . INSTALLATION ................................................. 117 .
SYSTEM DESCRIPTION ................................... 73 . BLOWER MOTOR .................................................. 118 .
COMPONENT DESCRIPTION ........................... 73 . Removal and Installation ...................................... 118 .
DIAGNOSTIC PROCEDURE FOR BLOWER FRONT BLOWER MOTOR ............................... 118 .
MOTOR .............................................................. 74 . REAR BLOWER MOTOR ................................. 118 .
Revision: September 2004 MTC-2 2005 Quest
IN-CABIN MICROFILTER .......................................119 . Components ........................................................ 137 .
Removal and Installation ......................................119 . Removal and Installation ..................................... 140 . A
FUNCTION ........................................................119 . DEFROSTER NOZZLE .................................... 140 .
REPLACEMENT TIMING ..................................119 . FRESH AIR DUCT ........................................... 140 .
REPLACEMENT PROCEDURES .....................119 . DEFROSTER DUCT ........................................ 140 . B
HEATER & COOLING UNIT ASSEMBLY ............. 120 . RH AND LH SIDE DEMISTER DUCT .............. 140 .
Components ........................................................ 120 . RH, LH, AND CENTER VENTILATOR DUCT .. 140 .
Removal and Installation ..................................... 121 . FLOOR CONNECTOR DUCT .......................... 140 .
FRONT HEATER AND COOLING UNIT ASSEM- FLOOR DISTRIBUTION DUCT ........................ 140 . C
BLY ................................................................... 121
. FLOOR DUCT .................................................. 141 .
REAR HEATER AND COOLING UNIT ASSEM- REAR OVERHEAD DUCT ............................... 141 .
BLY ................................................................... 122
. REAR FLOOR DUCT ....................................... 141 . D
HEATER CORE ..................................................... 123 . GRILLES .......................................................... 141 .
Components ........................................................ 123 . REFRIGERANT LINES .......................................... 142 .
Removal and Installation ..................................... 124 . HFC-134a (R-134a) Service Procedure .............. 142 . E
FRONT HEATER CORE .................................. 124 . SETTING OF SERVICE TOOLS AND EQUIP-
REAR HEATER CORE .................................... 125 . MENT ............................................................... 142
.
HEATER PUMP ..................................................... 126 . Components ........................................................ 144 .
Removal and Installation ..................................... 126 . Removal and Installation for Compressor ........... 146 . F
REMOVAL ........................................................ 126 . REMOVAL ........................................................ 146 .
INSTALLATION ................................................ 126 . INSTALLATION ................................................ 146 .
DEFROSTER DOOR MOTOR ............................... 127 . Removal and Installation for Compressor Clutch . 147 G
Removal and Installation ..................................... 127 . REMOVAL ........................................................ 147 .
REMOVAL ........................................................ 127 . INSPECTION ................................................... 148 .
INSTALLATION ................................................ 127 . INSTALLATION ................................................ 148 . H
INTAKE DOOR MOTOR ........................................ 128 . BREAK-IN OPERATION ................................... 150 .
Components ........................................................ 128 . Removal and Installation for Low-pressure Flexible
Removal and Installation ..................................... 129 . Hose .................................................................... 150
.
I
DRIVER SIDE .................................................. 129 . REMOVAL ........................................................ 150 .
PASSENGER SIDE .......................................... 130 . INSTALLATION ................................................ 150 .
MODE DOOR MOTOR .......................................... 131 . Removal and Installation for High-pressure Flexible
Removal and Installation ..................................... 131 . Hose .................................................................... 150
. MTC
REMOVAL ........................................................ 131 . REMOVAL ........................................................ 150 .
INSTALLATION ................................................ 132 . INSTALLATION ................................................ 150 .
AIR MIX DOOR MOTOR ........................................ 133 . Removal and Installation for High-pressure Pipe . 150 K
Components ........................................................ 133 . REMOVAL ........................................................ 150 .
Removal and Installation ..................................... 133 . INSTALLATION ................................................ 150 .
AIR MIX DOOR MOTOR (FRONT) .................. 133 . Removal and Installation for High/Low-pressure L
AIR MIX DOOR MOTOR (REAR) .................... 134 . Pipe ..................................................................... 151
.
VARIABLE BLOWER CONTROL ......................... 135 . REMOVAL ........................................................ 151 .
Removal and Installation ..................................... 135 . INSTALLATION ................................................ 151 .
REMOVAL ........................................................ 135 . Removal and Installation for Refrigerant Pressure M
INSTALLATION ................................................ 135 . Sensor ................................................................. 151
.
REAR BLOWER MOTOR RESISTOR .................. 136 . REMOVAL ........................................................ 151 .
Removal and Installation ..................................... 136 . INSTALLATION ................................................ 151 .
REMOVAL ........................................................ 136 . Removal and Installation for Condenser ............. 151 .
INSTALLATION ................................................ 136 . REMOVAL ........................................................ 151 .
DUCTS AND GRILLES ......................................... 137 . INSTALLATION ................................................ 152 .
Removal and Installation for Front Evaporator .... 152 .
REMOVAL ........................................................ 153 .
INSTALLATION ................................................ 153 .
Removal and Installation for Rear Evaporator ..... 154 .
REMOVAL ........................................................ 154 .
INSTALLATION ................................................ 155 .
Removal and Installation for Front Expansion Valve 155 .
REMOVAL ........................................................ 155 .
INSTALLATION ................................................ 155 .
Removal and Installation for Rear Expansion Valve 155 .
REMOVAL ........................................................ 155 .
Revision: September 2004 MTC-3 2005 Quest
INSTALLATION ................................................. 155 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 160 .
Checking for Refrigerant Leaks ........................... 156 . Service Data and Specifications (SDS) ............... 160 .
Checking System for Leaks Using the Fluorescent COMPRESSOR ................................................ 160.
Dye Leak Detector ............................................... 156. LUBRICANT ...................................................... 160
.
Dye Injection ........................................................ 156
. REFRIGERANT ................................................ 160
.
Electronic Refrigerant Leak Detector ................... 157 . ENGINE IDLING SPEED .................................. 160 .
PRECAUTIONS FOR HANDLING LEAK BELT TENSION ................................................ 160
.
DETECTOR ...................................................... 157.
CHECKING PROCEDURE ............................... 158 .
Revision: September 2004 MTC-4 2005 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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