Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Armada 2004-2009 Approved Nissan Armada 2004 MTC
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J AIR CONDITIONER
A
B
SECTION
MANUAL AIR CONDITIONER C
D
E
CONTENTS
PRECAUTIONS ......................................................... 4
. LUBRICANT ............................................................. 21
. F
Precautions for Supplemental Restraint System Maintenance of Lubricant Quantity in Compressor 21 ...
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- LUBRICANT ....................................................... 21.
SIONER" ................................................................. 4
. CHECKING AND ADJUSTING ........................... 21 . G
Precautions for Working with HFC-134a (R-134a) 4 ..... AIR CONDITIONER CONTROL .............................. 23 .
Contaminated Refrigerant ....................................... 4 . Description ............................................................. 23
.
General Refrigerant Precautions ............................. 5 . Operation ............................................................... 23
.
H
Precautions for Leak Detection Dye ........................ 5 . AIR MIX DOOR CONTROL ................................ 23 .
A/C Identification Label ........................................... 6
. BLOWER SPEED CONTROL ............................ 23 .
Precautions for Refrigerant Connection .................. 6 . INTAKE DOORS CONTROL .............................. 23 .
FEATURES OF NEW TYPE REFRIGERANT MODE DOOR CONTROL .................................. 23 . I
CONNECTION ..................................................... 6. DEFROSTER DOOR CONTROL ....................... 23 .
O-RING AND REFRIGERANT CONNECTION..... 7 MAGNET CLUTCH CONTROL .......................... 24 .
Precautions for Servicing Compressor .................. 10 . Description of Control System ............................... 25 . MTC
Precautions for Service Equipment ....................... 10 . Control Operation .................................................. 25
.
RECOVERY/RECYCLING EQUIPMENT ........... 10 . TEMPERATURE SWITCH (TEMPERATURE
ELECTRONIC LEAK DETECTOR ..................... 10 . CONTROL) (FRONT) ......................................... 26 .
K
VACUUM PUMP .................................................11 . TEMPERATURE SWITCH (TEMPERATURE
MANIFOLD GAUGE SET ....................................11 . CONTROL) (REAR) ........................................... 26 .
SERVICE HOSES ...............................................11 . RECIRCULATION () SWITCH ............................ 26 .
SERVICE COUPLERS ....................................... 12 . REAR WINDOW DEFOGGER SWITCH ............ 26 . L
REFRIGERANT WEIGHT SCALE ..................... 12 . OFF SWITCH (BLOWER SPEED SET TO 0) .... 26 .
CHARGING CYLINDER ..................................... 12 . A/C SWITCH ...................................................... 26.
Wiring Diagrams and Trouble Diagnosis ............... 12 . MODE SWITCH ................................................. 26 . M
PREPARATION ........................................................ 13
. REAR BLOWER SWITCH (FRONT) .................. 26 .
Special Service Tools ............................................ 13
. REAR BLOWER SWITCH (REAR) .................... 26 .
HFC-134a (R-134a) Service Tools and Equipment 13 ... Discharge Air Flow ................................................ 27.
Commercial Service Tools ..................................... 15 . FRONT ............................................................... 27
.
REFRIGERATION SYSTEM .................................... 17 . REAR ................................................................. 27
.
Refrigerant Cycle .................................................. 17
. System Description (Front) .................................... 28 .
REFRIGERANT FLOW ...................................... 17 . SWITCHES AND THEIR CONTROL FUNCTION 28 ...
Refrigerant System Protection .............................. 17 . System Description (Rear) .................................... 29 .
REFRIGERANT PRESSURE SENSOR ............ 17 . SWITCHES AND THEIR CONTROL FUNCTION 29 ...
PRESSURE RELIEF VALVE ............................. 18 . CAN Communication System Description ............. 30 .
Component Layout ................................................ 19. TROUBLE DIAGNOSIS ........................................... 31 .
FRONT REFRIGERATION SYSTEM ................. 19 . CONSULT-II Function (BCM) ................................ 31 .
REAR REFRIGERATION SYSTEM ................... 20 . 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 Pathfinder Armada
WORK FLOW ..................................................... 33 . DIAGNOSTIC PROCEDURE FOR BLOWER
SYMPTOM TABLE ............................................. 33 . MOTOR ...............................................................72.
Component Parts and Harness Connector Location 34 ... COMPONENT INSPECTION ..............................76 .
ENGINE COMPARTMENT ................................. 34 . Rear Blower Motor Circuit ......................................78 .
FRONT PASSENGER COMPARTMENT ........... 35 . INSPECTION FLOW ...........................................78 .
REAR PASSENGER COMPARTMENT .............. 36 . SYSTEM DESCRIPTION ....................................79 .
Schematic .............................................................. 37 . DIAGNOSTIC PROCEDURE FOR REAR
Wiring Diagram -- A/C,M -- .................................. 38 . BLOWER MOTOR ..............................................79 .
Front Air Control Terminals and Reference Value... 47 COMPONENT INSPECTION ..............................87 .
PIN CONNECTOR TERMINAL LAYOUT ........... 47 . Rear Air Control Circuit ..........................................89 .
TERMINALS AND REFERENCE VALUE FOR INSPECTION FLOW ...........................................89 .
FRONT AIR CONTROL ...................................... 47 . SYSTEM DESCRIPTION ....................................90 .
Operational Check (Front) ..................................... 49 . DIAGNOSTIC PROCEDURE FOR REAR AIR
CHECKING BLOWER ........................................ 49 . CONTROL ..........................................................90 .
CHECKING DISCHARGE AIR ........................... 49 . Magnet Clutch Circuit .............................................92 .
CHECKING RECIRCULATION ........................... 49 . INSPECTION FLOW ...........................................92 .
CHECKING TEMPERATURE DECREASE ........ 50 . SYSTEM DESCRIPTION ....................................93 .
CHECKING TEMPERATURE INCREASE ......... 50 . DIAGNOSTIC PROCEDURE FOR MAGNET
CHECK A/C SWITCH ......................................... 50 . CLUTCH .............................................................93 .
Operational Check (Rear) ...................................... 51 . COMPONENT INSPECTION ..............................97 .
CHECKING BLOWER ........................................ 51 . Insufficient Cooling .................................................98 .
CHECKING TEMPERATURE DECREASE ........ 51 . INSPECTION FLOW ...........................................98 .
CHECKING TEMPERATURE INCREASE ......... 51 . PERFORMANCE TEST DIAGNOSES ...............99 .
Power Supply and Ground Circuit for Front Air Con- PERFORMANCE CHART ................................. 101 .
trol .......................................................................... 52
. TROUBLE DIAGNOSES FOR UNUSUAL PRES-
INSPECTION FLOW .......................................... 52 . SURE ................................................................ 102
.
COMPONENT DESCRIPTION ........................... 53 . Insufficient Heating .............................................. 105 .
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 53 ... INSPECTION FLOW ......................................... 105 .
Mode Door Motor Circuit ....................................... 55 . Noise .................................................................... 106
.
INSPECTION FLOW .......................................... 55 . INSPECTION FLOW ......................................... 106 .
SYSTEM DESCRIPTION ................................... 56 . Water Valve Circuit ............................................... 107 .
COMPONENT DESCRIPTION ........................... 56 . COMPONENT DESCRIPTION ......................... 107 .
DIAGNOSTIC PROCEDURE FOR MODE DIAGNOSTIC PROCEDURE FOR WATER
DOOR MOTOR .................................................. 57 . VALVE ............................................................... 107
.
Air Mix Door Motor Circuit ..................................... 59 . COMPONENT INSPECTION ............................ 109 .
INSPECTION FLOW .......................................... 59 . Intake Sensor Circuit ............................................ 109 .
SYSTEM DESCRIPTION ................................... 60 . COMPONENT DESCRIPTION ......................... 109 .
COMPONENT DESCRIPTION ........................... 60 . DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
DIAGNOSTIC PROCEDURE FOR AIR MIX SOR .................................................................. 109
.
DOOR MOTOR (FRONT) ................................... 61 . COMPONENT INSPECTION ............................ 111 .
DIAGNOSTIC PROCEDURE FOR AIR MIX CONTROL UNIT ..................................................... 112 .
DOOR MOTOR (REAR) ..................................... 62 . Removal and Installation ...................................... 112 .
Intake Door Motor Circuit ....................................... 64 . FRONT AIR CONTROL .................................... 112 .
INSPECTION FLOW .......................................... 64 . REAR AIR CONTROL ...................................... 112 .
SYSTEM DESCRIPTION ................................... 65 . INTAKE SENSOR ................................................... 113 .
COMPONENT DESCRIPTION ........................... 65 . Removal and Installation ...................................... 113 .
DIAGNOSTIC PROCEDURE FOR INTAKE REMOVAL ......................................................... 113 .
DOOR MOTOR .................................................. 66 . INSTALLATION ................................................. 113 .
Defroster Door Motor Circuit .................................. 67 . BLOWER MOTOR .................................................. 114 .
SYMPTOM: ......................................................... 67 . Components ......................................................... 114 .
INSPECTION FLOW .......................................... 67 . Removal and Installation ...................................... 114 .
SYSTEM DESCRIPTION ................................... 68 . FRONT BLOWER MOTOR ............................... 114 .
COMPONENT DESCRIPTION ........................... 68 . REAR BLOWER MOTOR ................................. 115 .
DIAGNOSTIC PROCEDURE FOR IN-CABIN MICROFILTER ....................................... 116 .
DEFROSTER DOOR MOTOR ........................... 68 . Removal and Installation ...................................... 116 .
Front Blower Motor Circuit ..................................... 70 . FUNCTION ....................................................... 116 .
INSPECTION FLOW .......................................... 70 . REPLACEMENT TIMING ................................. 116 .
SYSTEM DESCRIPTION ................................... 71 . REPLACEMENT PROCEDURE ....................... 116 .
COMPONENT DESCRIPTION ........................... 71 . HEATER & COOLING UNIT ASSEMBLY .............. 118 .
Revision: January 2005 MTC-2 2004 Pathfinder Armada
Components .........................................................118. REMOVAL ........................................................ 140 .
Removal and Installation ......................................119 . INSTALLATION ................................................ 141 . A
FRONT HEATER AND COOLING UNIT ASSEM- Removal and Installation for Compressor Clutch . 141
BLY ....................................................................119
. REMOVAL ........................................................ 141 .
REAR HEATER AND COOLING UNIT ASSEM- INSPECTION ................................................... 142 . B
BLY ................................................................... 120
. INSTALLATION ................................................ 142 .
HEATER CORE ..................................................... 121 . BREAK-IN OPERATION ................................... 144 .
Components ........................................................ 121. Removal and Installation for Low-pressure Flexible
Removal and Installation ..................................... 122 . Hose .................................................................... 144
. C
FRONT HEATER CORE .................................. 122 . REMOVAL ........................................................ 144 .
REAR HEATER CORE .................................... 123 . INSTALLATION ................................................ 144 .
DEFROSTER DOOR MOTOR ............................... 124 . Removal and Installation for High-pressure Flexible D
Removal and Installation ..................................... 124 . Hose .................................................................... 144
.
REMOVAL ........................................................ 124 . REMOVAL ........................................................ 144 .
INSTALLATION ................................................ 124 . INSTALLATION ................................................ 144 . E
INTAKE DOOR MOTOR ........................................ 125 . Removal and Installation for High-pressure Pipe . 144
Removal and Installation ..................................... 125 . REMOVAL ........................................................ 144 .
REMOVAL ........................................................ 125 . INSTALLATION ................................................ 144 .
INSTALLATION ................................................ 125 . Removal and Installation for Low-pressure Pipe . 145 F
MODE DOOR MOTOR .......................................... 126 . REMOVAL ........................................................ 145 .
Removal and Installation ..................................... 126 . INSTALLATION ................................................ 145 .
REMOVAL ........................................................ 126 . Removal and Installation for Refrigerant Pressure G
INSTALLATION ................................................ 126 . Sensor ................................................................. 145
.
AIR MIX DOOR MOTOR ........................................ 127 . REMOVAL ........................................................ 145 .
Components ........................................................ 127. INSTALLATION ................................................ 145 . H
Removal and Installation ..................................... 127 . Removal and Installation for Condenser ............. 145 .
FRONT AIR MIX DOOR MOTOR .................... 127 . REMOVAL ........................................................ 145 .
REAR AIR MIX DOOR MOTOR ....................... 128 . INSTALLATION ................................................ 146 .
I
FRONT BLOWER MOTOR RESISTOR ................ 129 . Removal and Installation for Front Evaporator .... 147 .
Removal and Installation ..................................... 129 . REMOVAL ........................................................ 147 .
REMOVAL ........................................................ 129 . INSTALLATION ................................................ 148 .
INSTALLATION ................................................ 129 . Removal and Installation for Rear Evaporator ..... 148 . MTC
REAR BLOWER MOTOR RESISTOR .................. 130 . REMOVAL ........................................................ 149 .
Removal and Installation ..................................... 130 . INSTALLATION ................................................ 149 .
REMOVAL ........................................................ 130 . Removal and Installation for Front Expansion Valve 149 . K
INSTALLATION ................................................ 130 . REMOVAL ........................................................ 149 .
DUCTS AND GRILLES ......................................... 131 . INSTALLATION ................................................ 149 .
Components ........................................................ 131. Removal and Installation for Rear Expansion Valve 149 . L
Removal and Installation ..................................... 134 . REMOVAL ........................................................ 149 .
CENTER CONSOLE HEAT DUCT AND REAR INSTALLATION ................................................ 150 .
FINISHER ASSEMBLY GRILLE ...................... 134 . Checking for Refrigerant Leaks ........................... 150 .
DEFROSTER NOZZLE .................................... 134 . Checking System for Leaks Using the Fluorescent M
RH AND LH SIDE DEMISTER DUCT .............. 134 . Dye Leak Detector ............................................... 150 .
RH AND LH VENTILATOR DUCT .................... 134 . Dye Injection ........................................................ 150
.
CENTER VENTILATOR DUCT ........................ 134 . Electronic Refrigerant Leak Detector ................... 151 .
FLOOR DUCT .................................................. 134 . PRECAUTIONS FOR HANDLING LEAK
REAR OVERHEAD DUCTS ............................. 134 . DETECTOR ...................................................... 151 .
REAR FLOOR DUCT ....................................... 135 . CHECKING PROCEDURE .............................. 152 .
GRILLES .......................................................... 135. SERVICE DATA AND SPECIFICATIONS (SDS) ... 154 .
REFRIGERANT LINES .......................................... 136 . Service Data and Specifications (SDS) ............... 154 .
HFC-134a (R-134a) Service Procedure .............. 136 . COMPRESSOR ............................................... 154 .
SETTING OF SERVICE TOOLS AND EQUIP- LUBRICANT ..................................................... 154 .
MENT ............................................................... 136
. REFRIGERANT ................................................ 154 .
Components ........................................................ 138. ENGINE IDLING SPEED ................................. 154 .
Removal and Installation for Compressor ........... 140 . BELT TENSION ................................................ 154 .
Revision: January 2005 MTC-3 2004 Pathfinder Armada
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS00274
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along
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
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:
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.
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.
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.
Precautions for Working with HFC-134a (R-134a) EJS00275
WARNING:
q CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants
are mixed compressor failure is likely to occur. Refer to MTC-4, "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.
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-
lowing handling precautions must be observed:
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