Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Titan 2004-2009 Approved Nissan Titan 2004 MTC
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J AIR CONDITIONER
A
SECTION
MANUAL AIR CONDITIONER
MTC B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 4
. AIR CONDITIONER CONTROL .............................. 22 . F
Precautions for Supplemental Restraint System Description ............................................................. 22
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Operation ............................................................... 22
.
SIONER" ................................................................. 4
. AIR MIX DOOR CONTROL ................................ 22 . G
Precautions for Working with HFC-134a (R-134a) 4 ..... BLOWER SPEED CONTROL ............................ 22 .
Contaminated Refrigerant ....................................... 4 . INTAKE DOORS CONTROL .............................. 22 .
General Refrigerant Precautions ............................. 5 . MODE DOOR CONTROL .................................. 22 .
H
Precautions for Leak Detection Dye ........................ 5 . DEFROSTER DOOR CONTROL ....................... 22 .
A/C Identification Label ........................................... 6
. MAGNET CLUTCH CONTROL .......................... 22 .
Precautions for Refrigerant Connection .................. 6 . SELF-DIAGNOSTIC SYSTEM ........................... 23 .
FEATURES OF NEW TYPE REFRIGERANT Description of Control System ............................... 24 . I
CONNECTION ..................................................... 6. Control Operation .................................................. 24 .
O-RING AND REFRIGERANT CONNECTION ..... 7 DISPLAY SCREEN (IF EQUIPPED) .................. 25 .
Precautions for Servicing Compressor .................... 9 . TEMPERATURE SWITCH (TEMPERATURE MTC
Precautions for Service Equipment ......................... 9 . CONTROL) ......................................................... 25 .
RECOVERY/RECYCLING EQUIPMENT ............. 9 . RECIRCULATION () SWITCH ............................ 25 .
ELECTRONIC LEAK DETECTOR ....................... 9 . OFF SWITCH (BLOWER SPEED SET TO 0) .... 25 .
K
VACUUM PUMP ................................................ 10 . A/C SWITCH ...................................................... 25 .
MANIFOLD GAUGE SET ................................... 10 . MODE SWITCH ................................................. 25 .
SERVICE HOSES .............................................. 10 . FRONT BLOWER SWITCH ............................... 25 .
SERVICE COUPLERS ........................................11 . Discharge Air Flow ................................................ 26 . L
REFRIGERANT WEIGHT SCALE ......................11 . ........................................................................... 26
.
CHARGING CYLINDER ......................................11 . System Description ................................................ 27 .
Wiring Diagrams and Trouble Diagnosis ................11 . SWITCHES AND THEIR CONTROL FUNCTION 27 ... M
PREPARATION ........................................................ 12
. CAN Communication System Description ............. 28 .
Special Service Tools ............................................ 12
. TROUBLE DIAGNOSIS ........................................... 29 .
HFC-134a (R-134a) Service Tools and Equipment 12 ... CONSULT-II ........................................................... 29 .
Commercial Service Tools ..................................... 15 . CONSULT-II BASIC OPERATION ...................... 29 .
REFRIGERATION SYSTEM .................................... 16 . DATA MONITOR ................................................ 30 .
Refrigerant Cycle .................................................. 16
. How to Perform Trouble Diagnosis for Quick and
REFRIGERANT FLOW ...................................... 16 . Accurate Repair ..................................................... 31 .
Refrigerant System Protection .............................. 16 . WORK FLOW ..................................................... 31 .
REFRIGERANT PRESSURE SENSOR ............ 16 . SYMPTOM TABLE ............................................. 31 .
PRESSURE RELIEF VALVE ............................. 17 . Component Parts and Harness Connector Location 32 ...
Component Layout ................................................ 18. ENGINE COMPARTMENT ................................. 32 .
REFRIGERATION SYSTEM .............................. 18 . PASSENGER COMPARTMENT ........................ 33 .
LUBRICANT ............................................................ 20
. Schematic .............................................................. 34.
Maintenance of Lubricant Quantity in Compressor 20 ... Wiring Diagram --A/C-- ........................................ 35 .
LUBRICANT ....................................................... 20
. Front Air Control Terminals and Reference Value... 41
CHECKING AND ADJUSTING .......................... 20 . PIN CONNECTOR TERMINAL LAYOUT ........... 41 .
Revision: January 2005 MTC-1 2004 Titan
TERMINALS AND REFERENCE VALUE FOR TROUBLE DIAGNOSES FOR UNUSUAL PRES-
FRONT AIR CONTROL ...................................... 41 . SURE ..................................................................83
.
A/C System Self-diagnosis Function (With NAVI Insufficient Heating ................................................86 .
Only) ...................................................................... 43
. INSPECTION FLOW ...........................................86 .
DESCRIPTION ................................................... 43 . Noise ......................................................................87
.
Operational Check ................................................. 45 . INSPECTION FLOW ...........................................87 .
CHECKING BLOWER ........................................ 45 . Self-diagnosis ........................................................88.
CHECKING DISCHARGE AIR ........................... 45 . INSPECTION FLOW ...........................................88 .
CHECKING RECIRCULATION ........................... 45 . Water Valve Circuit .................................................89 .
CHECKING TEMPERATURE DECREASE ........ 46 . COMPONENT DESCRIPTION ...........................89 .
CHECKING TEMPERATURE INCREASE ......... 46 . DIAGNOSTIC PROCEDURE FOR WATER
CHECK A/C SWITCH ......................................... 46 . VALVE .................................................................89
.
Power Supply and Ground Circuit for Front Air Con- COMPONENT INSPECTION ..............................91 .
trol .......................................................................... 47
. Intake Sensor Circuit ..............................................91 .
INSPECTION FLOW .......................................... 47 . COMPONENT DESCRIPTION ...........................91 .
COMPONENT DESCRIPTION ........................... 48 . DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 48 ... SOR ....................................................................91
.
Mode Door Motor Circuit ....................................... 50 . COMPONENT INSPECTION ..............................93 .
INSPECTION FLOW .......................................... 50 . CONTROL UNIT .......................................................94 .
SYSTEM DESCRIPTION ................................... 51 . Removal and Installation ........................................94 .
COMPONENT DESCRIPTION ........................... 51 . REMOVAL ...........................................................94 .
DIAGNOSTIC PROCEDURE FOR MODE INSTALLATION ...................................................94 .
DOOR MOTOR .................................................. 51 . INTAKE SENSOR .....................................................95 .
Air Mix Door Motor Circuit ..................................... 54 . Removal and Installation ........................................95 .
INSPECTION FLOW .......................................... 54 . REMOVAL ...........................................................95 .
SYSTEM DESCRIPTION ................................... 55 . INSTALLATION ...................................................95 .
COMPONENT DESCRIPTION ........................... 55 . BLOWER MOTOR ....................................................96 .
DIAGNOSTIC PROCEDURE FOR AIR MIX Removal and Installation ........................................96 .
DOOR MOTOR .................................................. 55 . REMOVAL ...........................................................96 .
Intake Door Motor Circuit ....................................... 58 . INSTALLATION ...................................................96 .
INSPECTION FLOW .......................................... 58 . IN-CABIN MICROFILTER .........................................97 .
SYSTEM DESCRIPTION ................................... 59 . Removal and Installation ........................................97 .
COMPONENT DESCRIPTION ........................... 59 . FUNCTION .........................................................97 .
DIAGNOSTIC PROCEDURE FOR INTAKE REPLACEMENT TIMING ...................................97 .
DOOR MOTOR .................................................. 59 . REPLACEMENT PROCEDURE .........................97 .
Defroster Door Motor Circuit .................................. 61 . HEATER & COOLING UNIT ASSEMBLY ................99 .
SYMPTOM: ......................................................... 61 . Removal and Installation ........................................99 .
INSPECTION FLOW .......................................... 61 . REMOVAL ...........................................................99 .
SYSTEM DESCRIPTION ................................... 62 . INSTALLATION ................................................. 100 .
COMPONENT DESCRIPTION ........................... 62 . HEATER CORE ...................................................... 101 .
DIAGNOSTIC PROCEDURE FOR Removal and Installation ...................................... 101 .
DEFROSTER DOOR MOTOR ........................... 62 . REMOVAL ......................................................... 102 .
Blower Motor Circuit .............................................. 65 . INSTALLATION ................................................. 102 .
INSPECTION FLOW .......................................... 65 . DEFROSTER DOOR MOTOR ................................ 103 .
SYSTEM DESCRIPTION ................................... 66 . Removal and Installation ...................................... 103 .
COMPONENT DESCRIPTION ........................... 66 . REMOVAL ......................................................... 103 .
DIAGNOSTIC PROCEDURE FOR BLOWER INSTALLATION ................................................. 103 .
MOTOR .............................................................. 67 . INTAKE DOOR MOTOR ......................................... 104 .
COMPONENT INSPECTION ............................. 71 . Removal and Installation ...................................... 104 .
Magnet Clutch Circuit ............................................ 73 . REMOVAL ......................................................... 104 .
INSPECTION FLOW .......................................... 73 . INSTALLATION ................................................. 104 .
SYSTEM DESCRIPTION ................................... 74 . MODE DOOR MOTOR ........................................... 105 .
DIAGNOSTIC PROCEDURE FOR MAGNET Removal and Installation ...................................... 105 .
CLUTCH ............................................................. 74 . REMOVAL ......................................................... 105 .
COMPONENT INSPECTION ............................. 78 . INSTALLATION ................................................. 105 .
Insufficient Cooling ................................................ 79 . AIR MIX DOOR MOTOR ........................................ 106 .
INSPECTION FLOW .......................................... 79 . Removal and Installation ...................................... 106 .
PERFORMANCE TEST DIAGNOSES ............... 80 . REMOVAL ......................................................... 106 .
PERFORMANCE CHART .................................. 82 . INSTALLATION ................................................. 106 .
Revision: January 2005 MTC-2 2004 Titan
FRONT BLOWER MOTOR RESISTOR ................ 107 . REMOVAL ........................................................ 119 .
Removal and Installation ..................................... 107 . INSTALLATION ................................................ 119 . A
REMOVAL ........................................................ 107 . Removal and Installation for Low-pressure Pipe . 119
INSTALLATION ................................................ 107 . REMOVAL ........................................................ 119 .
DUCTS AND GRILLES ......................................... 108 . INSTALLATION ................................................ 119 . B
Removal and Installation ..................................... 108 . Removal and Installation for Refrigerant Pressure
DEFROSTER NOZZLE .................................... 109 . Sensor ................................................................. 119
.
RH AND LH SIDE DEMISTER DUCT .............. 109 . REMOVAL ........................................................ 119 .
RH AND LH VENTILATOR DUCT .................... 109 . INSTALLATION ................................................ 119 . C
CENTER VENTILATOR DUCT .........................110 . Removal and Installation for Condenser ............. 119 .
FLOOR DUCT ...................................................110 . REMOVAL ........................................................ 119 .
GRILLES ...........................................................110 . INSTALLATION ................................................ 120 . D
REFRIGERANT LINES ........................................... 111 . Removal and Installation for Front Evaporator .... 121 .
HFC-134a (R-134a) Service Procedure ............... 111 . REMOVAL ........................................................ 121 .
SETTING OF SERVICE TOOLS AND EQUIP- INSTALLATION ................................................ 122 . E
MENT ................................................................ 111
. Removal and Installation for Front Expansion Valve 122 .
Components .........................................................113 . REMOVAL ........................................................ 122 .
Removal and Installation for Compressor ............114 . INSTALLATION ................................................ 122 .
REMOVAL .........................................................114 . Checking for Refrigerant Leaks ........................... 122 . F
INSTALLATION .................................................115 . Checking System for Leaks Using the Fluorescent
Removal and Installation for Compressor Clutch ..115 Dye Leak Detector ............................................... 122 .
REMOVAL .........................................................115 . Dye Injection ........................................................ 123
. G
INSPECTION ....................................................116 . Electronic Refrigerant Leak Detector ................... 123 .
INSTALLATION .................................................117 . PRECAUTIONS FOR HANDLING LEAK
BREAK-IN OPERATION ...................................118 . DETECTOR ...................................................... 123 . H
Removal and Installation for Low-pressure Flexible CHECKING PROCEDURE .............................. 124 .
Hose .....................................................................118
. SERVICE DATA AND SPECIFICATIONS (SDS) ... 126 .
REMOVAL .........................................................118 . Service Data and Specifications (SDS) ............... 126 .
I
INSTALLATION .................................................118 . COMPRESSOR ............................................... 126 .
Removal and Installation for High-pressure Flexible LUBRICANT ..................................................... 126 .
Hose .....................................................................118
. REFRIGERANT ................................................ 126 .
REMOVAL .........................................................118 . ENGINE IDLING SPEED ................................. 126 . MTC
INSTALLATION .................................................118 . BELT TENSION ................................................ 126 .
Removal and Installation for High-pressure Pipe ..119
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M
Revision: January 2005 MTC-3 2004 Titan
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS0028X
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) EJS0028Y
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 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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