Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Titan 2004-2009 Approved Nissan Titan 2007 MTC
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J AIR CONDITIONER
A
SECTION
MANUAL AIR CONDITIONER
MTC B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 4 . Description ............................................................. 23
. F
Precautions for Supplemental Restraint System Operation ............................................................... 23
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- AIR MIX DOOR CONTROL ................................ 23 .
SIONER" ................................................................. 4. BLOWER SPEED CONTROL ............................ 23 . G
Precautions for Working with HFC-134a (R-134a) 4 ..... INTAKE DOORS CONTROL .............................. 23 .
Contaminated Refrigerant ....................................... 4 . MODE DOOR CONTROL .................................. 23 .
General Refrigerant Precautions ............................. 5 . DEFROSTER DOOR CONTROL ....................... 23 .
H
Precautions for Leak Detection Dye ........................ 5 . MAGNET CLUTCH CONTROL .......................... 23 .
A/C Identification Label ........................................... 5 . Description of Control System ............................... 25 .
Precautions for Refrigerant Connection .................. 6 . Control Operation .................................................. 25
.
FEATURES OF NEW TYPE REFRIGERANT TEMPERATURE CONTROL DIAL (TEMPERA- I
CONNECTION ..................................................... 6 . TURE CONTROL) .............................................. 26 .
O-RING AND REFRIGERANT CONNECTION ..... 7 RECIRCULATION () SWITCH ............................ 26 .
Precautions for Servicing Compressor .................... 9 . REAR WINDOW DEFOGGER SWITCH (CREW MTC
Precautions for Service Equipment ......................... 9 . CAB) ................................................................... 26
.
RECOVERY/RECYCLING EQUIPMENT ............. 9 . OFF SWITCH (BLOWER SPEED SET TO 0) .... 26 .
ELECTRONIC LEAK DETECTOR ....................... 9 . A/C SWITCH ...................................................... 26 .
K
VACUUM PUMP ................................................ 10 . MODE CONTROL DIAL ..................................... 26 .
MANIFOLD GAUGE SET ................................... 10 . FRONT BLOWER CONTROL DIAL ................... 26 .
SERVICE HOSES .............................................. 10 . Discharge Air Flow ................................................ 26.
SERVICE COUPLERS ........................................11 . System Description ................................................ 27. L
REFRIGERANT WEIGHT SCALE ......................11 . SWITCHES AND THEIR CONTROL FUNCTION 27 ...
CHARGING CYLINDER ......................................11 . CAN Communication System Description ............. 28 .
PREPARATION ........................................................ 12 . TROUBLE DIAGNOSIS ........................................... 29 . M
Special Service Tools ............................................ 12 . CONSULT-II Function (HVAC) ............................... 29 .
HFC-134a (R-134a) Service Tools and Equipment 12 ... CONSULT-II START PROCEDURE ................... 29 .
Commercial Service Tools ..................................... 15 . SELF-DIAGNOSIS ............................................. 29 .
REFRIGERATION SYSTEM .................................... 16 . DATA MONITOR ................................................ 29 .
Refrigerant Cycle .................................................. 16 . CONSULT-II Function (BCM) ................................ 30 .
REFRIGERANT FLOW ...................................... 16 . CONSULT-II START PROCEDURE ................... 30 .
Refrigerant System Protection .............................. 16 . DATA MONITOR ................................................ 30 .
REFRIGERANT PRESSURE SENSOR ............ 16 . How to Perform Trouble Diagnosis for Quick and
PRESSURE RELIEF VALVE .............................. 17 . Accurate Repair ..................................................... 30
.
Component Layout ................................................ 18 . WORK FLOW ..................................................... 30 .
REFRIGERATION SYSTEM .............................. 18 . SYMPTOM TABLE ............................................. 30 .
OIL ........................................................................... 20
. Component Parts and Harness Connector Location 32 ...
Maintenance of Oil Quantity in Compressor ......... 20 . ENGINE COMPARTMENT ................................. 32 .
OIL ..................................................................... 20
. PASSENGER COMPARTMENT ........................ 33 .
CHECKING AND ADJUSTING .......................... 20 . Schematic .............................................................. 34
.
AIR CONDITIONER CONTROL .............................. 23 . Wiring Diagram -- A/C,M -- .................................. 35 .
Revision: August 2006 MTC-1 2007 Titan
Front Air Control Terminals and Reference Values... 41 SURE ..................................................................84
.
FRONT AIR CONTROL HARNESS CONNEC- Insufficient Heating ................................................87 .
TOR TERMINAL LAYOUT .................................. 41 . INSPECTION FLOW ...........................................87 .
TERMINALS AND REFERENCE VALUES FOR Noise ......................................................................89
.
FRONT AIR CONTROL ...................................... 41 . INSPECTION FLOW ...........................................89 .
Operational Check ................................................. 43 . Water Valve Circuit .................................................90 .
CHECKING BLOWER ........................................ 43 . COMPONENT DESCRIPTION ...........................90 .
CHECKING DISCHARGE AIR ........................... 43 . DIAGNOSTIC PROCEDURE FOR WATER
CHECKING RECIRCULATION (, ONLY) ............ 43 . VALVE .................................................................90
.
CHECKING TEMPERATURE DECREASE ........ 43 . Intake Sensor Circuit ..............................................92 .
CHECKING TEMPERATURE INCREASE ......... 43 . COMPONENT DESCRIPTION ...........................92 .
CHECK A/C SWITCH ......................................... 43 . DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
Power Supply and Ground Circuit for Front Air Con- SOR ....................................................................92
.
trol .......................................................................... 44
. COMPONENT INSPECTION ..............................93 .
INSPECTION FLOW .......................................... 44 . CONTROL UNIT .......................................................94 .
COMPONENT DESCRIPTION ........................... 45 . Removal and Installation ........................................94 .
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 45 ... REMOVAL ...........................................................94 .
Mode Door Motor Circuit ....................................... 47 . INSTALLATION ...................................................94 .
INSPECTION FLOW .......................................... 47 . INTAKE SENSOR .....................................................95 .
SYSTEM DESCRIPTION ................................... 47 . Removal and Installation ........................................95 .
COMPONENT DESCRIPTION ........................... 48 . REMOVAL ...........................................................95 .
DIAGNOSTIC PROCEDURE FOR MODE INSTALLATION ...................................................95 .
DOOR MOTOR .................................................. 48 . BLOWER MOTOR ....................................................96 .
Air Mix Door Motor Circuit ..................................... 52 . Removal and Installation ........................................96 .
INSPECTION FLOW .......................................... 52 . REMOVAL ...........................................................96 .
SYSTEM DESCRIPTION ................................... 53 . INSTALLATION ...................................................96 .
COMPONENT DESCRIPTION ........................... 53 . IN-CABIN MICROFILTER .........................................97 .
DIAGNOSTIC PROCEDURE FOR AIR MIX Removal and Installation ........................................97 .
DOOR MOTOR (FRONT) ................................... 53 . FUNCTION .........................................................97 .
Intake Door Motor Circuit ....................................... 57 . REPLACEMENT TIMING ...................................97 .
INSPECTION FLOW .......................................... 57 . REPLACEMENT PROCEDURE .........................97 .
SYSTEM DESCRIPTION ................................... 58 . HEATER & COOLING UNIT ASSEMBLY ................99 .
COMPONENT DESCRIPTION ........................... 58 . Removal and Installation ........................................99 .
DIAGNOSTIC PROCEDURE FOR INTAKE REMOVAL ...........................................................99 .
DOOR MOTOR .................................................. 59 . INSTALLATION ................................................. 100 .
Defroster Door Motor Circuit .................................. 61 . HEATER CORE ...................................................... 101 .
SYMPTOM: ......................................................... 61 . Removal and Installation ...................................... 101 .
INSPECTION FLOW .......................................... 61 . REMOVAL ......................................................... 102 .
SYSTEM DESCRIPTION ................................... 62 . INSTALLATION ................................................. 102 .
COMPONENT DESCRIPTION ........................... 62 . DEFROSTER DOOR MOTOR ................................ 103 .
DIAGNOSTIC PROCEDURE FOR Removal and Installation ...................................... 103 .
DEFROSTER DOOR MOTOR ........................... 62 . REMOVAL ......................................................... 103 .
Front Blower Motor Circuit ..................................... 66 . INSTALLATION ................................................. 103 .
INSPECTION FLOW .......................................... 66 . INTAKE DOOR MOTOR ......................................... 104 .
SYSTEM DESCRIPTION ................................... 67 . Removal and Installation ...................................... 104 .
COMPONENT DESCRIPTION ........................... 67 . REMOVAL ......................................................... 104 .
DIAGNOSTIC PROCEDURE FOR BLOWER INSTALLATION ................................................. 104 .
MOTOR .............................................................. 68 . MODE DOOR MOTOR ........................................... 105 .
COMPONENT INSPECTION ............................. 72 . Removal and Installation ...................................... 105 .
Magnet Clutch Circuit ............................................ 73 . REMOVAL ......................................................... 105 .
INSPECTION FLOW .......................................... 73 . INSTALLATION ................................................. 105 .
SYSTEM DESCRIPTION ................................... 74 . AIR MIX DOOR MOTOR ........................................ 106 .
DIAGNOSTIC PROCEDURE FOR MAGNET Removal and Installation ...................................... 106 .
CLUTCH ............................................................. 74 . REMOVAL ......................................................... 106 .
Insufficient Cooling ................................................ 79 . INSTALLATION ................................................. 106 .
INSPECTION FLOW .......................................... 79 . VARIABLE BLOWER CONTROL .......................... 107 .
PERFORMANCE TEST DIAGNOSES ............... 81 . Removal and Installation ...................................... 107 .
PERFORMANCE CHART .................................. 83 . REMOVAL ......................................................... 107 .
TROUBLE DIAGNOSES FOR UNUSUAL PRES- INSTALLATION ................................................. 107 .
Revision: August 2006 MTC-2 2007 Titan
DUCTS AND GRILLES ......................................... 108 . Removal and Installation for Low-pressure Pipe . 119
Removal and Installation ..................................... 108 . REMOVAL ........................................................ 119 . A
DEFROSTER NOZZLE .................................... 109 . INSTALLATION ................................................ 119 .
RH AND LH SIDE DEMISTER DUCT .............. 109 . Removal and Installation for Refrigerant Pressure
RH AND LH VENTILATOR DUCT .................... 109 . Sensor ................................................................. 119
. B
CENTER VENTILATOR DUCT .........................110 . REMOVAL ........................................................ 119 .
FLOOR DUCT ...................................................110 . INSTALLATION ................................................ 119 .
GRILLES ...........................................................110 . Removal and Installation for Condenser ............. 120 .
REFRIGERANT LINES ........................................... 111 . REMOVAL ........................................................ 120 . C
HFC-134a (R-134a) Service Procedure ............... 111 . INSTALLATION ................................................ 120 .
SETTING OF SERVICE TOOLS AND EQUIP- Removal and Installation for Evaporator ............. 121 .
MENT ................................................................ 111
. REMOVAL ........................................................ 121 . D
Components .........................................................113 . INSTALLATION ................................................ 122 .
Removal and Installation for Compressor ............114 . Removal and Installation for Expansion Valve ..... 122 .
REMOVAL .........................................................114 . REMOVAL ........................................................ 122 . E
INSTALLATION .................................................115 . INSTALLATION ................................................ 122 .
Removal and Installation for Compressor Clutch ..115 Checking for Refrigerant Leaks ........................... 122 .
REMOVAL .........................................................115 . PRELIMINARY CHECK .................................... 122 .
INSPECTION ....................................................116 . Checking System for Leaks Using the Fluorescent F
INSTALLATION .................................................117 . Dye Leak Detector ............................................... 122 .
BREAK-IN OPERATION ...................................118 . Dye Injection ........................................................ 123
.
Removal and Installation for Low-pressure Flexible Electronic Refrigerant Leak Detector ................... 123 . G
Hose .....................................................................118
. PRECAUTIONS FOR HANDLING LEAK
REMOVAL .........................................................118 . DETECTOR ...................................................... 123 .
INSTALLATION .................................................118 . CHECKING PROCEDURE .............................. 124 . H
Removal and Installation for High-pressure Flexible SERVICE DATA AND SPECIFICATIONS (SDS) ... 126 .
Hose .....................................................................118
. Service Data and Specifications (SDS) ............... 126 .
REMOVAL .........................................................118 . COMPRESSOR ............................................... 126 .
I
INSTALLATION .................................................118 . OIL .................................................................... 126
.
Removal and Installation for High-pressure Pipe ..119 REFRIGERANT ................................................ 126 .
REMOVAL .........................................................119 . ENGINE IDLING SPEED ................................. 126 .
INSTALLATION .................................................119 . BELT TENSION ................................................ 126 . MTC
K
L
M
Revision: August 2006 MTC-3 2007 Titan
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS0031M
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:
G 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.
G 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.
G 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) EJS0031N
WARNING:
G 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 recovery/recycling
equipment and refrigerant identifier.
G 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.
G The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following
handling precautions must be observed:
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