Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Sentra 2006-2009 Approved Nissan Sentra 2008 MTC

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MTC

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AIR CONDITIONER

SECTION
MANUAL AIR CONDITIONER
MTC B

E
CONTENTS
SERVICE INFORMATION ........................... 3
. Schematic ...............................................................31
. F
Wiring Diagram - HEATER - ...................................32 .
PRECAUTIONS .................................................. 3
. Wiring Diagram - A/C,M - .......................................34 .
Precaution for Supplemental Restraint System Front Air Control Terminal and Reference Value ....36 G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Operational Check ..................................................38 .
SIONER" .................................................................. 3
. Power Supply and Ground Circuit for Front Air
Precaution for Working with HFC-134a (R-134a)...... 3 Control ....................................................................39
.
H
Contaminated Refrigerant ........................................ 3 . LAN System Circuit ................................................41 .
General Refrigerant Precaution ............................... 4 . Mode Door Motor Circuit ........................................43 .
Precaution for Leak Detection Dye .......................... 4 . Air Mix Door Motor Circuit ......................................45 .
A/C Identification Label ............................................ 4
. Intake Door Motor Circuit ........................................47 . I
Precaution for Refrigerant Connection ..................... 4 . Blower Motor Circuit ...............................................48 .
Precaution for Service of Compressor ..................... 9 . Magnet Clutch Circuit .............................................53 .
Precaution for Service Equipment ............................ 9 . Insufficient Cooling .................................................56. MTC
Insufficient Heating .................................................63.
PREPARATION .................................................12
. Noise ......................................................................64
.
Special Service Tool .............................................. 12
.
HFC-134a (R-134a) Service Tool and Equipment 12 .... CONTROL UNIT ................................................ 66 K
Commercial Service Tool ....................................... 14
. Removal and Installation ........................................66
.
REFRIGERATION SYSTEM .............................16
. FRONT BLOWER MOTOR ............................... 67 L
Refrigerant Cycle ................................................... 16
. Removal and Installation ........................................67
.
Refrigerant System Protection ............................... 16 .
Component Part Location ...................................... 17. IN-CABIN MICROFILTER ................................. 68
Removal and Installation ........................................68
. M
OIL .....................................................................18
.
Maintenance of Oil Quantity in Compressor .......... 18
. HEATER & COOLING UNIT ASSEMBLY ........ 70
Removal and Installation ........................................70
. N
AIR CONDITIONER CONTROL ........................21
.
Overview Air Conditioner LAN Control System ...... 21 . HEATER CORE ................................................. 72
System Construction .............................................. 21
. Removal and Installation ........................................72
.
Overview of Control system ................................... 23. O
Control Operation ................................................... 24
.
INTAKE DOOR MOTOR ................................... 73
Removal and Installation ........................................73
.
Discharge Air Flow ................................................. 25
.
System Description ................................................ 25
. MODE DOOR MOTOR ...................................... 74 P
CAN Communication System Description .............. 26 . Removal and Installation ........................................74
.
TROUBLE DIAGNOSIS ....................................27
. AIR MIX DOOR MOTOR ................................... 75
How to Perform Trouble Diagnosis for Quick and Removal and Installation ........................................75
.
Accurate Repair ..................................................... 27 .
Component Parts and Harness Connector Loca- FAN CONTROL AMPLIFIER ............................ 76
tion ......................................................................... 27
. Removal and Installation ........................................76
.

Revision: July 2007 MTC-1 2008 Sentra
DUCTS AND GRILLES ..................................... 77
. Removal and Installation for High-pressure Flexi-
Removal and Installation ....................................... 77
. ble Hose ................................................................. 92
.
Removal and Installation for High-pressure Pipe ... 93
REFRIGERANT LINES ..................................... 81
. Removal and Installation for Refrigerant Pressure
HFC-134a (R-134a) Service Procedure ................ 81 . Sensor .................................................................... 93
.
Component ............................................................ 83
. Removal and Installation for Condenser ................ 93 .
Removal and Installation for Compressor - Removal and Installation for Evaporator ................ 94 .
MR20DE ................................................................ 85
. Removal and Installation for Expansion Valve ....... 95 .
Removal and Installation for Compressor - Checking of Refrigerant Leaks ............................... 95 .
QR25DE ................................................................ 86
. Checking System for Leaks Using the Fluorescent
Removal and Installation for Compressor Clutch - Leak Detector ......................................................... 96
.
MR20DE ................................................................ 86
. Dye Injection .......................................................... 96
.
Removal and Installation for Compressor Clutch - Electronic Refrigerant Leak Detector ..................... 96 .
QR25DE ................................................................ 89
.
Removal and Installation for Low-Pressure Flexi- SERVICE DATA AND SPECIFICATIONS
ble Hose and Muffler Pipe ..................................... 92 . (SDS) ................................................................ 99
.
Service Data and Specification (SDS) ................... 99
.

Revision: July 2007 MTC-2 2008 Sentra
PRECAUTIONS
< SERVICE INFORMATION >
SERVICE INFORMATION A
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT B
PRE-TENSIONER" INFOID:0000000001851768

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along C
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. D
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING: E

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