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>> Download SC documenatation <<Text preview - extract from the documentK ELECTRICAL
A
STARTING & CHARGING SYSTEM
SECTION SC B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 2
. DIAGNOSTIC PROCEDURE 1 .......................... 20 . F
Precautions for Supplemental Restraint System DIAGNOSTIC PROCEDURE 2 .......................... 21 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- MINIMUM SPECIFICATION OF CRANKING
SIONER" ................................................................. 2
. VOLTAGE REFERENCING COOLANT TEM- G
PREPARATION .......................................................... 3
. PERATURE ........................................................ 22 .
Special Service Tool ................................................ 3
. Removal and Installation MR20DE ........................ 23 .
Commercial Service Tools ....................................... 3 . REMOVAL .......................................................... 23 .
H
BATTERY ................................................................... 4
. INSTALLATION .................................................. 23 .
How to Handle Battery ............................................ 4 . Removal and Installation QR25DE ........................ 24 .
METHODS OF PREVENTING OVER-DIS- REMOVAL .......................................................... 24 .
CHARGE .............................................................. 4
. INSTALLATION .................................................. 24 . I
CHECKING ELECTROLYTE LEVEL ................... 4 . CHARGING SYSTEM .............................................. 25 .
SPECIFIC GRAVITY CHECK .............................. 5 . System Description ................................................ 25 .
CHARGING THE BATTERY ................................ 6 . Wiring Diagram -- CHARGE -- ............................ 26 . J
Trouble Diagnoses with Battery Service Center ...... 6 . MR20DE ............................................................. 26.
Removal and Installation MR20DE ......................... 7 . QR25DE ............................................................. 27.
REMOVAL MR20DE ............................................ 7 . Trouble Diagnoses with Starting/Charging System
SC
INSTALLATION .................................................... 7. Tester (Charging) ................................................... 28 .
Removal and Installation QR25DE ......................... 7 . DIAGNOSTIC PROCEDURE 1 .......................... 29 .
REMOVAL ............................................................ 7
. DIAGNOSTIC PROCEDURE 2 .......................... 30 .
INSTALLATION .................................................... 7. DIAGNOSTIC PROCEDURE 3 .......................... 31 . L
STARTING SYSTEM ................................................. 8 . Removal and Installation MR20DE ........................ 32 .
System Description ................................................. 8
. REMOVAL .......................................................... 32 .
M/T MODELS WITH MR20DE ............................. 8 . INSTALLATION .................................................. 32 . M
M/T MODELS WITH QR25DE ............................. 8 . Removal and Installation QR25DE ........................ 33 .
CVT MODELS WITH MR20DE ............................ 9 . REMOVAL .......................................................... 33 .
CVT MODELS WITH QR25DE ............................ 9 . INSTALLATION .................................................. 33 .
Wiring Diagram -- START -- .................................11 . Generator Pulley Inspection .................................. 33 .
M/T MODELS - MR20DE ....................................11 . GENERATOR PULLEY INSPECTION ............... 33 .
M/T MODELS - QR25DE ................................... 13 . SERVICE DATA AND SPECIFICATIONS (SDS) ..... 35 .
CVT MODELS - MR20DE .................................. 15 . Battery ................................................................... 35
.
CVT MODELS - QR25DE .................................. 17 . Starter .................................................................... 35
.
Trouble Diagnoses with Starting/Charging System Alternator ............................................................... 35
.
Tester (Starting) ..................................................... 19
.
Revision: December 2006 SC-1 2007 Sentra
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS00JLT
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.
Revision: December 2006 SC-2 2007 Sentra
PREPARATION
PREPARATION PFP:00002
A
Special Service Tool EKS00JLU
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number Description B
(Kent-Moore No.)
Tool name
-- Tests battery. C
(J-48087) For operating instructions, refer to Technical
Battery Service Center Service Bulletin and Battery Service Center
User Guide.
D
WKIA5280E
E
--
(J-44373) Model 620
Starting/Charging System Tester
F
Tests starting and charging systems.
SEL403X
For operating instructions, refer to Technical G
Service Bulletin.
H
I
Commercial Service Tools EKS00JLV
Tool name Description
Power tool Loosening bolts and nuts J
SC
PBIC0190E
L
M
Revision: December 2006 SC-3 2007 Sentra
BATTERY
BATTERY PFP:AYBGL
How to Handle Battery EKS00JLW
CAUTION:
G If it becomes necessary to start the engine with a booster battery and jumper cables, use a 12-volt
booster battery.
G After connecting battery cables, ensure that they are tightly clamped to battery terminals for good
contact.
G Never add distilled water through the hole used to check specific gravity.
METHODS OF PREVENTING OVER-DISCHARGE
The following precautions must be taken to prevent over-discharging
a battery.
G The battery surface (particularly its top) should always be kept
clean and dry.
G The terminal connections should be clean and tight.
G At every routine maintenance, check the electrolyte level.
This also applies to batteries designated as "low maintenance"
and "maintenance-free".
MEL040F
G When the vehicle is not going to be used over a long period of
time, disconnect the negative battery terminal.
MEL041F
G Check the charge condition of the battery.
Periodically check the specific gravity of the electrolyte. Keep a
close check on charge condition to prevent over-discharge.
MEL042F
CHECKING ELECTROLYTE LEVEL
WARNING:
Do not allow battery fluid to come in contact with skin, eyes, fabrics, or painted surfaces. After touch-
ing a battery, do not touch or rub your eyes until you have thoroughly washed your hands. If acid con-
tacts eyes, skin or clothing, immediately flush with water for 15 minutes and seek medical attention.
Revision: December 2006 SC-4 2007 Sentra
BATTERY
G Remove the cell plug using a suitable tool.
G Add distilled water up to the MAX level. A
B
C
MEL043F
D
Sulfation
A battery will be completely discharged if it is left unattended
for a long time and the specific gravity will become less than
1.100. This may result in sulfation on the cell plates. E
To determine if a battery has been sulfated, note its voltage and
current when charging it. Less current and higher voltage are
observed in the initial stage of charging sulfated batteries, as F
shown.
A sulfated battery may sometimes be brought back into service
by means of a long, slow charge, 12 hours or more, followed by
a battery capacity test. G
WKIA4166E
SPECIFIC GRAVITY CHECK H
1. Read hydrometer and thermometer indications at eye level.
2. Use the following chart to correct your hydrometer reading
according to electrolyte temperature. I
J
SC
MEL042FA
Hydrometer Temperature Correction
L
Battery electrolyte temperature
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