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K ELECTRICAL

STARTING & CHARGING SYSTEM
SECTION SC B

E
CONTENTS
PRECAUTIONS ......................................................... 2 . WORK FLOW ..................................................... 13 . F
Precautions for Supplemental Restraint System DIAGNOSTIC PROCEDURE 1 .......................... 14 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- DIAGNOSTIC PROCEDURE 2 .......................... 15 .
SIONER" ................................................................. 2. MINIMUM SPECIFICATION OF CRANKING G
PREPARATION .......................................................... 3 . VOLTAGE REFERENCING COOLANT TEM-
Special Service Tool ................................................ 3 . PERATURE ........................................................ 16 .
Commercial Service Tools ....................................... 3 . Removal and Installation ....................................... 16 .
H
BATTERY ................................................................... 4
. REMOVAL .......................................................... 16 .
How to Handle Battery ............................................ 4 . INSTALLATION .................................................. 17 .
METHODS OF PREVENTING OVER-DIS- CHARGING SYSTEM .............................................. 18 .
CHARGE .............................................................. 4 . System Description ................................................ 18 . I
CHECKING ELECTROLYTE LEVEL ................... 4 . Wiring Diagram -- CHARGE -- ............................ 19 .
SPECIFIC GRAVITY CHECK .............................. 5 . Trouble Diagnoses with Battery/Starting/Charging
CHARGING THE BATTERY ................................ 6 . System Tester ........................................................ 20. J
Trouble Diagnoses with Battery/Starting/Charging DIAGNOSTIC RESULT ITEM CHART ............... 21 .
System Tester ......................................................... 6 . WORK FLOW ..................................................... 22 .
DIAGNOSTIC RESULT ITEM CHART ................. 8 . DIAGNOSTIC PROCEDURE 1 .......................... 23 .
SC
Removal and Installation ......................................... 9 . DIAGNOSTIC PROCEDURE 2 .......................... 24 .
REMOVAL ............................................................ 9 . DIAGNOSTIC PROCEDURE 3 .......................... 25 .
INSTALLATION .................................................... 9 . MALFUNCTION INDICATOR ............................. 26 .
STARTING SYSTEM ............................................... 10 . Removal and Installation ....................................... 26 . L
System Description ............................................... 10 . REMOVAL .......................................................... 26 .
........................................................................... 10
. INSTALLATION .................................................. 26 .
Wiring Diagram -- START -- .................................11 . SERVICE DATA AND SPECIFICATIONS (SDS) ..... 27 . M
Trouble Diagnoses with Battery/Starting/Charging Battery ................................................................... 27
.
System Tester ....................................................... 12 . Starter .................................................................... 27
.
DIAGNOSTIC RESULT ITEM CHART ............... 12 . Generator .............................................................. 27
.

Revision: March 2006 SC-1 2007 Quest
PRECAUTIONS

PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS00FA4

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: March 2006 SC-2 2007 Quest
PREPARATION

PREPARATION PFP:00002
A
Special Service Tool EKS00FA6

Tool number
Description
Tool name B
J-44373 Model 620
Battery/Starting/Charging system
tester
C

Tests batteries, starting and charging sys- D
SEL403X tems.

F
(J-48087) Tests and charges batteries
Battery Service Center

WKIA5280E H

Commercial Service Tools EKS00FA7

Tool number I
Description
Tool name
Power tool Loosening bolts and nuts
J

PBIC0190E

Revision: March 2006 SC-3 2007 Quest
BATTERY

BATTERY PFP:AYBGL

How to Handle Battery EKS00FA8

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: March 2006 SC-4 2007 Quest
BATTERY

G Remove the cell plug using a suitable tool.
G Add distilled water up to the MAX level. A

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. As shown in the figure, less current
and higher voltage are observed in the initial stage of charging F
sulfated batteries.
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

SC
MEL042FA

Hydrometer Temperature Correction
L
Battery electrolyte temperature

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