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STARTING & CHARGING SYSTEM

K ELECTRICAL

STARTING & CHARGING SYSTEM
SECTION SC B

E
CONTENTS
PRECAUTIONS ......................................................... 2
. DIAGNOSTIC PROCEDURE 1 .......................... 17 . F
Precautions for Supplemental Restraint System DIAGNOSTIC PROCEDURE 2 .......................... 18 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- MINIMUM SPECIFICATION OF CRANKING
SIONER" ................................................................. 2
. VOLTAGE REFERENCING COOLANT TEM- G
Precautions for Battery Service ............................... 2 . PERATURE ........................................................ 18 .
Wiring Diagrams and Trouble Diagnosis ................. 2 . Removal and Installation ....................................... 19 .
PREPARATION .......................................................... 3
. REMOVAL .......................................................... 19 .
H
Special Service Tools .............................................. 3
. INSTALLATION .................................................. 19 .
Commercial Service Tools ....................................... 3 . Disassembly and Assembly ................................... 20 .
BATTERY ................................................................... 4
. Inspection After Disassembly ................................ 20 .
How to Handle Battery ............................................ 4 . PINION/CLUTCH CHECK .................................. 20 . I
METHODS OF PREVENTING OVER-DIS- CHARGING SYSTEM .............................................. 21 .
CHARGE .............................................................. 4
. System Description ................................................ 21 .
CHECKING ELECTROLYTE LEVEL ................... 5 . Wiring Diagram -- CHARGE -- ............................ 22 . J
SPECIFIC GRAVITY CHECK .............................. 5 . Trouble Diagnosis with Battery/Starting/Charging
CHARGING THE BATTERY ................................ 6 . System Tester ........................................................ 23.
Trouble Diagnoses with Battery/Starting/Charging DIAGNOSTIC RESULT ITEM CHART ............... 24 .
SC
System Tester ......................................................... 6
. WORK FLOW ..................................................... 25 .
DIAGNOSTIC RESULT ITEM CHART ................. 8 . DIAGNOSTIC PROCEDURE 1 .......................... 26 .
Removal and Installation ......................................... 9 . DIAGNOSTIC PROCEDURE 2 .......................... 27 .
REMOVAL ............................................................ 9
. DIAGNOSTIC PROCEDURE 3 .......................... 28 . L
INSTALLATION .................................................... 9. DIAGNOSTIC PROCEDURE 4 .......................... 29 .
STARTING SYSTEM ............................................... 10 . DIAGNOSTIC PROCEDURE 5 .......................... 30 .
System Description ............................................... 10. MALFUNCTION INDICATOR ............................. 30 . M
M/T MODEL ....................................................... 10
. Removal and Installation ....................................... 31 .
A/T MODEL .........................................................11
. REMOVAL .......................................................... 31 .
Wiring Diagram -- START -- ................................ 12 . INSTALLATION .................................................. 32 .
M/T MODEL ....................................................... 12
. Disassembly and Assembly ................................... 33 .
A/T MODEL ........................................................ 14
. SERVICE DATA AND SPECIFICATIONS (SDS) ..... 34 .
Trouble Diagnosis with Battery/Starting/Charging Battery ................................................................... 34
.
System Tester ....................................................... 15
. Starter .................................................................... 34
.
DIAGNOSTIC RESULT ITEM CHART ............... 15 . Alternator ............................................................... 34
.
WORK FLOW ..................................................... 16 .

SC-1
PRECAUTIONS

PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" AKS004VG

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 Battery Service AKS00AUO

Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.
Wiring Diagrams and Trouble Diagnosis AKS003YV

When you read wiring diagrams, refer to the following:
q Refer to GI-15, "How to Read Wiring Diagrams" in GI section.
q Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" for power distribution circuit in PG section.
When you perform trouble diagnosis, refer to the followings:
q Refer to GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" in GI section.
q Refer to GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident" in GI section.

SC-2
PREPARATION

PREPARATION PFP:00002
A
Special Service Tools AKS003YW

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

D
SEL403X

F
Commercial Service Tools AKS003YX

Tool number G
Description
Tool name

Power tool Loosening bolts and nuts
H

PBIC0190E

SC-3
BATTERY

BATTERY PFP:AYBGL

How to Handle Battery AKS003YY

CAUTION:
q If it becomes necessary to start the engine with a booster battery and jumper cables, use a 12-volt
booster battery.
q After connecting battery cables, ensure that they are tightly clamped to battery terminals for good
contact.
METHODS OF PREVENTING OVER-DISCHARGE
The following precautions must be taken to prevent over-discharging
a battery.
q The battery surface (particularly its top) should always be kept
clean and dry.
q The terminal connections should be clean and tight.
q At every routine maintenance, check the electrolyte level.
This also applies to batteries designated as "low maintenance"
and "maintenance-free".

MEL040F

q When the vehicle is not going to be used over a long period of
time, disconnect the negative battery terminal.

MEL041F

q 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

SC-4
BATTERY

CHECKING ELECTROLYTE LEVEL
WARNING: A
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. B
q Remove the cell plug using a suitable tool.
q Add distilled water up to the MAX level.
C

E
MEL043F

Sulphation
F
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 sulphation on the cell plates.
To determine if a battery has been "sulphated", note its voltage G
and current when charging it. As shown in the figure, less cur-
rent and higher voltage are observed in the initial stage of
charging sulphated batteries. H
A sulphated battery may sometimes be brought back into ser-
vice by means of a long, slow charge, 12 hours or more, fol-
lowed by a battery capacity test.
I
PKIA2353E

SPECIFIC GRAVITY CHECK
1. Read hydrometer and thermometer indications at eye level. J
2. Use the chart below to correct your hydrometer reading accord-
ing to electrolyte temperature.
SC

MEL042FA M
Hydrometer Temperature Correction
Battery electrolyte temperature

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