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STARTING & CHARGING SYSTEM

K ELECTRICAL

STARTING & CHARGING SYSTEM
SECTION SC B

E
CONTENTS
PRECAUTIONS ......................................................... 2
. VK45DE ENGINE MODELS ............................... 14 . F
Precautions for Supplemental Restraint System VQ35DE ENGINE MODELS (2WD) ................... 15 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- VQ35DE ENGINE MODELS (AWD) ................... 16 .
SIONER" ................................................................. 2
. Disassembly and Assembly ................................... 17 . G
PREPARATION .......................................................... 3
. VK45DE ENGINE MODELS ............................... 17 .
Special Service Tools .............................................. 3
. VQ35DE ENGINE MODELS (2WD) ................... 18 .
Commercial Service Tools ....................................... 3 . VQ35DE ENGINE MODELS (AWD) ................... 19 .
H
BATTERY ................................................................... 4
. INSPECTION AFTER DISASSEMBLY ............... 19 .
How to Handle Battery ............................................ 4 . CHARGING SYSTEM .............................................. 20 .
METHODS OF PREVENTING OVER-DIS- System Description ................................................ 20 .
CHARGE .............................................................. 4
. MALFUNCTION INDICATOR ............................. 20 . I
CHECKING ELECTROLYTE LEVEL ................... 5 . Wiring Diagram -- CHARGE -- ............................ 21 .
SPECIFIC GRAVITY CHECK .............................. 5 . VK45DE ENGINE MODELS ............................... 21 .
CHARGING THE BATTERY ................................ 6 . VQ35DE ENGINE MODELS .............................. 22 . J
Trouble Diagnoses with Battery Service Center ...... 7 . Trouble Diagnosis with Starting/Charging System
Removal and Installation ......................................... 7 . Tester (Charging) ................................................... 23 .
REMOVAL ............................................................ 7
. PRELIMINARY INSPECTION ............................ 24 .
SC
INSTALLATION .................................................... 7. DIAGNOSTIC PROCEDURE 1 .......................... 25 .
STARTING SYSTEM ................................................. 8 . DIAGNOSTIC PROCEDURE 2 .......................... 25 .
System Description ................................................. 8
. DIAGNOSTIC PROCEDURE 3 .......................... 25 .
Wiring Diagram -- START -- .................................. 9 . DIAGNOSTIC PROCEDURE 4 .......................... 26 . L
VK45DE ENGINE MODELS ................................ 9 . Removal and Installation ....................................... 27 .
VQ35DE ENGINE MODELS .............................. 10 . VK45DE ENGINE MODELS ............................... 27 .
Trouble Diagnosis with Starting/Charging System VQ35DE ENGINE MODELS .............................. 28 . M
Tester (Starting) ......................................................11
. Disassembly and Assembly ................................... 30 .
DIAGNOSTIC PROCEDURE 1 .......................... 12 . VK45DE ENGINE MODELS ............................... 30 .
DIAGNOSTIC PROCEDURE 2 .......................... 13 . VQ35DE ENGINE MODELS .............................. 31 .
MINIMUM SPECIFICATION OF CRANKING SERVICE DATA AND SPECIFICATIONS (SDS) ..... 32 .
VOLTAGE REFERENCING COOLANT TEM- Battery ................................................................... 32
.
PERATURE ........................................................ 13
. Starter .................................................................... 32
.
Removal and Installation ....................................... 14 . Alternator ............................................................... 32
.

Revision: 2006 December SC-1 2006 FX35/FX45
PRECAUTIONS

PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" NKS002UK

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.

Revision: 2006 December SC-2 2006 FX35/FX45
PREPARATION

PREPARATION PFP:00002
A
Special Service Tools NKS0056N

Tool number
(Kent-Moore No.) Description B
Tool name

--
(J-48087) C
Battery Service Center Tests battery.
For operating instructions, refer to Technical
Service Bulletin and Battery Service Center
User Guide. D

WKIA5280E

-- E
(J-44373 Model MCR620)
Starting/Charging System Tester

F
Tests starting and charging systems.
SEL403X
For operating instructions, refer to Technical
Service Bulletin. G

Commercial Service Tools NKS0056O
I
Tool name Description

Power tool Loosening bolts, nuts and screws J

PIIB1407E
L

Revision: 2006 December SC-3 2006 FX35/FX45
BATTERY

BATTERY PFP:AYBGL

How to Handle Battery NKS0056P

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 battery cable from the negative terminal.

ELA0349D

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

Revision: 2006 December SC-4 2006 FX35/FX45
BATTERY

CHECKING ELECTROLYTE LEVEL
WARNING: A
Never allow battery fluid to come in contact with skin, eyes, fabrics, or painted surfaces. After touch-
ing a battery, never 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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