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STARTING & CHARGING SYSTEM

K ELECTRICAL

B
SECTION
STARTING & CHARGING SYSTEM C

E
CONTENTS
PRECAUTIONS ......................................................... 3 . INSTALLATION .................................................. 19 . F
Precautions for Supplemental Restraint System Removal and Installation [VQ35DE Engine Models
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- (AWD)] ................................................................... 20
.
SIONER" ................................................................. 3
. REMOVAL .......................................................... 20 . G
PREPARATION .......................................................... 4. INSTALLATION .................................................. 20 .
Special Service Tools .............................................. 4 . Disassembly and Assembly ................................... 21 .
Commercial Service Tools ....................................... 4 . VK45DE ENGINE MODELS (M002T85075) ...... 21 .
H
BATTERY ................................................................... 5
. VQ35DE ENGINE MODELS (2WD) (S114-880) 22 ...
How to Handle Battery ............................................ 5 . VQ35DE ENGINE MODELS (AWD) (S114-881) 23 ...
METHODS OF PREVENTING OVER-DIS- Inspection After Disassembly ................................ 23 .
CHARGE .............................................................. 5
. PINION/CLUTCH CHECK .................................. 23 . I
CHECKING ELECTROLYTE LEVEL ................... 6 . CHARGING SYSTEM .............................................. 24 .
SPECIFIC GRAVITY CHECK .............................. 6 . System Description ................................................ 24 .
CHARGING THE BATTERY ................................ 7 . MALFUNCTION INDICATOR ............................. 24 . J
Trouble Diagnosis with Battery/Starting/Charging Wiring Diagram -- CHARGE -- ............................ 25 .
System Tester (Battery) ........................................... 8 . VK45DE ENGINE MODELS ............................... 25 .
DIAGNOSTIC RESULT ITEM CHART ................. 9 . VQ35DE ENGINE MODELS .............................. 26 .
SC
Removal and Installation ....................................... 10 . Trouble Diagnosis with Battery/Starting/Charging
REMOVAL .......................................................... 10. System Tester (Charging) ...................................... 27 .
INSTALLATION .................................................. 10 . DIAGNOSTIC RESULT ITEM CHART ............... 28 .
STARTING SYSTEM ................................................11 . WORK FLOW ..................................................... 29 . L
System Description ................................................11 . PRELIMINARY INSPECTION ............................ 30 .
Wiring Diagram -- START -- ................................ 12 . DIAGNOSTIC PROCEDURE 1 .......................... 31 .
VK45DE ENGINE MODELS .............................. 12 . DIAGNOSTIC PROCEDURE 2 .......................... 32 . M
VQ35DE ENGINE MODELS .............................. 13 . DIAGNOSTIC PROCEDURE 3 .......................... 32 .
Trouble Diagnosis with Battery/Starting/Charging DIAGNOSTIC PROCEDURE 4 .......................... 33 .
System Tester (Starting) ........................................ 14 . Removal and Installation (VK45DE Engine Models) 34 ...
DIAGNOSTIC RESULT ITEM CHART ............... 14 . REMOVAL .......................................................... 34 .
WORK FLOW ..................................................... 15 . ALTERNATOR PULLEY INSPECTION .............. 35 .
DIAGNOSTIC PROCEDURE 1 .......................... 16 . INSTALLATION .................................................. 35 .
DIAGNOSTIC PROCEDURE 2 .......................... 17 . Removal and Installation (VQ35DE Engine Models) 35 ...
MINIMUM SPECIFICATION OF CRANKING REMOVAL .......................................................... 35 .
VOLTAGE REFERENCING COOLANT TEM- ALTERNATOR PULLEY INSPECTION .............. 36 .
PERATURE ........................................................ 17 . INSTALLATION .................................................. 36 .
Removal and Installation (VK45DE Engine Models) 18 ... Disassembly and Assembly ................................... 37 .
REMOVAL .......................................................... 18. VK45DE ENGINE MODELS (LR1110-716V) ...... 37 .
INSTALLATION .................................................. 18 . VQ35DE ENGINE MODELS (A3TG0191) ......... 38 .
Removal and Installation [VQ35DE Engine Models SERVICE DATA AND SPECIFICATIONS (SDS) ..... 39 .
(2WD)] ................................................................... 19
. Battery ................................................................... 39
.
REMOVAL .......................................................... 19.

Revision: 2006 July SC-1 2007 FX35/FX45
Starter .................................................................... 39
.
Alternator ............................................................... 39
.

Revision: 2006 July SC-2 2007 FX35/FX45
PRECAUTIONS

PRECAUTIONS PFP:00001
A
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 B
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 C
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: D
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. E
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. F
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.
G

Revision: 2006 July SC-3 2007 FX35/FX45
PREPARATION

PREPARATION PFP:00002

Special Service Tools NKS002UL

Tool number
Description
Tool name

J-44373 Model 620
Battery/Starting/Charging system
tester

SEL403X

Commercial Service Tools NKS002UM

Tool number
Description
Tool name

Power tool Loosening bolts and nuts

PBIC0190E

Revision: 2006 July SC-4 2007 FX35/FX45
BATTERY

BATTERY PFP:AYBGL
A
How to Handle Battery NKS002UN

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

MEL040F

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

J
ELA0349D

q Check the charge condition of the battery. SC
Periodically check the specific gravity of the electrolyte. Keep a
close check on charge condition to prevent over-discharge.
L

MEL042F

Revision: 2006 July SC-5 2007 FX35/FX45
BATTERY

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

MEL043F

Sulphation
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
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.
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.
PKIA2353E

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

MEL042FA

Hydrometer Temperature Correction
Battery electrolyte temperature

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