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>> Download sc documenatation <<Text preview - extract from the documentSTARTING & CHARGING SYSTEM
K ELECTRICAL
A
STARTING & CHARGING SYSTEM
SECTION SC B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 2
. VOLTAGE REFERENCING COOLANT TEM- F
Precautions for Supplemental Restraint System PERATURE ........................................................ 16 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Removal and Installation ....................................... 17 .
SIONER" ................................................................. 2
. VK45DE ENGINE MODELS ............................... 17 . G
Wiring Diagrams and Trouble Diagnosis ................. 2 . VQ35DE ENGINE MODELS (2WD) ................... 18 .
PREPARATION .......................................................... 3
. VQ35DE ENGINE MODELS (AWD) ................... 19 .
Special Service Tools .............................................. 3
. Disassembly and Assembly ................................... 20 .
H
Commercial Service Tools ....................................... 3 . Inspection After Disassembly ................................ 22 .
BATTERY ................................................................... 4
. PINION/CLUTCH CHECK .................................. 22 .
How to Handle Battery ............................................ 4 . CHARGING SYSTEM .............................................. 23 .
METHODS OF PREVENTING OVER-DIS- System Description ................................................ 23 . I
CHARGE .............................................................. 4
. Wiring Diagram -- CHARGE -- ............................ 24 .
CHECKING ELECTROLYTE LEVEL ................... 5 . VK45DE ENGINE MODELS ............................... 24 .
SPECIFIC GRAVITY CHECK .............................. 5 . VQ35DE ENGINE MODELS .............................. 25 . J
CHARGING THE BATTERY ................................ 6 . Trouble Diagnosis with Battery/Starting/Charging
Trouble Diagnosis with Battery/Starting/Charging System Tester ........................................................ 26.
System Tester ......................................................... 6
. DIAGNOSTIC RESULT ITEM CHART ............... 27 .
SC
DIAGNOSTIC RESULT ITEM CHART ................. 8 . WORK FLOW ..................................................... 28 .
Removal and Installation ......................................... 9 . DIAGNOSTIC PROCEDURE 1 .......................... 29 .
REMOVAL ............................................................ 9
. DIAGNOSTIC PROCEDURE 2 .......................... 30 .
INSTALLATION .................................................... 9. DIAGNOSTIC PROCEDURE 3 .......................... 31 . L
STARTING SYSTEM ............................................... 10 . DIAGNOSTIC PROCEDURE 4 .......................... 32 .
System Description ............................................... 10. DIAGNOSTIC PROCEDURE 5 .......................... 33 .
Wiring Diagram -- START -- .................................11 . MALFUNCTION INDICATOR ............................. 33 . M
VK45DE ENGINE MODELS ...............................11 . Removal and Installation ....................................... 34 .
VQ35DE ENGINE MODELS .............................. 12 . VK45DE ENGINE MODELS ............................... 34 .
Trouble Diagnosis with Battery/Starting/Charging VQ35DE ENGINE MODELS .............................. 35 .
System Tester ....................................................... 13
. Disassembly and Assembly ................................... 37 .
DIAGNOSTIC RESULT ITEM CHART ............... 13 . SERVICE DATA AND SPECIFICATIONS (SDS) ..... 39 .
WORK FLOW ..................................................... 14 . Battery ................................................................... 39
.
DIAGNOSTIC PROCEDURE 1 .......................... 15 . Starter .................................................................... 39
.
DIAGNOSTIC PROCEDURE 2 .......................... 16 . Alternator ............................................................... 39
.
MINIMUM SPECIFICATION OF CRANKING
Revision; 2004 April SC-1 2003 FX
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" AKS00794
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.
Wiring Diagrams and Trouble Diagnosis AKS00796
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-3, "POWER SUPPLY ROUTING CIRCUIT" for power distribution circuit in PG section.
When you perform trouble diagnosis, refer to the following:
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.
Revision; 2004 April SC-2 2003 FX
PREPARATION
PREPARATION PFP:00002
A
Special Service Tools AKS00797
Tool number
Description
Tool name B
J-44373 Model 620
Battery/Starting/Charging system
tester C
D
SEL403X
E
F
Commercial Service Tools AKS00798
Tool number G
Description
Tool name
Power tool Loosening bolts and nuts
H
I
PBIC0190E
J
SC
L
M
Revision; 2004 April SC-3 2003 FX
BATTERY
BATTERY PFP:AYBGL
How to Handle Battery AKS00C6G
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 cable.
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
Revision; 2004 April SC-4 2003 FX
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
D
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
L
MEL042FA M
Hydrometer Temperature Correction
Battery electrolyte temperature
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