Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti FX45 FX35 2003-2005 Approved FX45_35-S50-2003 sc

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STARTING & 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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