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STARTING & CHARGING SYSTEM


K ELECTRICAL

                                                                                                                                                                   A




                                                      STARTING & CHARGING SYSTEM
                                                                                                  SECTION                     SC                                   B



                                                                                                                                                                   C


                                                                                                                                                                   D


                                                                                                                                                                   E
                                                                CONTENTS
PRECAUTIONS ......................................................... 2
                                                                      .            DIAGNOSTIC PROCEDURE 1 .......................... 16                   .        F
 Precautions for Supplemental Restraint System                                     DIAGNOSTIC PROCEDURE 2 .......................... 17                   .
 (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 ....................................... 18      .
PREPARATION .......................................................... 3
                                                                      .            REMOVAL .......................................................... 18  .
                                                                                                                                                                   H
 Special Service Tools .............................................. 3
                                                                      .            INSTALLATION .................................................. 18     .
 Commercial Service Tools ....................................... 3   .          Disassembly and Assembly ................................... 19          .
BATTERY ................................................................... 4
                                                                      .          Inspection After Disassembly ................................ 19         .
 How to Handle Battery ............................................ 4 .            PINION/CLUTCH CHECK .................................. 19              .         I
   METHODS OF PREVENTING OVER-DIS-                                              CHARGING SYSTEM .............................................. 20         .
   CHARGE .............................................................. 4
                                                                      .          System Description ................................................ 20   .
   CHECKING ELECTROLYTE LEVEL ................... 5                   .          Wiring Diagram -- CHARGE -- ............................ 21              .        J
   SPECIFIC GRAVITY CHECK .............................. 5            .          Trouble Diagnosis with Battery/Starting/Charging
   CHARGING THE BATTERY ................................ 6            .          System Tester ........................................................ 22.
 Trouble Diagnoses with Battery/Starting/Charging                                  DIAGNOSTIC RESULT ITEM CHART ............... 23                        .
                                                                                                                                                                   SC
 System Tester ......................................................... 6
                                                                      .            WORK FLOW ..................................................... 24     .
   DIAGNOSTIC RESULT ITEM CHART ................. 8                   .            DIAGNOSTIC PROCEDURE 1 .......................... 25                   .
 Removal and Installation ......................................... 9 .            DIAGNOSTIC PROCEDURE 2 .......................... 26                   .
   REMOVAL ............................................................ 9
                                                                      .            DIAGNOSTIC PROCEDURE 3 .......................... 27                   .        L
   INSTALLATION .................................................... 9.            DIAGNOSTIC PROCEDURE 4 .......................... 28                   .
STARTING SYSTEM ............................................... 10    .            DIAGNOSTIC PROCEDURE 5 .......................... 29                   .
 System Description ............................................... 10.            MALFUNCTION INDICATOR ............................. 30                 .        M
   M/T MODEL ....................................................... 10
                                                                      .          Removal and Installation ....................................... 30      .
   A/T MODEL ........................................................ 10
                                                                      .            REMOVAL .......................................................... 30  .
 Wiring Diagram -- START -- .................................11       .            INSTALLATION .................................................. 31     .
   M/T MODEL ........................................................11
                                                                      .          Disassembly and Assembly ................................... 32          .
   A/T MODEL ........................................................ 13
                                                                      .         SERVICE DATA AND SPECIFICATIONS (SDS) ..... 33                            .
 Trouble Diagnosis with Battery/Starting/Charging                                Battery ................................................................... 33
                                                                                                                                                          .
 System Tester ....................................................... 14
                                                                      .          Starter .................................................................... 33
                                                                                                                                                          .
   DIAGNOSTIC RESULT ITEM CHART ............... 14                    .          Alternator ............................................................... 33
                                                                                                                                                          .
   WORK FLOW ..................................................... 15 .




Revision; 2004 April                                                      SC-1                                                         2003 G35 Coupe
                                              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                                                                               AKS003YU


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.




Revision; 2004 April                                  SC-2                                        2003 G35 Coupe
                                     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




                                                                                                          E



                                                                                                          F
Commercial Service Tools                                                                       AKS003YX



 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 G35 Coupe
                                                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




Revision; 2004 April                                SC-4                              2003 G35 Coupe
                                                      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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