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POWER STEERING SYSTEM


G STEERING

                                                                                                                                                            A




                                                                     POWER STEERING SYSTEM
                                                                                                 SECTION                   PS                               B



                                                                                                                                                            C


                                                                                                                                                            D


                                                                                                                                                            E
                                                               CONTENTS
PRECAUTIONS ......................................................... 3
                                                                     .          Components (with Automatic Drive Positioner) ..... 17              .        F
 Precautions for Supplemental Restraint System                                  Disassembly and Assembly ................................... 18    .
 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-                                          DISASSEMBLY .................................................. 18.
 SIONER" ................................................................. 3
                                                                     .            ASSEMBLY ........................................................ 18
                                                                                                                                                   .        PS
 Precautions Necessary for Steering Wheel Rotation                             POWER STEERING GEAR AND LINKAGE ........... 19                      .
 After Battery Disconnect ......................................... 3.          Removal and Installation ....................................... 19.
   OPERATION PROCEDURE ................................ 3            .            REMOVAL .......................................................... 19
                                                                                                                                                   .
                                                                                                                                                            H
 Precautions for Steering System ............................. 3     .            INSTALLATION .................................................. 20
                                                                                                                                                   .
PREPARATION .......................................................... 5
                                                                     .            INSPECTION AFTER INSTALLATION ............... 21                 .
 Special Service Tools (SST) .................................... 5  .          Disassembly and Assembly ................................... 22    .
 Commercial Service Tools ....................................... 6  .            DISASSEMBLY .................................................. 23.         I
NOISE, VIBRATION AND HARSHNESS (NVH)                                              INSPECTION AFTER DISASSEMBLY ............... 25                  .
TROUBLESHOOTING ............................................... 7    .            ASSEMBLY ........................................................ 26
                                                                                                                                                   .
 NVH Troubleshooting Chart .................................... 7    .         POWER STEERING OIL PUMP .............................. 31           .         J
POWER STEERING FLUID ....................................... 8       .          On-Vehicle Inspection and Service ........................ 31      .
 Checking Fluid Level ............................................... 8
                                                                     .            CHECKING RELIEF OIL PRESSURE (VQ35DE
 Checking Fluid Leakage .......................................... 8 .            MODELS) ........................................................... 31
                                                                                                                                                   .
                                                                                                                                                            K
 Air Bleeding Hydraulic System ................................ 8    .            CHECKING RELIEF OIL PRESSURE (VK45DE
STEERING WHEEL ................................................. 10  .            MODELS) ........................................................... 31
                                                                                                                                                   .
 On-Vehicle Inspection and Service ....................... 10        .          Removal and Installation (VQ35DE Models) ......... 32              .
   CHECKING CONDITION OF INSTALLATION ... 10                                      REMOVAL .......................................................... 32
                                                                                                                                                   .        L
   CHECKING STEERING WHEEL PLAY ............. 10                     .            INSTALLATION .................................................. 33
                                                                                                                                                   .
   CHECKING NEUTRAL POSITION ON STEER-                                          Removal and Installation (VK45DE Models) ......... 33              .
   ING WHEEL ....................................................... 10
                                                                     .            REMOVAL .......................................................... 33
                                                                                                                                                   .        M
   CHECKING STEERING WHEEL TURNING                                                INSTALLATION .................................................. 33
                                                                                                                                                   .
   FORCE ............................................................... 10
                                                                     .          Disassembly and Assembly (VQ35DE Models) .... 33                   .
   CHECKING FRONT WHEEL TURNING ANGLE                                ....11       INSPECTION BEFORE DISASSEMBLY ............ 33                    .
 Removal and Installation ........................................11 .            DISASSEMBLY .................................................. 34.
STEERING COLUMN .............................................. 12    .            INSPECTION AFTER DISASSEMBLY ............... 34                  .
 Removal and Installation ....................................... 12 .            ASSEMBLY ........................................................ 35
                                                                                                                                                   .
   REMOVAL .......................................................... 12
                                                                     .          Disassembly and Assembly (VK45DE Models) ..... 37                  .
   INSPECTION AFTER REMOVAL ...................... 14                .            INSPECTION BEFORE DISASSEMBLY ............ 37                    .
   INSTALLATION .................................................. 14.            DISASSEMBLY .................................................. 38.
   INSPECTION AFTER INSTALLATION .............. 14                   .            INSPECTION AFTER DISASSEMBLY ............... 38                  .
 Components (without Automatic Drive Positioner) 15                  ...          ASSEMBLY ........................................................ 38
                                                                                                                                                   .
 Disassembly and Assembly .................................. 15      .         HYDRAULIC LINE ................................................... 41
                                                                                                                                                   .
   DISASSEMBLY .................................................. 15 .          Components .......................................................... 41
                                                                                                                                                   .
   ASSEMBLY ........................................................ 16
                                                                     .          Removal and Installation ....................................... 43.
                                                                                Component ............................................................ 44
                                                                                                                                                   .
                                                                                Removal and Installation ....................................... 45.


Revision; 2004 April                                                      PS-1                                                                2003 FX
SERVICE DATA AND SPECIFICATIONS (SDS) ..... 46                      .          Steering Outer Socket and Inner Socket ................46             .
 Steering Wheel ...................................................... 46
                                                                    .          Steering Gear .........................................................47
                                                                                                                                                     .
 Steering Angle ....................................................... 46
                                                                    .          Oil Pump ................................................................47
                                                                                                                                                     .
 Steering Column .................................................... 46
                                                                    .          Steering Fluid .........................................................47
                                                                                                                                                     .




Revision; 2004 April                                                    PS-2                                                                  2003 FX
                                             PRECAUTIONS

PRECAUTIONS                                                         PFP:00001
                                                                                                                       A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER"                                                                                         AGS000GO


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.                                                                                             PS
Precautions Necessary for Steering Wheel Rotation After Battery Disconnect
                                                                                                            AGS000L3

NOTE:                                                                                                                  H
q    This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI
     VEHICLE IMMOBILIZER SYSTEM - NATS).
q    Remove and install all control units after disconnecting both battery cables with the ignition knob in the        I
     LOCK position.
q    Always use CONSULT-II to perform self-diagnosis as a part of each function inspection after finishing
     work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
                                                                                                                       J
For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock
mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.                                                                        K
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE                                                                                                    L
1.   Connect both battery cables.
     NOTE:
     Supply power using jumper cables if battery is discharged.                                                        M
2.   Use the Intelligent Key or mechanical key to turn the ignition switch to the ACC position. At this time, the
     steering lock will be released.
3.   Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
     rotated.
4.   Perform the necessary repair operation.
5.   When the repair work is completed, return the ignition switch to the LOCK position before connecting
     the battery cables. (At this time, the steering lock mechanism will engage.)
6.   Perform a self-diagnosis check of all control units using CONSULT-II.
Precautions for Steering System                                                                             AGS000GP


q    Before disassembly, thoroughly clean the outside of the unit.
q    Disassembly should be done in a clean work area. It is important to prevent the internal parts from becom-
     ing contaminated by dirt or other foreign matter.
q    For easier and proper assembly, place disassembled parts in order on a parts rack.


Revision; 2004 April                                 PS-3                                                2003 FX
                                           PRECAUTIONS

q   Use nylon cloth or paper towels to clean the parts; common shop rags can leave lint that might interfere
    with their operation.
q   Before inspection or reassembly, carefully clean all parts with a general purpose, non-flammable solvent.
q   Before assembly, apply a coat of recommended Genuine NISSAN PSF or equivalent to hydraulic parts.
    Petroleum jelly may be applied to O-rings and seals. Do not use any grease.
q   Replace all gaskets, seals and O-rings. Avoid damaging O-rings, seals and gaskets during installation.
    Perform functional tests whenever designated.




Revision; 2004 April                               PS-4                                              2003 FX
                                            PREPARATION

PREPARATION                                                                                                    PFP:00002
                                                                                                                               A
Special Service Tools (SST)                                                                                         AGS000GQ


The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
    Tool number
                                                                                                                               B
    (Kent-Moore No.)                                                   Description
    Tool name

    ST3127 S000                                                                                                                C
    (See J25765-A)
    Preload gauge
     1. GG9103000
                                                                                                                               D
       (J25765-A)
       Torque wrench                                                   Inspecting of sliding torque, steering
     2. HT62940000                                                     torque, and rotating torque for ball joint
       (    --    )                                                                                                            E
      Socket adapter
     3. HT62900000                                         S-NT541

      (     --    )
      Socket adapter                                                                                                           F

    HT72520000
    (J25730-A)                                                                                                                 PS
    Ball joint remover
                                                                       Removing steering outer socket
    a: 33 mm (1.30 in)
    b: 50 mm (1.97 in)
    r: 11.5 mm (0.453 in)                                                                                                      H
                                                           NT546




    KV4810 5400                                                                                                                 I
    (J-46213)
    Rear cover wrench                                                  Removing rear cover
    a: 21.6 mm (0.850 in)
    b: 34.9 mm (1.374 in)                                                                                                       J
                                                           SGIA0516E




    KV48104400                                                                                                                 K
    (    --      )
    Teflon ring correcting tool
                                                                       Installing of rack Teflon ring
    a: 50 mm (1.97 in) dia.
                                                                                                                               L
    b: 36 mm (1.42 in) dia.
    c: 100 mm (3.94 in)
                                                           S-NT550

                                                                                                                               M

    KV48103400
    (    --     )                                                      Inspecting rotating torque
    Torque adapter


                                                           ZZA0824D




Revision; 2004 April                                PS-5                                                        2003 FX
                                        PREPARATION

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

    1. KV48102500-04
    (       --     )
      Washer
     2. KV48102500-01
    (      --      )
    Eye joint
     3. KV48102500-03
                                                              Measuring oil pump relief pressure
    (       --     )
                                                              (VQ35DE models)
    Bolt
     4. KV48102500-02
    (       --     )
                                                  SGIA0442E
    Flare Joint
    5. KV48103500
    (J26357&J26357-10)
    Pressure gauge & shut off valve
    1. KV48105300-4 and 5295262U10
    (     --        )
    Connector A and O-ring
    2. KV48105300-3 and 5295262U00
    (     --        )
    Eye-bolt and O-ring
    3. KV48103500
                                                              Measuring oil pump relief pressure
    (J26357 and J26357-10)
                                                              (VK45DE models)
    Pressure gauge and shut-off valve
    4. KV48105300-1 and 5295262U00
    (     --        )
                                                  SGIA0427E
    Connector B and O-ring
    5. KV48105300-2
    (     --        )
    Nut

Commercial Service Tools                                                                             AGS000GR



    Tool name                                                 Description



                                                              q   Removing wheel nuts
    Power tool                                                q   Removing undercover
                                                              q   Removing steering gear

                                                  PBIC0190E




Revision; 2004 April                       PS-6                                                    2003 FX
                                                         Symptom




                       



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