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BRAKE CONTROL SYSTEM


F BRAKES

                                                                                                                                                                      A




                                                                                     SECTION
                                                                               BRAKE CONTROL SYSTEM
                                                                                                               BRC                                                    B



                                                                                                                                                                      C


                                                                                                                                                                      D


                                                                                                                                                                      E
                                                                    CONTENTS
                           VDC/TCS/ABS                                                CONSULT-II Basic Operation Procedure .............. 25                 .        BRC
                                                                                      Self-Diagnosis ....................................................... 26
                                                                                                                                                             .
PRECAUTIONS ......................................................... 3    .            DESCRIPTION ................................................... 26   .
 Precautions for Supplemental Restraint System                                          OPERATION PROCEDURE ............................... 26               .        G
 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-                                                ERASE MEMORY .............................................. 26       .
 SIONER" ................................................................. 3
                                                                           .            DISPLAY ITEM LIST .......................................... 27      .
 Precautions for Brake System ................................. 3          .          Data Monitor .......................................................... 30
                                                                                                                                                             .
 Precautions for Brake Control ................................. 3         .                                                                                          H
                                                                                        OPERATION PROCEDURE ............................... 30               .
PREPARATION .......................................................... 5   .            DISPLAY ITEM LIST .......................................... 30      .
 Special Service Tools .............................................. 5    .          Active Test ............................................................. 32
                                                                                                                                                             .
 Commercial Service Tools ....................................... 5        .            OPERATION PROCEDURE ............................... 32               .         I
ON-VEHICLE SERVICE ............................................ 6          .            TEST ITEM ......................................................... 33
                                                                                                                                                             .
 Adjustment of Steering Angle Sensor Neutral Posi-                                    For Fast and Accurate Diagnosis .......................... 34          .
 tion .......................................................................... 6
                                                                           .            PRECAUTIONS FOR DIAGNOSIS .................... 34                    .        J
SYSTEM DESCRIPTION ........................................... 7           .          Basic Inspection .................................................... 35
                                                                                                                                                             .
 System Diagram ...................................................... 7   .            BRAKE FLUID LEVEL AND LEAK INSPECTION 35                             ...
 VDC Function .......................................................... 7 .            INSPECTION FOR LOOSENESS OF POWER
 TCS Function .......................................................... 7 .                                                                                          K
                                                                                        SYSTEM TERMINALS ....................................... 35          .
 ABS Function .......................................................... 8 .            INSPECTION OF ABS WARNING LAMP,
 EBD Function .......................................................... 8 .            VDC OFF INDICATOR LAMP AND SLIP INDI-
 Hydraulic Pressure Control System Diagram .......... 8                    .            CATOR LAMP .................................................... 36   .        L
 CAN Communication ............................................... 8       .         TROUBLE DIAGNOSIS FOR SYSTEM ................... 37                     .
    SYSTEM DESCRIPTION ..................................... 8             .          Wheel Sensor System ........................................... 37     .
TROUBLE DIAGNOSIS ............................................. 9          .          Engine System ...................................................... 39.        M
 Fail-Safe Function ................................................... 9  .          VDC/TCS/ABS Control Unit 1 ................................ 39         .
    VDC/TCS SYSTEM .............................................. 9        .          Pressure Sensor System ....................................... 40      .
    ABS, EBD SYSTEM ............................................. 9        .          Steering Angle Sensor System .............................. 41         .
 How to Perform Trouble Diagnoses ........................ 9               .          Yaw Rate/Side G Sensor System .......................... 42            .
    BASIC CONCEPT ................................................ 9       .          Solenoid and VDC Change-Over Valve System .... 44                      .
    DIAGNOSIS FLOW CHART .............................. 10                 .          Actuator Motor and Motor Relay System ............... 45               .
    ASKING COMPLAINTS ......................................11             .          Actuator Relay System .......................................... 47    .
    EXAMPLE OF DIAGNOSIS SHEET ...................11                       .          Stop Lamp Switch System ..................................... 48       .
 Component Parts Location .................................... 12          .          VDC/TCS/ABS Control Unit Power and Ground
 Schematic ............................................................. 13.          System ................................................................... 49
                                                                                                                                                             .
 Wiring Diagram -- VDC -- .................................... 14          .          When "SHIFT POSITION ERROR" Appears in Self-
 Control Unit Input/Output Signal Standard ............ 22                 .          Diagnostic Results Display (A/T Models) .............. 51              .
    STANDARDS BY CONSULT-II ........................... 22                 .          VDC/TCS/ABS Control Unit 2 ................................ 51         .
 CONSULT-II Functions (VDC/TCS/ABS) .............. 24                      .          Brake Fluid Level Switch System .......................... 52          .
    CONSULT-II MAIN FUNCTION .......................... 24                 .




Revision: 2006 August                                                         BRC-1                                                        2006 G35 Sedan
 CAN Communication Circuit .................................. 53 .        VDC/TCS/ABS CONTROL UNIT .............................60             .
 Component Inspection ........................................... 53
                                                                 .         Removal and Installation ........................................60 .
  VDC OFF SWITCH ............................................ 53 .           REMOVAL ...........................................................60
                                                                                                                                               .
  ABS MOTOR RELAY AND ACTUATOR RELAY... 53                                   INSTALLATION ...................................................60.
  VDC/TCS/ABS ACTUATOR ............................... 54        .        SENSOR ROTOR .....................................................61 .
TROUBLE DIAGNOSIS FOR SYMPTOMS ............. 55                  .         Removal and Installation ........................................61 .
 Excessive ABS Function Operation Frequency ..... 55             .           REMOVAL ...........................................................61
                                                                                                                                               .
 Unexpected Pedal Reaction .................................. 55 .           INSTALLATION ...................................................61.
 The Braking Distance Is Long ................................ 56.        VDC/TCS/ABS ACTUATOR .....................................62         .
 The ABS Function Does Not Operate ................... 56        .         Removal and Installation ........................................62 .
 Pedal Vibration or ABS Operation Sound Occurs... 57                      G-SENSOR ...............................................................63
                                                                                                                                               .
 Vehicle Jerks During VDC/TCS/ABS Control ........ 57            .         Removal and Installation ........................................63 .
WHEEL SENSOR ..................................................... 59
                                                                 .           REMOVAL ...........................................................63
                                                                                                                                               .
 Removal and Installation ....................................... 59
                                                                 .           INSTALLATION ...................................................63.
  REMOVAL .......................................................... 59
                                                                 .        STEERING ANGLE SENSOR ..................................64           .
  INSTALLATION ................................................... 59
                                                                 .         Removal and Installation ........................................64 .
                                                                             REMOVAL ...........................................................64
                                                                                                                                               .
                                                                             INSTALLATION ...................................................64.




Revision: 2006 August                                              BRC-2                                                     2006 G35 Sedan
                                             PRECAUTIONS
                                                                                            [VDC/TCS/ABS]
PRECAUTIONS
[VDC/TCS/ABS]                                                       PFP:00001
                                                                                                                      A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER"                                                                                        NFS0009D


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.                                                                                BRC
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
Precautions for Brake System                                                                               NFS0009E


q   Recommended fluid is brake fluid "DOT 3". Refer to MA-10, "RECOMMENDED FLUIDS AND LUBRI-
    CANTS" .                                                                                                          H
q   Do not reuse drained brake fluid.
q   Be careful not to splash brake fluid on painted surface of body. If brake fluid is splashed on painted sur-
    faces of body immediately wipe it off with cloth and then wash it away with water.                                I
q   Do not use mineral oils such as gasoline or kerosene to clean. They will ruin rubber parts and cause
    improper operation.
                                                                                                                      J
q   Use a flare nut wrench when removing flare nuts, and use a flare
    nut torque wrench when tighten brake tube flare nuts.
q   Brake system is an important safety part. If a brake fluid leak is
    detected, always disassemble the affected part. If a malfunction                                                  K
    is detected, replace part with a new one.
q   Before working, turn ignition switch OFF and disconnect con-
    nectors of VDC/TCS/ABS control unit or the battery cables.                                                        L
q   When installing brake piping, be sure to check torque.
WARNING:
Clean brake pads and shoes with a waste cloth, then wipe with                                                         M
                                                                                                        SBR686C
a dust collector.
Precautions for Brake Control                                                                              NFS0009F


q   During ABS operation, brake pedal lightly vibrates and a mechanical sound may be heard. This is normal.
q   Just after starting vehicle after turning ignition switch ON, brake pedal may vibrate or motor operating
    sound may be heard from engine compartment. This is a normal condition of operation check.
q   Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
    or snow-covered (fresh, deep snow) roads.
q   When an error is indicated by ABS or another warning lamp, collect all necessary information from cus-
    tomer (what symptoms are present under what conditions) and check for simple causes before starting
    diagnostic servicing. Besides electrical system inspection, check brake booster operation, brake fluid
    level, and fluid leaks.
q   If tire size and type are used in an improper combination, or brake pads are not Genuine NISSAN parts,
    stopping distance or steering stability may deteriorate.
q   If there is a radio, antenna, or antenna lead-in wire (including wiring) near VDC/TCS/ABS control unit,
    ABS function may have a malfunction or error.

Revision: 2006 August                              BRC-3                                        2006 G35 Sedan
                                            PRECAUTIONS
                                                                                           [VDC/TCS/ABS]
q   If aftermarket parts (car stereo, CD player, etc.) Have been installed, check for incidents such as harness
    pinches, open circuits, and improper wiring.
q   If the following components are replaced with non-genuine components or converted, VDC OFF indicator
    lamp and SLIP indicator lamp may turn on or the VDC system may not operate properly. Components
    related to suspension (shock absorber, strut, spring, bush, etc.), Tires, wheels (exclude specified size),
    components related to brake (pad, rotor, caliper, etc.), Components related to engine (Muffler, ECM, etc.),
    Components related to body reinforcement (roll bar, Tower bar, etc.).
q   Driving in the condition of breakage or excessive wear of suspension, tires or components related to
    brakes may cause VDC OFF indicator lamp and SLIP indicator lamp to turn on, and the VDC system
    may not operate properly.
q   When the TCS or VDC is activated by sudden acceleration or sudden turn, some sound may occur if
    brake pedal is used. The sound is a result of the normal operation of the TCS and VDC.
q   When driving on roads which have extreme slopes (such as mountainous roads) or high banks (such as
    sharp carves on a freeway), the VDC may not operate normally, or VDC OFF indicator lamp or VDC OFF
    indicator lamp and SLIP indicator lamp may turn on. However, this is not a malfunction, if normal opera-
    tion can be resumed after restarting engine.
q   Sudden turns (such as spin turns, acceleration turns), drifting, etc. When VDC function is OFF (VDC OFF
    switch ON) may cause yaw rate/side G sensor system to indicate a malfunction. However, this is not a
    malfunction if normal operation can be resumed after restarting engine. Then erase memory of self-diag-
    nosis.




Revision: 2006 August                             BRC-4                                       2006 G35 Sedan
                                            PREPARATION
                                                                                                [VDC/TCS/ABS]
PREPARATION                                                                                                  PFP:00002
                                                                                                                           A
Special Service Tools                                                                                           NFS000LA


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
                                                                                                                           C
    ST3072000
    (J-25405)
    Drift                                                              Installing rear sensor rotor.                       D
    a: 77 mm (3.03 in) dia.
    b: 55.5 mm (2.19 in) dia.
                                                           ZZC0760D
                                                                                                                           E

    ST27863000
    (     --   )                                                                                                           BRC
    Drift                                                              Installing rear sensor rotor.
    a: 74.5 mm (2.93 in) dia.
    b: 62.5 mm (2.46 in) dia.
                                                                                                                           G
                                                           ZZA0832D




    KV40104710                                                                                                             H
    (     --   )
    Drift                                                              Installing rear sensor rotor.
    a: 76.3 mm (3.00 in) dia.
    b: 67.9 mm (2.67 in) dia.                                                                                               I
                                                           ZZA0832D



Commercial Service Tools                                                                                        NFS000LB
                                                                                                                           J
   Tool name                                                          Description

                                                                                                                           K
   1. Flare nut crowfoot
    a: 10 mm (0.39 in)/ 12 mm (0.47 in)                               Installing each brake piping
   2. Torque wrench                                                                                                        L

                                                           S-NT360


                                                                                                                           M




Revision: 2006 August                              BRC-5                                               2006 G35 Sedan
                                             ON-VEHICLE SERVICE
                                                                                                [VDC/TCS/ABS]
ON-VEHICLE SERVICE                                                                                           PFP:00000

Adjustment of Steering Angle Sensor Neutral Position                                                              NFS0009I


In case of doing work that applies to the list below, make sure to adjust neutral position of steering angle sen-
sor before running vehicle.
                               Situation                         Adjustment of Steering Angle Sensor Neutral Position
 Removing/Installing VDC/TCS/ABS control unit                                             -
 Replacing VDC/TCS/ABS control unit                                                       



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