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BRAKE CONTROL SYSTEM


F BRAKES

                                                                                                                                                                     A




                                                                                     SECTION
                                                                               BRAKE CONTROL SYSTEM
                                                                                                             BRC                                                     B



                                                                                                                                                                     C


                                                                                                                                                                     D


                                                                                                                                                                     E
                                                                    CONTENTS
                           VDC/TCS/ABS                                                 DATA MONITOR ................................................ 28     .        BRC
                                                                                       ACTIVE TEST .................................................... 30  .
PRECAUTIONS ......................................................... 3    .         For Fast and Accurate Diagnosis .......................... 34          .
 Precautions for Supplemental Restraint System                                         PRECAUTIONS FOR DIAGNOSIS .................... 34                    .        G
 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-                                             Basic Inspection .................................................... 36
                                                                                                                                                            .
 SIONER" ................................................................. 3
                                                                           .           BASIC INSPECTION 1 BRAKE FLUID AMOUNT,
 Precautions for Battery Service ............................... 3         .           LEAKS, AND BRAKE PADS INSPECTION ........ 36                         .
 Precautions for Brake System ................................. 3          .                                                                                         H
                                                                                       BASIC INSPECTION 2 POWER SYSTEM TER-
 Precautions for Brake Control ................................. 4         .           MINAL LOOSENESS AND BATTERY INSPEC-
PREPARATION .......................................................... 5   .           TION ................................................................... 36
                                                                                                                                                            .
 Special Service Tools .............................................. 5    .           BASIC INSPECTION 3 ABS WARNING LAMP,                                           I
 Commercial Service Tools ....................................... 5        .           VDC OFF INDICATOR LAMP, SLIP INDICATOR
ON-VEHICLE SERVICE ............................................ 6          .           LAMP INSPECTION ........................................... 36       .
 Adjustment of Steering Angle Sensor Neutral Posi-                                   Inspection 1 Wheel Sensor System ....................... 37            .        J
 tion .......................................................................... 6
                                                                           .           INSPECTION PROCEDURE ............................. 37                .
GENERAL INFORMATION ........................................ 7             .         Inspection 2 Engine System .................................. 39       .
 System Diagram ...................................................... 7   .         Inspection 3 VDC/TCS/ABS Control Unit 1 ........... 39                 .
 VDC Function .......................................................... 7 .                                                                                         K
                                                                                     Inspection 4 Pressure Sensor System .................. 39              .
 TCS Function .......................................................... 7 .         Inspection 5 Steering Angle Sensor System ......... 41                 .
 ABS Function .......................................................... 8 .         Inspection 6 Yaw Rate / Side G Sensor System ... 42
 EBD Function .......................................................... 8 .         Inspection 7 Solenoid and VDC Change-Over Valve                                 L
 Fail-Safe Function ................................................... 8  .         System ................................................................... 44
                                                                                                                                                            .
    VDC / TCS SYSTEM ............................................ 8        .         Inspection 8 ABS Motor and Motor Relay System... 47
    ABS, EBD SYSTEM ............................................. 8        .         Inspection 9 Solenoid Valve Relay System ........... 49                .        M
 Hydraulic Circuit Diagram ....................................... 9       .         Inspection 10 Stop Lamp Switch System .............. 50                .
CAN COMMUNICATION ......................................... 10             .         Inspection 11 VDC/TCS/ABS Control Unit Power
 System Description ............................................... 10     .         and Ground Systems ............................................. 51    .
TROUBLE DIAGNOSIS ............................................11           .         Inspection 12 VDC/TCS/ABS Control Unit 2 ......... 52                  .
 How to Proceed With Diagnosis .............................11             .         Inspection 13 Brake Fluid Level Sensor System ... 53
    BASIC CONCEPT ...............................................11        .         Inspection 14 CAN Communication System .......... 53                   .
    DIAGNOSIS FLOWCHART ............................... 12                 .         Inspection 15 When "SHIFT POSITION ERROR"
    ASKING COMPLAINTS ..................................... 13             .         Appears in Self-Diagnosis Results Display (For A/
    EXAMPLE OF DIAGNOSIS SHEET .................. 13                       .         T Models) ............................................................... 54
                                                                                                                                                            .
 Component Installation Location ........................... 14            .         Inspecting Components ......................................... 54     .
 Schematic ............................................................. 15.           VDC OFF SWITCH ............................................ 54       .
 Wiring Diagram -- VDC -- .................................... 16          .           VDC RELAY BOX ............................................... 55     .
 Control Unit Input/Output Signal Standard ............ 23                 .           VDC ACTUATOR ............................................... 56      .
    STANDARDS BY CONSULT-II ........................... 23                 .         Symptom 1 Excessive ABS Function Operation Fre-
 CONSULT-II Functions .......................................... 25        .         quency ................................................................... 56
                                                                                                                                                            .
    CONSULT-II MAIN FUNCTION .......................... 25                 .         Symptom 2 Unexpected Pedal Reaction ............... 57                 .
    SELF-DIAGNOSIS ............................................. 25        .

                                                                              BRC-1
 Symptom 3 The Braking Distance Is Long ............ 58                  .        SENSOR ROTOR .....................................................63 .
 Symptom 4 The ABS Function Does Not Operate... 58                                 Removal and Installation ........................................63 .
 Symptom 5 Pedal Vibration or ABS Operation                                          REMOVAL ...........................................................63
                                                                                                                                                       .
 Sound Occurs ........................................................ 59.           INSTALLATION ...................................................63.
 Symptom 6 Vehicle Jerks During VDC/TCS/ABS                                       VDC/TCS/ABS ACTUATOR .....................................64         .
 Control ................................................................... 59
                                                                         .         Removal and Installation ........................................64 .
WHEEL SENSORS .................................................. 61      .        G SENSOR ...............................................................65
                                                                                                                                                       .
 Removal and Installation ....................................... 61     .         Removal and Installation ........................................65 .
  REMOVAL .......................................................... 61  .           REMOVAL ...........................................................65
                                                                                                                                                       .
  INSTALLATION ................................................... 61    .           INSTALLATION ...................................................65.
VDC/TCS/ABS CONTROL UNIT ............................. 62                .        STEERING ANGLE SENSOR ..................................66           .
 Removal and Installation ....................................... 62     .         Removal and Installation ........................................66 .
  REMOVAL .......................................................... 62  .           REMOVAL ...........................................................66
                                                                                                                                                       .
  INSTALLATION ................................................... 62    .           INSTALLATION ...................................................66.




                                                                           BRC-2
                                             PRECAUTIONS
                                                                                            [VDC/TCS/ABS]
PRECAUTIONS
[VDC/TCS/ABS]                                                       PFP:00001
                                                                                                                       A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER"                                                                                         AFS0027D


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 Battery Service                                                                             AFS002I5


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              H
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.
                                                                                                                       I
Precautions for Brake System                                                                                AFS0013A


q   Recommended fluid is brake fluid "DOT 3".
q   Never reuse drained brake fluid.                                                                                   J
q   Be careful not to splash brake fluid on painted areas such as body. If brake fluid is splashed, wipe it off
    and flush area with water immediately.
q   Never use mineral oils such as gasoline or kerosene to clean. They will ruin rubber parts and cause                K
    improper operation.
q   Using a flare nut wrench, securely tighten brake tube flare nuts.
q   Brake system is an important safety part. If a brake fluid leak is                                                 L
    detected, always disassemble the affected part. If a malfunction
    is detected, replace part with a new one.
q   Before working, turn ignition switch OFF and disconnect con-                                                       M
    nectors of VDC actuator and control unit or battery negative ter-
    minal.
q   When installing brake piping, be sure to check torque.

                                                                                                         SBR686C




                                                   BRC-3
                                            PRECAUTIONS
                                                                                           [VDC/TCS/ABS]
Precautions for Brake Control                                                                             AFS001IC


q   During ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.
q   Just after starting vehicle after ignition switch ON, brake pedal may vibrate or motor operating noise may
    be heard from engine compartment. This is a normal status 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 booster operation, brake fluid level, and
    oil 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 control module, ABS function
    may have a malfunction or error.
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, the VDC OFF indi-
    cator lamp and SLIP indicator lamp may turn on or the VDC system may not operate properly. Compo-
    nents 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 the suspension, tires or components related to
    the brakes may cause the VDC OFF indicator lamp and the 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 noise may occur if the
    brake pedal is used. The noise 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 the VDC OFF indicator lamp may turn
    on. However, this is not a problem if normal operation can be resumed after restarting the engine.
q   Sudden turns (such as spin turns, acceleration turns), drifting, etc. When VDC function is OFF (VDC SW
    ON) may cause the yaw rate/side G -sensor system indicate a problem. However this is not a problem if
    normal operation can be resumed after restarting the engine.




                                                  BRC-4
                                            PREPARATION
                                                                                                [VDC/TCS/ABS]
PREPARATION                                                                                                PFP:00002
                                                                                                                             A
Special Service Tools                                                                                             AFS001I3


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
    (J25405)
    Drift                                                              Installing rear sensor rotor.                         D
    a: 76.5mm (3.012 in) dia.
    b: 55.0mm (2.17 in) dia.
                                                           ZZC0760D
                                                                                                                             E


    ST27863000                                                                                                               BRC
    (--)                                                               Installing rear sensor rotor.
    Drift

                                                                                                                             G
                                                           ZZC1307D




                                                                                                                             H
    KV40104710
    (--)                                                               Installing rear sensor rotor.
    Drift
                                                                                                                              I
                                                           ZZC1082D



Commercial Service Tools                                                                                          AFS0013E
                                                                                                                             J
   Tool name                                                          Description

                                                                                                                             K
   1.Flare nut crowfoot
    a:10mm (0.39 in), 12mm(0.47 in)                                   Removing and installing each brake piping
   2.Torque wrench                                                                                                           L

                                                           S-NT360


                                                                                                                             M




                                                   BRC-5
                                                 ON-VEHICLE SERVICE
                                                                                                       [VDC/TCS/ABS]
ON-VEHICLE SERVICE                                                                                                  PFP:00000

Adjustment of Steering Angle Sensor Neutral Position                                                                     AFS0013F


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                                                        -
     Removing/Installing steering angle sensor                                                 



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