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BRAKE CONTROL SYSTEM


F BRAKES

                                                                                                                                                                    A




                                                                               SECTION
                                                                         BRAKE CONTROL SYSTEM
                                                                                                           BRC                                                      B



                                                                                                                                                                    C


                                                                                                                                                                    D


                                                                                                                                                                    E
                                                               CONTENTS
                                  ABS                                           Basic Inspection .................................................... 29   .        BRC
                                                                                  BASIC INSPECTION 1 BRAKE FLUID AMOUNT,
PRECAUTIONS ......................................................... 4
                                                                     .            LEAKS, AND BRAKE PADS INSPECTION ........ 29                             .
 Precautions for Supplemental Restraint System                                    BASIC INSPECTION 2 POWER SYSTEM TER-                                              G
 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-                                          MINAL LOOSENESS AND BATTERY INSPEC-
 SIONER" ................................................................. 4
                                                                     .            TION ................................................................... 29
                                                                                                                                                           .
 Precautions for Battery Service ............................... 4   .            BASIC INSPECTION 3 ABS WARNING LAMP
 Precautions for Brake System ................................. 4    .                                                                                              H
                                                                                  INSPECTION ..................................................... 29      .
 Precautions for Brake Control ................................. 4   .          Inspection 1 Wheel Sensor System ....................... 30                .
PREPARATION .......................................................... 6
                                                                     .            INSPECTION PROCEDURE ............................. 30                    .
 Special Service Tools .............................................. 6
                                                                     .          Inspection 2 Engine System .................................. 32           .         I
 Commercial Service Tools ....................................... 6  .          Inspection 3 ABS Actuator and Electric Unit (Control
SYSTEM DESCRIPTION ........................................... 7     .          Unit) ....................................................................... 32
                                                                                                                                                           .
 System Diagram ...................................................... 7
                                                                     .          Inspection 4 ABS Actuator and Electric Unit (Control                                J
 ABS Function .......................................................... 7
                                                                     .          Unit) Power and Ground Systems ......................... 32                .
 EBD Function .......................................................... 7
                                                                     .          Inspection 5 ABS Actuator Relay or ABS Motor
 Fail-Safe Function ................................................... 7
                                                                     .          Relay Power System ............................................. 34        .
   ABS, EBD SYSTEM ............................................. 7   .                                                                                              K
                                                                                Inspection 6 Stop Lamp Switch System ................ 35                   .
 Hydraulic Circuit Diagram ....................................... 8 .          Inspection 7 ABS Actuator and Electric Unit (Control
CAN COMMUNICATION ........................................... 9      .          Unit) 2 .................................................................... 36
                                                                                                                                                           .
 System Description ................................................. 9
                                                                     .          Inspection 8 CAN Communication System ............ 36                      .        L
TROUBLE DIAGNOSIS ........................................... 10     .          Symptom 1 Excessive ABS Function Operation Fre-
 How to Proceed with Diagnosis ............................ 10       .          quency ................................................................... 37
                                                                                                                                                           .
   BASIC CONCEPT .............................................. 10   .          Symptom 2 Unexpected Pedal Reaction ............... 37                     .        M
   DIAGNOSIS FLOWCHART ................................11            .          Symptom 3 The Braking Distance is Long ............ 38                     .
   ASKING COMPLAINTS ..................................... 12        .          Symptom 4 The ABS Function Does Not Operate 38                             ...
   EXAMPLE OF DIAGNOSIS SHEET .................. 12                  .          Symptom 5 Pedal Vibration or ABS Operation
 Component Parts Location .................................... 13    .          Sound Occurs ........................................................ 38   .
 Schematic -- ABS -- ............................................ 14 .         WHEEL SENSORS .................................................. 39         .
 Wiring Diagram -- ABS -- .................................... 15    .          Removal and Installation ....................................... 39        .
 Control Unit Input/Output Signal Standard ............ 19           .            REMOVAL .......................................................... 39    .
   REFERENCE VALUE FROM CONSULT-II ........ 19                       .            INSTALLATION .................................................. 39       .
 CONSULT- II Functions ......................................... 20  .         SENSOR ROTOR .................................................... 40        .
   CONSULT-II MAIN FUNCTION .......................... 20            .          Removal and Installation ....................................... 40        .
   CONSULT-II BASIC OPERATION PROCEDURE                                           REMOVAL .......................................................... 40    .
                                                                     ... 20       INSTALLATION .................................................. 40       .
   SELF-DIAGNOSIS ............................................. 22   .         ABS ACTUATOR AND ELECTRIC UNIT (ASSEM-
   DATA MONITOR ................................................ 24  .         BLY) .......................................................................... 41
                                                                                                                                                           .
   ACTIVE TEST .................................................... 26
                                                                     .          Removal and Installation ....................................... 41        .
 Correct and Quick Diagnosis ................................ 28     .
   DIAGNOSIS PRECAUTIONS ............................ 28             .

Revision: 2005 August                                                   BRC-1                                                                    2005 350Z
                                TCS/ABS                                              Unit) Power and Ground Systems .........................76                 .
                                                                                     Inspection 5 ABS Actuator Relay or ABS Motor
PRECAUTIONS ........................................................ 42    .         Relay Power System ..............................................77        .
 Precautions for Supplemental Restraint System                                       Inspection 6 Stop Lamp Switch System .................79                   .
 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-                                             Inspection 7 ABS Actuator and Electric Unit (Control
 SIONER" ................................................................ 42
                                                                           .         Unit) 2 ....................................................................80
                                                                                                                                                                .
 Precautions for Battery Service ............................. 42          .         Inspection 8 CAN Communication System ............80                       .
 Precautions for Brake System ............................... 42           .         Component Inspection ...........................................80         .
 Precautions for Brake Control ............................... 42          .           TCS OFF SWITCH .............................................80           .
PREPARATION ........................................................ 44    .         Symptom 1 Excessive ABS Function Operation Fre-
 Special Service Tools ............................................ 44     .         quency ...................................................................80
                                                                                                                                                                .
 Commercial Service Tools ..................................... 44         .         Symptom 2 Unexpected Pedal Reaction ...............81                      .
SYSTEM DESCRIPTION ......................................... 45            .         Symptom 3 The Braking Distance Is Long .............81                     .
 System Diagram .................................................... 45    .         Symptom 4 The ABS Function Does Not Operate...82
 TCS Function ......................................................... 45 .         Symptom 5 Pedal Vibration or ABS Operation
 ABS Function ......................................................... 45 .         Sound Occurs ........................................................82    .
 EBD Function ........................................................ 45  .         Symptom 6 The Vehicle Jerks Around During TCS/
 Fail-Safe Function ................................................. 45   .         ABS Control ...........................................................82  .
   TCS SYSTEM ..................................................... 45     .        WHEEL SENSORS ..................................................85          .
   ABS, EBD SYSTEM ........................................... 46          .         Removal and Installation ........................................85        .
 Hydraulic Circuit Diagram ...................................... 46       .           REMOVAL ...........................................................85    .
CAN COMMUNICATION .......................................... 47            .           INSTALLATION ...................................................85       .
 System Description ................................................ 47    .        SENSOR ROTOR .....................................................86        .
TROUBLE DIAGNOSIS ........................................... 48           .         Removal and Installation ........................................86        .
 How to Proceed with Diagnosis ............................. 48            .           REMOVAL ...........................................................86    .
   BASIC CONCEPT .............................................. 48         .           INSTALLATION ...................................................86       .
   DIAGNOSIS FLOWCHART ................................ 49                 .        ABS ACTUATOR AND ELECTRIC UNIT (ASSEM-
   ASKING COMPLAINTS ...................................... 50             .        BLY) ..........................................................................87
                                                                                                                                                                .
   EXAMPLE OF DIAGNOSIS SHEET ................... 50                       .         Removal and Installation ........................................87        .
 Component Parts Location .................................... 51          .
 Schematic -- TCS -- ............................................ 52       .
 Wiring Diagram -- TCS -- .................................... 53          .
                                                                                                               VDC/TCS/ABS
 Wiring Diagram -- TCS -- ROAD STAR ............... 57                     .        PRECAUTIONS ........................................................88      .
 Control Unit Input/Output Signal Standard ............. 61                .         Precautions for Supplemental Restraint System
   REFERENCE VALUE FROM CONSULT-II ........ 61                             .         (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
 CONSULT- II Functions ......................................... 63        .         SIONER" ................................................................88 .
   CONSULT-II MAIN FUNCTION .......................... 63                  .         Precautions for Battery Service .............................88            .
   CONSULT-II BASIC OPERATION PROCEDURE                                              Precautions for Brake System ...............................88             .
                                                                           ... 63    Precautions for Brake Control ................................89           .
   SELF-DIAGNOSIS ............................................. 65         .        PREPARATION ........................................................90      .
   DATA MONITOR ................................................. 67       .         Special Service Tools .............................................90      .
   ACTIVE TEST .................................................... 70     .         Commercial Service Tools .....................................90           .
 Correct and Quick Diagnosis ................................. 72          .        ON-VEHICLE SERVICE ...........................................91            .
   DIAGNOSIS PRECAUTIONS ............................. 72                  .         Adjustment of Steering Angle Sensor Neutral Posi-
 Basic Inspection .................................................... 73  .         tion .........................................................................91
                                                                                                                                                                .
   BASIC INSPECTION 1 BRAKE FLUID AMOUNT,                                           SYSTEM DESCRIPTION ..........................................92             .
   LEAKS, AND BRAKE PADS INSPECTION ........ 73                            .         System Diagram ....................................................92      .
   BASIC INSPECTION 2 POWER SYSTEM TER-                                              VDC Function .........................................................92   .
   MINAL LOOSENESS AND BATTERY INSPEC-                                               TCS Function .........................................................92   .
   TION ................................................................... 73
                                                                           .         ABS Function .........................................................93   .
   BASIC INSPECTION 3 ABS WARNING LAMP,                                              EBD Function .........................................................93   .
   TCS OFF INDICATOR LAMP, SLIP INDICATOR                                            Fail-Safe Function ..................................................93    .
   LAMP INSPECTION ........................................... 73          .            VDC / TCS SYSTEM ..........................................93           .
 Inspection 1 Wheel Sensor System ....................... 74               .            ABS, EBD SYSTEM ............................................93          .
   INSPECTION PROCEDURE .............................. 74                  .         Hydraulic Circuit Diagram ......................................94         .
 Inspection 2 Engine System .................................. 76          .        CAN COMMUNICATION ..........................................95              .
 Inspection 3 ABS Actuator and Electric Unit (Control                                System Description ................................................95      .
 Unit) ....................................................................... 76
                                                                           .        TROUBLE DIAGNOSIS ...........................................96             .
 Inspection 4 ABS Actuator and Electric Unit (Control                                How to Proceed With Diagnosis ............................96               .

Revision: 2005 August                                                        BRC-2                                                                    2005 350Z
    BASIC CONCEPT .............................................. 96        .        Inspection 11 VDC/TCS/ABS Control Unit Power
    DIAGNOSIS FLOWCHART ............................... 97                 .        and Ground Systems ........................................... 137      .       A
    ASKING COMPLAINTS ..................................... 98             .        Inspection 12 VDC/TCS/ABS Control Unit 2 ....... 139                    .
    EXAMPLE OF DIAGNOSIS SHEET .................. 98                       .        Inspection 13 Brake Fluid Level Sensor System . 139
  Component Parts Location .................................... 99         .        Inspection 14 CAN Communication System ........ 140                     .       B
  Schematic ........................................................... 100.        Component Inspection ......................................... 140      .
  Wiring Diagram -- VDC -- .................................. 101          .          VDC OFF SWITCH .......................................... 140         .
  Control Unit Input/Output Signal Standard .......... 109                 .          ABS MOTOR RELAY AND ACTUATOR RELAY 141                                .
    REFERENCE VALUE FROM CONSULT-II ...... 109                             .          VDC/TCS/ABS ACTUATOR ............................. 141                .       C
  CONSULT-II Functions ......................................... 111       .        Symptom 1 Excessive ABS Function Operation Fre-
    CONSULT-II MAIN FUNCTION ......................... 111                 .        quency ................................................................. 141
                                                                                                                                                            .
    CONSULT-II BASIC OPERATION PROCEDURE                                            Symptom 2 Unexpected Pedal Reaction ............. 142                   .       D
                                                                           ..112    Symptom 3 The Braking Distance Is Long .......... 142                   .
    SELF-DIAGNOSIS ............................................112         .        Symptom 4 The ABS Function Does Not Operate 143                         .
    DATA MONITOR ...............................................115        .        Symptom 5 Pedal Vibration or ABS Operation                                      E
    ACTIVE TEST ...................................................119     .        Sound Occurs ...................................................... 144 .
  Correct and Quick Diagnosis .............................. 120           .        Symptom 6 Vehicle Jerks During VDC/TCS/ABS
    DIAGNOSIS PRECAUTIONS .......................... 120                   .        Control ................................................................. 144
                                                                                                                                                            .
  Basic Inspection .................................................. 121  .       WHEEL SENSORS ................................................ 146       .       BRC
    BASIC INSPECTION 1 BRAKE FLUID AMOUNT,                                          Removal and Installation ..................................... 146      .
    LEAKS, AND BRAKE PADS INSPECTION ..... 121                             .          REMOVAL ........................................................ 146  .
    BASIC INSPECTION 2 POWER SYSTEM TER-                                              INSTALLATION ................................................ 146     .       G
    MINAL LOOSENESS AND BATTERY INSPEC-                                            VDC/TCS/ABS CONTROL UNIT ........................... 147                 .
    TION ................................................................. 122
                                                                           .        Removal and Installation ..................................... 147      .
    BASIC INSPECTION 3 ABS WARNING LAMP,                                              REMOVAL ........................................................ 147  .       H
    VDC OFF INDICATOR LAMP, SLIP INDICATOR                                            INSTALLATION ................................................ 147     .
    LAMP INSPECTION ........................................ 122           .       SENSOR ROTOR .................................................. 148      .
  Inspection 1 Wheel Sensor System .................... 122                .        Removal and Installation ..................................... 148      .
                                                                                                                                                                     I
    INSPECTION PROCEDURE ........................... 122                   .          REMOVAL ........................................................ 148  .
  Inspection 2 Engine System ................................ 125          .          INSTALLATION ................................................ 148     .
  Inspection 3 VDC/TCS/ABS Control Unit 1 ......... 125                    .       VDC/TCS/ABS ACTUATOR .................................. 149              .
  Inspection 4 Pressure Sensor System ................ 125                 .        Removal and Installation ..................................... 149      .       J
  Inspection 5 Steering Angle Sensor System ....... 127                    .       G SENSOR ............................................................. 150
                                                                                                                                                            .
  Inspection 6 Yaw Rate Sensor /Side G Sensor Sys-                                  Removal and Installation ..................................... 150      .
  tem ...................................................................... 128
                                                                           .          REMOVAL ........................................................ 150  .       K
  Inspection 7 Solenoid and VDC Change-Over Valve                                     INSTALLATION ................................................ 150     .
  System ................................................................ 130
                                                                           .       STEERING ANGLE SENSOR ............................... 151                .
  Inspection 8 ABS Motor and Motor Relay System 132                        .        Removal and Installation ..................................... 151      .       L
  Inspection 9 Actuator Relay System ................... 135               .          REMOVAL ........................................................ 151  .
  Inspection 10 Stop Lamp Switch System ............ 136                   .          INSTALLATION ................................................ 151     .

                                                                                                                                                                    M




Revision: 2005 August                                                       BRC-3                                                                 2005 350Z
                                              PRECAUTIONS
                                                                                                            [ABS]
PRECAUTIONS
[ABS]                                                               PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER"                                                                                           AFS0035K


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                                                                               AFS0028N


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.
Precautions for Brake System                                                                                  AFS0028O


q   Recommended fluid is brake fluid "DOT 3".
q   Never reuse drained brake fluid.
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
    improper operation.
q   Using a flare nut torque wrench, securely 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
    is detected, replace part with a new one.
q   Before working, turn ignition switch OFF.
q   When installing brake piping, be sure to check torque.
WARNING:
Clean brake pads and shoes with a waste cloth, then wipe with
a dust collector.                                                                                     SBR686C


Precautions for Brake Control                                                                                 AFS0028P


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.

Revision: 2005 August                                BRC-4                                               2005 350Z
                                            PRECAUTIONS
                                                                                                       [ABS]
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.                                                      A
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   B
    pinches, open circuits, and improper wiring.

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Revision: 2005 August                             BRC-5                                             2005 350Z
                                            PREPARATION
                                                                                                            [ABS]
PREPARATION                                                                                                PFP:00002

Special Service Tools                                                                                             AFS0028R


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


   ST3072 0000
   (J 25405)
   Drift
   a: 77 mm (0.03 in) dia.
   b: 55 mm (2.17 in) dia.
                                                           ZZA0701D




   ST2786 3000
   ( -- )
                                                                      Installation rear sensor rotor
   Drift
   a: 75 mm (2.95 in) dia.
   b: 62 mm (2.44 in) dia.
                                                           ZZA0832D




   KV401 04710
   ( -- )
   Drift
   a: 76 mm (2.99 in) dia.
   b: 68.5 mm (2.697in) dia.
                                                           ZZA0832D



Commercial Service Tools                                                                                          AFS0028S


   Tool name                                                          Description



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


                                                           S-NT360




Revision: 2005 August                              BRC-6                                                 2005 350Z
                                      SYSTEM DESCRIPTION
                                                                                                       [ABS]
SYSTEM DESCRIPTION                                                                                   PFP:00000
                                                                                                                      A
System Diagram                                                                                             AFS0028T




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                                                                                                    SFIA0949E
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ABS Function                                                                                               AFS0028U


q   The Anti-Lock Brake System is a function that detects wheel revolution while braking, and it improves             H
    handling stability during sudden braking by electrically preventing 4 wheel lock. Maneuverability is also
    improved for avoiding obstacles.
q    If the electrical system breaks down, then the Fail-Safe function starts, the ABS becomes inoperative,            I
    and the ABS warning lamp turns on.
q   Electrical System Diagnosis by CONSULT-II is available.
                                                                                                                      J
EBD Function                                                                                               AFS0028V


q   Electronic Brake Distributor is a function that detects subtle slippages between the front and rear wheels
    during braking, and it improves handling stability by electronically controlling the Brake Fluid Pressure         K
    which results in reduced rear wheel slippage.
q   In case of electrical system break down, the Fail-Safe function is activated, the EBD and ABS becomes
    inoperative, and the ABS warning lamp and brake warning lamp are turned on.
                                                                                                                      L
q   Electrical System Diagnosis by CONSULT-II is available.
Fail-Safe Function                                                                                         AFS0028W

ABS, EBD SYSTEM                                                                                                       M
In case of electrical problems with the ABS, the ABS warning lamp will turn on. In case of electrical problem
with the EBD, Brake warning lamp, ABS warning lamp will turn on. Simultaneously, the ABS become one of
the following conditions of the Fail-Safe function.
1. For ABS trouble, only the EBD is activated and the condition of the vehicle is the same condition of vehi-
     cles without ABS equipment.
2. For EBD trouble, the EBD and ABS become inoperative, and the condition of the vehicle is the same as
     the condition of vehicles without ABS, EBD equipment.
NOTE:
In condition 1 described above, an ABS Self Diagnosis sound may be heard. That is a normal condition
because a self diagnosis for "Key Switch ON" and "the First Starting" are being performed.




Revision: 2005 August                             BRC-7                                            2005 350Z
                            SYSTEM DESCRIPTION
                                                    [ABS]
Hydraulic Circuit Diagram                               AFS0028X




                                                 SFIA1877E




Revision: 2005 August             BRC-8          2005 350Z
                                       CAN COMMUNICATION
                                                                                                        [ABS]
CAN COMMUNICATION                                                                                      PFP:23710
                                                                                                                     A
System Description                                                                                        AFS0028Y


CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-       B
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only. Refer to LAN-21, "CAN            C
Communication Unit" .

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Revision: 2005 August                              BRC-9                                             2005 350Z
                                       TROUBLE DIAGNOSIS
                                                                                                 [ABS]
TROUBLE DIAGNOSIS                                                                               PFP:00004

How to Proceed with Diagnosis                                                                       AFS00290

BASIC CONCEPT
q   Most important point to perform diagnosis is to understand systems (control and mechanism) in vehicle
    thoroughly.

q   It is also important to clarify customer complaints before inspec-
    tion.
    First of all, reproduce symptom, and understand it fully.
    Ask customer about his/her complaints carefully. In some cases,
    it will be necessary to check symptom by driving vehicle with
    customer.
    NOTE:
    Customers are not professionals. Do not assume "maybe cus-
    tomer means..." or "maybe customer mentioned this symptom".

                                                                                                 EFJ0028D



q   It is essential to check symptoms right from beginning in order to
    repair a malfunction completely.
    For an intermittent malfunction, it is important to reproduce
    symptom based on interview with customer and past examples.
    Do not perform inspection on ad hoc basis. Most intermittent
    malfunctions are caused by poor contacts. In this case, it will be
    effective to shake suspected harness or connector by hand.
    When repairs are performed without any symptom check, no
    one can judge if malfunction has actually been eliminated.
q   After diagnosis, make sure to carry out "erase memory". Refer to
    BRC-22, "Operation Procedure" .                                                              SEF233G

q   For an intermittent malfunction, move harness or harness con-
    nector by hand to check poor contact or false open circuit.
q   Always read "GI General Information" to confirm general precautions. Refer to GI-4, "General Precau-
    tions" .




Revision: 2005 August                             BRC-10                                       2005 350Z
                        TROUBLE DIAGNOSIS
                                               [ABS]
DIAGNOSIS FLOWCHART
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                                            SFIA0953E




Revision: 2005 August        BRC-11         2005 350Z
                                         TROUBLE DIAGNOSIS
                                                                              [ABS]
ASKING COMPLAINTS
q   Complaints against malfunction vary depending on each person.
    It is important to clarify customer complaints.
q   Ask customer about what symptoms are present and under
    what conditions. Use information to reproduce symptom while
    driving.
q   It is also important to use diagnosis sheet so as not to miss infor-
    mation.



                                                                              SBR339B


EXAMPLE OF DIAGNOSIS SHEET




                                                                           SFIA0791E




Revision: 2005 August                               BRC-12                 2005 350Z
                           TROUBLE DIAGNOSIS
                                                  [ABS]
Component Parts Location                              AFS00291

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                                               SFIA1746E




Revision: 2005 August           BRC-13         2005 350Z
                        TROUBLE DIAGNOSIS
                                               [ABS]
Schematic -- ABS --                                AFS00292




                                            TFWT0042E




Revision: 2005 August        BRC-14         2005 350Z
                           TROUBLE DIAGNOSIS
                                                  [ABS]
Wiring Diagram -- ABS --                             AFS00293

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                                               TFWT0153E




Revision: 2005 August           BRC-15         2005 350Z
                        TROUBLE DIAGNOSIS
                                               [ABS]




                                            TFWT0208E




Revision: 2005 August        BRC-16         2005 350Z
                        TROUBLE DIAGNOSIS
                                               [ABS]

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                                            TFWT0165E




Revision: 2005 August        BRC-17         2005 350Z
                        TROUBLE DIAGNOSIS
                                               [ABS]




                                            TFWT0046E




Revision: 2005 August        BRC-18         2005 350Z
                                                TROUBLE DIAGNOSIS
                                                                                                                               [ABS]
Control Unit Input/Output Signal Standard                                                                                        AFS00294

REFERENCE VALUE FROM CONSULT-II                                                                                                             A
CAUTION:
The display shows the control unit calculation data, so a normal value might be displayed even in the
event the output circuit (harness) is open or short - circuited.                                                                            B
                                                                         Data monitor
                                                                                        Reference values     Reference: Error inspec-
       Monitor item          Display Content
                                                               Condition                for normal opera-         tion checklist            C
                                                                                               tion
                                                    Vehicle stopped                     0 km/h (0 MPH)
                          Wheel speed calcu-
                                                                                        Nearly matches                                      D
                          lated using signals                                                                BRC-30, "Inspection 1
  WHEEL SENSOR                                                                          the speedometer
                          from all four wheel       While driving (Note 1)                                   Wheel Sensor System"
                          sensors                                                       display (



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