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BRAKE CONTROL SYSTEM

F BRAKES

B
SECTION
BRAKE CONTROL SYSTEM C

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 Battery Service ............................... 3 . Data Monitor .......................................................... 29
.
Precautions for Brake System ................................. 3 . H
OPERATION PROCEDURE ............................... 29 .
Precautions for Brake Control ................................. 3 . DISPLAY ITEM LIST .......................................... 29 .
PREPARATION .......................................................... 5 . Active Test ............................................................. 31
.
Special Service Tools .............................................. 5 . OPERATION PROCEDURE ............................... 31 . I
Commercial Service Tools ....................................... 5 . TEST ITEM ......................................................... 32
.
ON-VEHICLE SERVICE ............................................ 6 . For Fast and Accurate Diagnosis .......................... 33 .
Adjustment of Steering Angle Sensor Neutral Posi- PRECAUTIONS FOR DIAGNOSIS .................... 33 . J
tion .......................................................................... 6
. Basic Inspection .................................................... 34
.
SYSTEM DESCRIPTION ........................................... 7 . BRAKE FLUID LEVEL AND LEAK INSPECTION 34 ...
System Diagram ...................................................... 7 . INSPECTION FOR LOOSENESS OF POWER
VDC Function .......................................................... 7 . K
SYSTEM TERMINALS ....................................... 34 .
TCS Function .......................................................... 7 . INSPECTION OF ABS WARNING LAMP,
ABS Function .......................................................... 8 . VDC OFF INDICATOR LAMP AND SLIP INDI-
EBD Function .......................................................... 8 . CATOR LAMP .................................................... 35 . L
Hydraulic Pressure Control System Diagram .......... 8 . TROUBLE DIAGNOSIS FOR SYSTEM ................... 36 .
CAN Communication ............................................... 8 . Wheel Sensor System ........................................... 36 .
SYSTEM DESCRIPTION ..................................... 8 . Engine System ...................................................... 38. M
TROUBLE DIAGNOSIS ............................................. 9 . VDC/TCS/ABS Control Unit 1 ................................ 38 .
Fail-Safe Function ................................................... 9 . Pressure Sensor System ....................................... 38 .
VDC/TCS SYSTEM .............................................. 9 . Steering Angle Sensor System .............................. 39 .
ABS, EBD SYSTEM ............................................. 9 . Yaw Rate/Side G Sensor System .......................... 41 .
How to Perform Trouble Diagnoses ........................ 9 . Solenoid and VDC Change-Over Valve System .... 43 .
BASIC CONCEPT ................................................ 9 . Actuator Motor and Motor Relay System ............... 44 .
DIAGNOSIS FLOW CHART .............................. 10 . Actuator Relay System .......................................... 46 .
ASKING COMPLAINTS ......................................11 . Stop Lamp Switch System ..................................... 47 .
EXAMPLE OF DIAGNOSIS SHEET ...................11 . VDC/TCS/ABS Control Unit Power and Ground
Component Parts Location .................................... 12 . System ................................................................... 48
.
Schematic ............................................................. 13. When "SHIFT POSITION ERROR" Appears in Self-
Wiring Diagram -- VDC -- .................................... 14 . Diagnostic results Display (A/T Models) ................ 49 .
Control Unit Input/Output Signal Standard ............ 22 . VDC/TCS/ABS Control Unit 2 ................................ 50 .
STANDARDS BY CONSULT-II ........................... 22 . Brake Fluid Level Switch System .......................... 50 .
CONSULT-II Functions (VDC/TCS/ABS) .............. 24 . RAS Control Unit System (With RAS) ................... 51 .
CONSULT-II MAIN FUNCTION .......................... 24 .

Revision: 2006 August BRC-1 2006 G35 Coupe
CAN Communication Circuit .................................. 52 . VDC/TCS/ABS CONTROL UNIT .............................59 .
Component Inspection ........................................... 52
. Removal and Installation ........................................59 .
VDC OFF SWITCH ............................................. 52. REMOVAL ...........................................................59
.
ABS MOTOR RELAY AND ACTUATOR RELAY... 52 INSTALLATION ...................................................59.
VDC/TCS/ABS ACTUATOR ............................... 53 . SENSOR ROTOR .....................................................60 .
TROUBLE DIAGNOSIS FOR SYMPTOMS ............. 54 . Removal and Installation ........................................60 .
Excessive ABS Function Operation Frequency ..... 54 . REMOVAL ...........................................................60
.
Unexpected Pedal Reaction .................................. 54 . INSTALLATION ...................................................60.
The Braking Distance Is Long ................................ 55. VDC/TCS/ABS ACTUATOR .....................................61 .
The ABS Function Does Not Operate ................... 55 . Removal and Installation ........................................61 .
Pedal Vibration or ABS Operation Sound Occurs... 56 G-SENSOR ...............................................................62
.
Vehicle Jerks During VDC/TCS/ABS Control ........ 56 . Removal and Installation ........................................62 .
WHEEL SENSOR ..................................................... 58
. REMOVAL ...........................................................62
.
Removal and Installation ....................................... 58
. INSTALLATION ...................................................62.
REMOVAL .......................................................... 58
. STEERING ANGLE SENSOR ..................................63 .
INSTALLATION ................................................... 58
. Removal and Installation ........................................63 .
REMOVAL ...........................................................63
.
INSTALLATION ...................................................63.

Revision: 2006 August BRC-2 2006 G35 Coupe
PRECAUTIONS
[VDC/TCS/ABS]
PRECAUTIONS
[VDC/TCS/ABS] PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" NFS000KN

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 NFS000KO

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 NFS0006H

q Recommended fluid is brake fluid "DOT 3". Refer to MA-10, "RECOMMENDED FLUIDS AND LUBRI-
CANTS" . J
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. K
q Do not use mineral oils such as gasoline or kerosene to clean. They will ruin rubber parts and cause
improper operation.
q Use a flare nut wrench when removing flare nuts, and use a flare L
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
M
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 cable from
the negative terminal.
q When installing brake piping, be sure to check torque.
WARNING: SBR686C
Clean brake pads and shoes with a waste cloth, then wipe with
a dust collector.
Precautions for Brake Control NFS0006I

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.

Revision: 2006 August BRC-3 2006 G35 Coupe
PRECAUTIONS
[VDC/TCS/ABS]
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.
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 Coupe
PREPARATION
[VDC/TCS/ABS]
PREPARATION PFP:00002
A
Special Service Tools NFS0006J

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 NFS0006K
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

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

Adjustment of Steering Angle Sensor Neutral Position NFS0006L

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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