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BRAKE CONTROL SYSTEM
F BRAKES
A
SECTION
BRAKE CONTROL SYSTEM
BRC B
C
D
E
CONTENTS
VDC/TCS/ABS ... 26 BRC
SELF-DIAGNOSIS ............................................. 27 .
PRECAUTIONS ......................................................... 3 . DATA MONITOR ................................................ 30 .
Precautions for Supplemental Restraint System ACTIVE TEST .................................................... 33 . G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- For Fast and Accurate Diagnosis .......................... 35 .
SIONER" ................................................................. 3
. PRECAUTIONS FOR DIAGNOSIS .................... 35 .
Precautions for Brake System ................................. 3 . Basic Inspection .................................................... 36.
Precautions for Brake Control ................................. 3 . H
BASIC INSPECTION 1: BRAKE FLUID
PREPARATION .......................................................... 5 . AMOUNT, LEAKS, AND BRAKE PADS INSPEC-
Special Service Tools .............................................. 5 . TION ................................................................... 36
.
Commercial Service Tools ....................................... 5 . BASIC INSPECTION 2: POWER SYSTEM TER- I
ON-VEHICLE SERVICE ............................................ 6 . MINAL LOOSENESS AND BATTERY INSPEC-
Adjustment of Steering Angle Sensor Neutral Posi- TION ................................................................... 36
.
tion .......................................................................... 6
. BASIC INSPECTION 3: ABS WARNING LAMP, J
Calibration of Decel G Sensor (AWD Model) .......... 6 . VDC OFF INDICATOR LAMP, SLIP INDICATOR
SYSTEM DESCRIPTION ........................................... 8 . LAMP AND BRAKE WARNING LAMP INSPEC-
System Diagram ...................................................... 8 . TION ................................................................... 37
.
VDC Function .......................................................... 8 . K
Inspection 1: Wheel Sensor Circuit ....................... 37 .
TCS Function .......................................................... 8 . Inspection 2: Engine System ................................. 39 .
ABS Function .......................................................... 8 . Inspection 3: VDC/TCS/ABS Control Unit Circuit ... 40
EBD Function .......................................................... 9 . Inspection 4: Pressure Sensor Circuit ................... 40 . L
Fail-Safe Function ................................................... 9 . Inspection 5: Steering Angle Sensor Circuit .......... 42 .
VDC / TCS SYSTEM ............................................ 9 . Inspection 6: Yaw Rate/Side G Sensor (2WD
ABS, EBD SYSTEM ............................................. 9 . Model), Yaw Rate/Side/Decel G sensor (AWD Mod- M
Hydraulic Circuit Diagram ..................................... 10 . els) Circuit .............................................................. 44
.
CAN COMMUNICATION ..........................................11 . Inspection 7: Solenoid and VDC Change-Over
System Description ................................................11 . Valve Circuit ........................................................... 46
.
TROUBLE DIAGNOSIS ........................................... 12 . Inspection 8: Actuator Motor Circuit ...................... 47 .
How to Proceed with Diagnosis ............................ 12 . Inspection 9: ABS Actuator and Electric Unit (Con-
BASIC CONCEPT .............................................. 12 . trol Unit) Power Supply and Ground Circuit ........... 48 .
DIAGNOSIS FLOWCHART ............................... 13 . Inspection 10: Stop Lamp Switch Circuit ............... 50 .
ASKING COMPLAINTS ..................................... 14 . Inspection 11: Brake Fluid Level Switch Circuit ..... 51 .
EXAMPLE OF DIAGNOSIS SHEET .................. 14 . Inspection 12: When "ST ANG SEN SIGNAL"
Component Installation Location ........................... 15 . Appears on Self-diagnosis Results Display ........... 52 .
Schematic ............................................................. 16. Inspection 13: When "DECEL G SEN SET" Appears
Wiring Diagram -- VDC -- .................................... 17 . on Self-diagnostic Results Display (AWD Model) ... 52
Control Unit Input/Output Signal Standard ............ 23 . Inspection 14: CAN Communication Circuit .......... 53 .
REFERENCE VALUE FROM CONSULT-II ........ 23 . Component Inspection ........................................... 53 .
CONSULT-II Functions .......................................... 25 . VDC OFF SWITCH ............................................ 53 .
CONSULT-II MAIN FUNCTION .......................... 25 . Symptom 1: Excessive ABS Function Operation
CONSULT-II BASIC OPERATION PROCEDURE
Revision: 2005 July BRC-1 2005 FX
Frequency .............................................................. 53
. ACTUATOR AND ELECTRIC UNIT (ASSEMBLY) ...60
Symptom 2: Unexpected Pedal Reaction .............. 54 . Removal and Installation ........................................60 .
Symptom 3: The Braking Distance is Long ............ 54 . REMOVAL ...........................................................60
.
Symptom 4: The ABS Function Does Not Operate 55 ... INSTALLATION ...................................................60.
Symptom 5: Pedal Vibration or ABS Operation G SENSOR ...............................................................62
.
Sound Occurs ........................................................ 55. Removal and Installation ........................................62 .
Symptom 6: Vehicle Jerks During VDC/TCS/ABS REMOVAL ...........................................................62
.
Control ................................................................... 55
. INSTALLATION ...................................................62.
WHEEL SENSORS .................................................. 57 . STEERING ANGLE SENSOR ..................................63 .
Removal and Installation ....................................... 57 . Removal and Installation ........................................63 .
REMOVAL .......................................................... 57 . REMOVAL ...........................................................63
.
INSTALLATION ................................................... 57 . INSTALLATION ...................................................63.
SENSOR ROTOR ..................................................... 59 .
Removal and Installation ....................................... 59 .
REMOVAL .......................................................... 59 .
INSTALLATION ................................................... 59 .
Revision: 2005 July BRC-2 2005 FX
PRECAUTIONS
[VDC/TCS/ABS]
PRECAUTIONS
[VDC/TCS/ABS] PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" AFS00289
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 AFS001S3
q Recommended fluid is brake fluid "DOT 3".
H
q Do not 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.
I
q Do not use mineral oils such as gasoline or kerosene to clean. They will ruin rubber parts and cause
improper operation.
q Using a flare nut crowfoot and torque wrench, securely tighten
J
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. K
q Before working, turn ignition switch OFF and disconnect electri-
cal connectors of ABS actuator and electric unit (control unit) or
battery negative terminal. L
q When installing brake piping, be sure to check torque.
WARNING: SBR686C
Clean brake pads and shoes with a waste cloth, then wipe with M
a dust collector.
Precautions for Brake Control AFS001S4
q During VDC/TCS/ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This
is normal.
q Just after starting vehicle after turning ignition switch ON, brake pedal may vibrate or motor operating
noise may be heard from engine room. 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
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.
Revision: 2005 July BRC-3 2005 FX
PRECAUTIONS
[VDC/TCS/ABS]
q If there is a radio, antenna, or antenna lead-in wire (including wiring) near control module, VDC/TCS/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, bushing, 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 the
brakes may cause VDC OFF indicator lamp and SLIP indicator lamp 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. 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 VDC OFF indicator lamp and SLIP
indicator lamp may turn on. However, this is not a malfunction, if normal operation can be resumed after
restarting engine.
q Sudden turns (such as spin turns, acceleration turns), drifting, etc. When VDC function is OFF (VDC OFF
SW ON) may cause the G sensor system indicate a malfunction. However, this is not a malfunction, if nor-
mal operation can be resumed after restarting engine.
Revision: 2005 July BRC-4 2005 FX
PREPARATION
[VDC/TCS/ABS]
PREPARATION PFP:00002
A
Special Service Tools AFS001S7
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
ST30720000
(J 25405)
Drift D
a: 77 mm (3.03 in) dia.
b: 55 mm (2.17 in) dia.
ZZA0701D
E
ST27863000
(--)
BRC
Drift Installing rear sensor rotor
a: 75 mm (2.95 in) dia.
b: 62 mm (2.44 in) dia.
ZZA0832D G
KV40104710
(--) H
Drift
a: 76 mm (2.99 in) dia.
b: 68.5 mm (2.697 in) dia.
I
ZZA0832D
Commercial Service Tools AFS001S8
J
Tool name Description
K
1: Flare nut crowfoot
a: 10 mm (0.39 in)
Removing and installing each brake piping
: 12 mm (0.47 in)
2: Torque wrench L
S-NT360
M
Revision: 2005 July BRC-5 2005 FX
ON-VEHICLE SERVICE
[VDC/TCS/ABS]
ON-VEHICLE SERVICE PFP:00000
Adjustment of Steering Angle Sensor Neutral Position AFS001S9
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 ABS actuator and electric unit (control unit) -
Replacing ABS actuator and electric unit (control unit) ◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo