Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti Q45 FY33 F50 2001-2006 Approved 2006_Q45 brc
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BRAKE CONTROL SYSTEM
F BRAKES
A
SECTION
BRAKE CONTROL SYSTEM
BRC B
C
D
E
CONTENTS
VDC/TCS/ABS Wiring Diagram -- VDC -- .................................... 15 . BRC
Control Unit Input/Output Signal Standard ............ 22 .
PRECAUTIONS ......................................................... 3 . VDC/TCS/ABS CONTROL UNIT INSPECTION
Precautions for Supplemental Restraint System TABLE ................................................................ 22
. G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- CONSULT-II Functions (VDC) ............................... 23 .
SIONER" ................................................................. 3
. CONSULT-II MAIN FUNCTION .......................... 23 .
Precautions for Brake System ................................. 3 . CONSULT-II SETTING PROCEDURE ............... 24 .
Precautions for Brake Control ................................. 3 . H
SELF-DIAG RESULT MODE .............................. 24 .
PREPARATION .......................................................... 5 . DATA MONITOR MODE ..................................... 27 .
Special Service Tools .............................................. 5 . ACTIVE TEST .................................................... 30 .
Commercial Service Tools ....................................... 5 . VDC/TCS/ABS CONTROL UNIT PART NUM- I
ON-VEHICLE SERVICE ............................................ 6 . BER .................................................................... 32
.
Adjustment of Steering Angle Sensor Neutral Posi- Trouble Diagnosis Chart for Symptoms ................. 32 .
tion .......................................................................... 6
. For Fast and Accurate Diagnosis .......................... 34 . J
SYSTEM DESCRIPTION ........................................... 7 . PRECAUTIONS FOR DIAGNOSIS .................... 34 .
System Diagram ...................................................... 7 . Basic Inspection .................................................... 34
.
COMPONENTS FUNCTION DESCRIPTION ...... 7 . BRAKE FLUID LEVEL, LEAKAGE AND BRAKE
Functions ................................................................. 7
. K
PAD .................................................................... 34
.
VDC ...................................................................... 7
. POWER SUPPLY CIRCUIT TERMINAL LOOSE-
TCS ...................................................................... 8
. NESS AND BATTERY ........................................ 35 .
ABS ...................................................................... 8
. ABS WARNING LAMP, VDC OFF INDICATOR L
EBD ...................................................................... 8
. LAMP, AND SLIP INDICATOR LAMP ................ 35 .
Operation that is not "System Error" ....................... 8 . TROUBLE DIAGNOSIS FOR SYSTEM ................... 36 .
VDC ...................................................................... 8
. Wheel Sensor ........................................................ 36
. M
TCS ...................................................................... 8
. INSPECTION PROCEDURE ............................. 36 .
ABS ...................................................................... 8
. Engine System Control Signal ............................... 38 .
Hydraulic Circuit Diagram ....................................... 9 . INSPECTION PROCEDURE ............................. 38 .
CAN Communication ............................................... 9 . VDC/TCS/ABS Control Unit ................................... 38 .
SYSTEM DESCRIPTION ..................................... 9 . INSPECTION PROCEDURE ............................. 38 .
TROUBLE DIAGNOSIS ........................................... 10 . Pressure Sensor .................................................... 39.
Fail-Safe Function ................................................. 10 . INSPECTION PROCEDURE ............................. 39 .
VDC/TCS SYSTEM ............................................ 10 . Steering Angle Sensor ........................................... 40 .
ABS, EBD SYSTEM ........................................... 10 . INSPECTION PROCEDURE ............................. 40 .
How to Perform Trouble Diagnosis For Quick and Yaw Rate/Side G Sensor ....................................... 42 .
Accurate Repair .................................................... 10 . INSPECTION PROCEDURE ............................. 42 .
INTRODUCTION ................................................ 10 . Solenoid and VDC Switching Valve ....................... 44 .
DIAGNOSIS FLOW CHART ...............................11 . INSPECTION PROCEDURE ............................. 44 .
ASKING COMPLAINTS ..................................... 12 . Actuator Motor and Motor Relay ............................ 46 .
EXAMPLE OF DIAGNOSIS SHEET .................. 12 . INSPECTION PROCEDURE ............................. 46 .
Component Installation Location ........................... 13 . Actuator Relay ....................................................... 48
.
Schematic ............................................................. 14.
Revision: 2005 November BRC-1 2006 Q45
INSPECTION PROCEDURE .............................. 48 . WHEEL SENSORS ..................................................63 .
Stop Lamp Switch .................................................. 49
. Removal and Installation ........................................63 .
INSPECTION PROCEDURE .............................. 49 . REMOVAL ...........................................................63
.
VDC/TCS/ABS Control Unit Power Supply And INSTALLATION ...................................................63.
Ground Circuit ....................................................... 50
. VDC/TCS/ABS CONTROL UNIT .............................65 .
INSPECTION PROCEDURE .............................. 50 . Removal and Installation ........................................65 .
Park/Neutral Position Switch ................................. 51 . REMOVAL ...........................................................65
.
INSPECTION PROCEDURE .............................. 51 . INSTALLATION ...................................................65.
Brake Fluid Level Switch ....................................... 53. SENSOR ROTOR .....................................................66 .
INSPECTION PROCEDURE .............................. 53 . Removal and Installation ........................................66 .
VDC OFF Switch ................................................... 54
. REMOVAL ...........................................................66
.
INSPECTION PROCEDURE .............................. 54 . INSTALLATION ...................................................66.
CAN Communication Circuit .................................. 54 . ACTUATOR ..............................................................67
.
INSPECTION PROCEDURE .............................. 54 . Removal and Installation ........................................67 .
RAS Control Unit (With RAS) ................................ 55 . COMPONENTS ..................................................67 .
INSPECTION PROCEDURE .............................. 55 . REMOVAL ...........................................................67
.
Inspecting Components ......................................... 55 . INSTALLATION ...................................................68.
VDC OFF SWITCH ............................................. 55 . G SENSOR ...............................................................69
.
PARKING BRAKE SWITCH ............................... 56 . Removal and Installation ........................................69 .
VDC RELAY BOX ............................................... 56 . REMOVAL ...........................................................69
.
VDC ACTUATOR ................................................ 57 . INSTALLATION ...................................................69.
TROUBLE DIAGNOSIS FOR SYMPTOMS ............. 58 . STEERING ANGLE SENSOR ..................................70 .
Excessive ABS Function Operation Frequency ..... 58 . Removal and Installation ........................................70 .
Unexpected Pedal Reaction .................................. 58 . REMOVAL ...........................................................70
.
The Braking Distance Is Long ................................ 59 . INSTALLATION ...................................................70.
The ABS Function Does Not Operate ................... 59 . RELAY BOX .............................................................71
.
Pedal Vibration or ABS Operation Sound Occurs... 59 Removal and Installation ........................................71 .
Vehicle Jerks During VDC/TCS/ABS Control ........ 60 . REMOVAL ...........................................................71
.
ABS Warning Lamp Indication Is Not Normal ........ 60 . INSTALLATION ...................................................71.
Slip Indicator Lamp Indication Is Not Normal ........ 61 .
VDC OFF Indicator Lamp Indication Is Not Normal 61 ...
Revision: 2005 November BRC-2 2006 Q45
PRECAUTIONS
[VDC/TCS/ABS]
PRECAUTIONS
[VDC/TCS/ABS] PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" NFS000CE
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 NFS000OG
q Recommended fluid is brake fluid "DOT 3". Refer to Refer to Service Manual.
H
q Do not reuse drained brake fluid.
q Be careful not to splash brake fluid on painted surface of body. If brake fluid is splashed on painted sur-
faces of body immediately wipe it off with cloth and then wash it away with water.
I
q Do not use mineral oils such as gasoline or kerosene to clean. They will ruin rubber parts and cause
improper operation.
q Use a flare nut wrench when removing flare nuts, and use a flare
J
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
is detected, replace part with a new one. K
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. 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 NFS000OH
q During ABS operation, brake pedal lightly vibrates and a mechanical sound may be heard. This is normal.
q Just after starting vehicle after turning ignition switch ON, brake pedal may vibrate or motor operating
sound may be heard from engine compartment. This is a normal condition of operation check.
q Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
q When an error is indicated by ABS or another warning lamp, collect all necessary information from cus-
tomer (what symptoms are present under what conditions) and check for simple causes before starting
diagnostic servicing. Besides electrical system inspection, check brake booster operation, brake fluid
level, and fluid leaks.
q If tire size and type are used in an improper combination, or brake pads are not Genuine NISSAN parts,
stopping distance or steering stability may deteriorate.
q If there is a radio, antenna, or antenna lead-in wire (including wiring) near VDC/TCS/ABS control unit,
ABS function may have a malfunction or error.
Revision: 2005 November BRC-3 2006 Q45
PRECAUTIONS
[VDC/TCS/ABS]
q If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness
pinches, open circuits, and improper wiring.
q If the following components are replaced with non-genuine components or converted, VDC OFF indicator
lamp and SLIP indicator lamp may turn on or the VDC system may not operate properly. Components
related to suspension (shock absorber, strut, spring, bush, etc.), Tires, wheels (exclude specified size),
components related to brake (pad, rotor, caliper, etc.), Components related to engine (Muffler, ECM, etc.),
Components related to body reinforcement (roll bar, Tower bar, etc.).
q Driving in the condition of breakage or excessive wear of suspension, tires or components related to
brakes may cause VDC OFF indicator lamp and SLIP indicator lamp to turn on, and the VDC system
may not operate properly.
q When the TCS or VDC is activated by sudden acceleration or sudden turn, some sound may occur if
brake pedal is used. The sound is a result of the normal operation of the TCS and VDC.
q When driving on roads which have extreme slopes (such as mountainous roads) or high banks (such as
sharp carves on a freeway), the VDC may not operate normally, or VDC OFF indicator lamp or VDC OFF
indicator lamp and SLIP indicator lamp may turn on. However, this is not a malfunction, if normal opera-
tion can be resumed after restarting engine.
q Sudden turns (such as spin turns, acceleration turns), drifting, etc. When VDC function is OFF (VDC OFF
switch ON) may cause yaw rate/side G sensor system to indicate a malfunction. However, this is not a
malfunction if normal operation can be resumed after restarting engine. Then erase memory of self-diag-
nosis.
Revision: 2005 November BRC-4 2006 Q45
PREPARATION
[VDC/TCS/ABS]
PREPARATION PFP:00002
A
Special Service Tools NFS000CH
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
ST30720000 Installing rear sensor rotor.
C
(J-25405)
Drift
a: 77 mm (3.03 in) dia.
b: 55.5 mm (2.19 in) dia. D
ZZC0760D
ST27863000 Installing rear sensor rotor.
E
( -- )
Drift
a: 74.5 mm (2.93 in) dia. BRC
b: 62.5 mm (2.46 in) dia.
KV40104710
( -- ) G
Drift
ZZA0832D
a: 76.3 mm (3.00 in) dia.
b: 67.9 mm (2.67 in) dia.
H
Commercial Service Tools NFS000CI
Tool name Description
I
1.Flare nut crowfoot Removing and installing each brake piping
a:10 mm (0.39 in)/12 mm (0.47 in)
2.Torque wrench
J
S-NT360 K
L
M
Revision: 2005 November BRC-5 2006 Q45
ON-VEHICLE SERVICE
[VDC/TCS/ABS]
ON-VEHICLE SERVICE PFP:00000
Adjustment of Steering Angle Sensor Neutral Position NFS000CJ
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.
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