Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti Q45 FY33 F50 2001-2006 Approved 2005_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 Control Unit Input/Output Signal Standard ............ 23 . BRC
STANDARDS BY CONSULT-II ........................... 23 .
PRECAUTIONS ......................................................... 3 . CONSULT-II Functions .......................................... 24 .
Precautions for Supplemental Restraint System CONSULT-II MAIN FUNCTION .......................... 24 . G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- SELF-DIAGNOSIS ............................................. 25 .
SIONER" ................................................................. 3
. DATA MONITOR ................................................ 28 .
Precautions for Brake System ................................. 3 . ACTIVE TEST .................................................... 30 .
Precautions for Brake Control ................................. 3 . H
For Fast and Accurate Diagnosis .......................... 34 .
PREPARATION .......................................................... 5 . PRECAUTIONS FOR DIAGNOSIS .................... 34 .
Special Service Tools .............................................. 5 . Basic Inspection .................................................... 35 .
Commercial Service Tools ....................................... 5 . BASIC INSPECTION 1: BRAKE FLUID LEVEL, I
ON-VEHICLE SERVICE ............................................ 6 . LEAKAGE AND BRAKE PAD ............................. 35 .
Adjustment of Steering Angle Sensor Neutral Posi- BASIC INSPECTION 2: POWER SUPPLY CIR-
tion .......................................................................... 6
. CUIT TERMINAL LOOSENESS AND BATTERY 35 ... J
SYSTEM DESCRIPTION ........................................... 7 . BASIC INSPECTION 3: ABS WARNING LAMP,
System Diagram ...................................................... 7 . VDC OFF INDICATOR LAMP, BRAKE WARNING
Functions ................................................................. 7
. LAMP AND SLIP INDICATOR LAMP ................. 35 .
VDC ...................................................................... 7
. K
Inspection 1 Wheel Sensor System ....................... 35 .
TCS ...................................................................... 7
. Inspection 2 Engine System .................................. 38 .
ABS ...................................................................... 7
. Inspection 3: VDC/TCS/ABS Control Unit Circuit ... 38
EBD ...................................................................... 7
. Inspection 4 Pressure Sensor System .................. 38 . L
Operation that is not "System Error" ....................... 8 . Inspection 5 Steering Angle Sensor System ......... 40 .
VDC ...................................................................... 8
. Inspection 6 Yaw Rate/Side G Sensor System ..... 42 .
TCS ...................................................................... 8
. Inspection 7 Solenoid and VDC Switching Valve M
ABS ...................................................................... 8
. System ................................................................... 44
.
Fail-Safe Function ................................................... 8 . Inspection 8 Actuator Motor and Motor Relay Sys-
VDC/TCS SYSTEM .............................................. 8 . tem ......................................................................... 46
.
ABS, EBD SYSTEM ............................................. 8 . Inspection 9 Actuator Relay System ...................... 49 .
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 System .............................................. 51 .
TROUBLE DIAGNOSIS ............................................11 . Inspection 12 Park/Neutral Position Switch System 53 ...
How to Perform Trouble Diagnosis For Quick and Inspection 13 Brake Fluid Level Switch System .... 53 .
Accurate Repair .....................................................11 . Inspection 14: CAN Communication Lines System 54 ...
INTRODUCTION .................................................11 . Inspecting Components ......................................... 54 .
DIAGNOSIS FLOW CHART .............................. 12 . VDC OFF SWITCH ............................................ 54 .
ASKING COMPLAINTS ..................................... 13 . PARKING BRAKE SWITCH ............................... 55 .
EXAMPLE OF DIAGNOSIS SHEET .................. 13 . BRAKE FLUID LEVEL SWITCH ........................ 55 .
Component Installation Location ........................... 14 . VDC RELAY BOX ............................................... 55 .
Schematic ............................................................. 15. VDC/TCS/ABS ACTUATOR ............................... 56 .
Wiring Diagram -- VDC -- .................................... 16 .
Edition; 2004 May BRC-1 2005 Q45
Symptom 1 ABS Works Frequently. ...................... 57 . VDC/TCS/ABS CONTROL UNIT .............................63 .
Symptom 2 Unexpected Pedal Reaction ............... 57 . Removal and Installation ........................................63 .
Symptom 3 The Braking Distance Is Long ............ 58 . REMOVAL ...........................................................63
.
Symptom 4 The ABS Function Does Not Operate... 58 INSTALLATION ...................................................63.
Symptom 5 Pedal Vibration or ABS Operation SENSOR ROTOR .....................................................64 .
Sound Occurs ........................................................ 58. Removal and Installation ........................................64 .
Symptom 6: Vehicle Jerks During VDC/TCS/ABS REMOVAL ...........................................................64
.
Control ................................................................... 58
. INSTALLATION ...................................................64.
Symptom 7: ABS Warning Lamp Indication Is Not VDC/TCS/ABS ACTUATOR .....................................65 .
Normal ................................................................... 59
. Removal and Installation ........................................65 .
Symptom 8: Slip Indicator Lamp Indication Is Not COMPONENTS ..................................................65 .
Normal ................................................................... 59
. REMOVAL ...........................................................65
.
Symptom 9: VDC OFF Indicator Lamp Indication Is INSTALLATION ...................................................66.
Not Normal ............................................................ 60
. G SENSOR ...............................................................67
.
WHEEL SENSORS .................................................. 61 . Removal and Installation ........................................67 .
Removal and Installation ....................................... 61 . REMOVAL ...........................................................67
.
REMOVAL .......................................................... 61 . INSTALLATION ...................................................67.
INSTALLATION ................................................... 61 . STEERING ANGLE SENSOR ..................................68 .
Removal and Installation ........................................68 .
REMOVAL ...........................................................68
.
INSTALLATION ...................................................68.
Edition; 2004 May BRC-2 2005 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" EFS004YZ
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 EFS004YG
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. 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. They will ruin rubber parts of the hydraulic system.
q Use flare nut wrench when removing brake tube and use flare
nut torque wrench when installing brake tube.
J
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-
nector of VDC/TCS/ABS control unit or battery negative termi-
nal.
q When installing brake piping, be sure to check torque. L
WARNING: SBR686C
Clean brakes with a vacuum dust collector to minimize risk of
health hazard from powder caused by friction. M
Precautions for Brake Control EFS004YH
q Just after starting vehicle after 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 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.
Edition; 2004 May BRC-3 2005 Q45
PRECAUTIONS
[VDC/TCS/ABS]
q If non-standard suspension parts (shock absorber, strut, spring, bushing, etc.) and reinforcements (roll
bar, tower bar, etc.) are attached, or if suspension parts deteriorate significantly, VDC may not operate
normally, VDC OFF indicator lamp and SLIP indicator lamp may turn on.
q If non-standard engine components (muffler, etc.) are attached, VDC may not operate normally, VDC OFF
indicator lamp and SLIP indicator lamp may turn on.
Edition; 2004 May BRC-4 2005 Q45
PREPARATION
[VDC/TCS/ABS]
PREPARATION PFP:00002
A
Special Service Tools EFS00288
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: 76.5 mm (3.012 in) dia.
b: 55.0 mm (2.17 in) dia.
ZZC0760D
E
ST27863000
(--)
Drift
a: 75 mm (2.95 in) dia. BRC
b: 62 mm (2.44 in) dia.
Installing rear sensor rotor.
KV40104710
G
(--)
Drift
ZZA0832D
a: 76 mm (2.99 in) dia.
b: 68.5 mm (2.697 in) dia. H
Commercial Service Tools EFS0020D
Tool name Description I
1.Flare nut crowfoot J
a:10 mm (0.39 in)/12 mm (0.47 in) Removing and installing each brake piping
2.Torque wrench
K
S-NT360
L
M
Edition; 2004 May BRC-5 2005 Q45
ON-VEHICLE SERVICE
[VDC/TCS/ABS]
ON-VEHICLE SERVICE PFP:00000
Adjustment of Steering Angle Sensor Neutral Position EFS004YI
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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