Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti Q45 FY33 F50 2001-2006 Approved 2003_Q45 brc
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BRAKE CONTROL SYSTEM
F BRAKES
A
B
SECTION
BRAKE CONTROL SYSTEM C
D
E
CONTENTS
PRECAUTIONS ......................................................... 3 . CONSULT-II Functions .......................................... 26 . BRC
Precautions for Supplemental Restraint System CONSULT-II MAIN FUNCTION .......................... 26 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- SELF-DIAGNOSIS ............................................. 27 .
SIONER" ................................................................. 3
. DATA MONITOR ................................................ 30 . G
Precautions for Brake System ................................. 3 . ACTIVE TEST .................................................... 32 .
Precautions for Brake Control ................................. 3 . For Fast and Accurate Diagnosis .......................... 36 .
Diagnosis Precaution .............................................. 4 . PRECAUTIONS FOR DIAGNOSIS .................... 36 .
H
CAN SYSTEM ...................................................... 4 . Basic Inspection .................................................... 38 .
Precaution for Harness Repair ................................ 4 . BASIC INSPECTION 1: BRAKE FLUID LEVEL
CAN SYSTEM ...................................................... 4 . AND LEAK INSPECTION ................................... 38 .
PREPARATION .......................................................... 5 . BASIC INSPECTION 2: INSPECTION FOR I
Special Service Tools .............................................. 5 . LOOSENESS OF POWER SYSTEM TERMI-
Commercial Service Tools ....................................... 5 . NALS .................................................................. 38
.
ON-VEHICLE SERVICE ............................................ 6 . BASIC INSPECTION 3: INSPECTION OF ABS J
Adjustment of Steering Angle Sensor Neutral Posi- WARNING LAMP, VDC OFF INDICATOR LAMP,
tion .......................................................................... 6
. AND SLIP INDICATOR LAMP ............................ 38 .
SYSTEM DESCRIPTION ........................................... 7 . Inspection 1 Wheel Sensor System ....................... 39 .
K
Fail-Safe .................................................................. 7
. INSPECTION PROCEDURE ............................. 39 .
ABS SYSTEM ...................................................... 7 . Inspection 2 Engine System .................................. 41 .
VDC/TCS SYSTEM .............................................. 7 . Inspection 3 VDC/TCS/ABS Control Unit System... 41
Hydraulic Circuit Diagram ....................................... 7 . Inspection 4 Pressure Sensor and Circuit Between L
ABS Function .......................................................... 7 . Pressure Sensor and VDC/TCS/ABS Control Unit 42 ...
TCS Function .......................................................... 8 . Inspection 5 Steering Angle Sensor and Circuit
VDC Function .......................................................... 8 . Between Steering Angle Sensor and VDC/TCS/ M
System Diagram ...................................................... 8 . ABS Control Unit ................................................... 43 .
CAN COMMUNICATION ........................................... 9 . Inspection 6 Yaw Rate/Side G-Sensor and Circuit
System Description ................................................. 9 . Between Yaw Rate/Side G-Sensor and VDC/TCS/
FOR VDC MODELS ............................................. 9 . ABS Control Unit ................................................... 45 .
FOR ICC MODELS ............................................ 10 . Inspection 7 Solenoid, VDC Switching Valve, and
TROUBLE DIAGNOSIS ........................................... 12 . Circuits ................................................................... 46
.
How to Proceed With Diagnosis ............................ 12 . Inspection 8 Actuator Motor, Motor Relay, and Cir-
BASIC CONCEPT .............................................. 12 . cuit ......................................................................... 48
.
DIAGNOSIS FLOWCHART ............................... 13 . Inspection 9 Actuator Relay and Circuit ................ 50 .
ASKING COMPLAINTS ..................................... 14 . Inspection 10 Stop Lamp Switch and Circuit ......... 52 .
EXAMPLE OF DIAGNOSIS SHEET .................. 14 . Inspection 11 VDC/TCS/ABS Control Unit Power
Component Installation Location ........................... 15 . Circuit .................................................................... 53
.
Schematic ............................................................. 16. Inspection 12 When "SHIFT POSITION ERROR"
Wiring Diagram -- VDC -- .................................... 17 . Appears in Self-Diagnosis Results Display ........... 55 .
Control Unit Input/Output Signal Standard ............ 25 . Inspection 13 When "EMERGENCY BRAKE"
STANDARDS BY CONSULT-II ........................... 25 . Appears on Self-Diagnosis Results Display .......... 55 .
Revision; 2004 April BRC-1 2003 Q45
Inspection 14 When "STEERING ANGLE SENSOR TCS/ABS Operation. ..............................................66 .
HAS NOT BEEN CORRECTED" Appears on Self- WHEEL SENSORS ..................................................67 .
Diagnosis Results Display ..................................... 56 . Removal and Installation ........................................67 .
Inspection 15 Brake Fluid Level in Reservoir Tank, REMOVAL ...........................................................67
.
Communication Circuit Between VDC/TCS/ABS INSTALLATION ...................................................67.
Control Unit and Brake Fluid Level Sensor ........... 56 . VDC/TCS/ABS CONTROL UNIT .............................68 .
Inspection 16 CAN Communications Lines, VDC/ Removal and Installation ........................................68 .
TCS/ABS Control Unit and Steering Angle Sensor REMOVAL ...........................................................68
.
System ................................................................... 57
. INSTALLATION ...................................................68.
Inspecting Components ......................................... 58 . SENSOR ROTOR .....................................................69 .
VDC OFF SWITCH ............................................ 58 . Removal and Installation ........................................69 .
VDC RELAY BOX ............................................... 58 . REMOVAL ...........................................................69
.
VDC/TCS/ABS ACTUATOR ............................... 59 . INSTALLATION ...................................................69.
Symptom 1 ABS Works Frequently. ...................... 61 . VDC/TCS/ABS ACTUATOR .....................................70 .
Symptom 2 Unexpected Pedal Reaction ............... 61 . Removal and Installation ........................................70 .
Symptom 3 Long Stopping Distance ...................... 62 . G SENSOR ...............................................................71
.
Symptom 4 ABS Does Not Work. .......................... 63 . Removal and Installation ........................................71 .
Symptom 5 Pedal Vibration and Noise .................. 63 . REMOVAL ...........................................................71
.
Symptom 6 VDC OFF Indicator Lamp Does Not Illu- INSTALLATION ...................................................71.
minate. ................................................................... 65
. STEERING ANGLE SENSOR ..................................72 .
Symptom 7 SLIP Indicator Lamp Does Not Illumi- Removal and Installation ........................................72 .
nate. ....................................................................... 65
. REMOVAL ...........................................................72
.
Symptom 8 Vehicle Behaves Jerkily During VDC/ INSTALLATION ...................................................72.
Revision; 2004 April BRC-2 2003 Q45
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EFS00285
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 harness connec-
tors.
G
Precautions for Brake System EFS00209
q Recommended fluid is brake fluid "DOT 3".
H
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.
I
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
J
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 VDC actuator and control module or battery
terminals. L
q When installing brake piping, be sure to check torque.
SBR686C
M
Precautions for Brake Control EFS0020A
q During ABS, TCS and VDC operations of sudden deceleration and turn, 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.
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.
Revision; 2004 April BRC-3 2003 Q45
PRECAUTIONS
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 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 and VDC warning lamp may turn on.
q If non-standard engine components (muffler, etc.) are attached, VDC may not operate normally and VDC
warning lamp may turn on.
q When driving on a steep slope (as a bank), VDC may not operate normally and VDC warning lamp may
turn on. In this case, start engine to resume the normal screen. This is normal.
Diagnosis Precaution EFS0020B
CAN SYSTEM
q Do not apply voltage of 7.0V or higher to terminal to be measured.
q Maximum open terminal voltage of tester in use shall be 7.0V or lower.
q Before checking harnesses, turn ignition switch to OFF and disconnect battery negative cable.
Precaution for Harness Repair EFS0020C
CAN SYSTEM
q Area to be repaired shall be soldered, and wrapped with a tape
(be sure that fraying of twisted wire shall be within 110 mm 4.33
in)).
PKIA0306E
q Do not make a bypass connection to repaired area. (If it is done,
branch part will be removed and characteristics of twisted wire
will be lost.)
PKIA0307E
Revision; 2004 April BRC-4 2003 Q45
PREPARATION
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
ST3072 000
(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
ST2786 3000 BRC
(--) Installing rear sensor rotor.
Drift
G
ZZC1307D
H
KV401 04710
(--) Installing rear sensor rotor.
Drift
I
ZZC1082D
Commercial Service Tools EFS0020D
J
Tool name Description
K
1.Flare nut crowfoot
a:10 mm (0.39 in) Removing and installing each brake piping
2.Torque wrench L
S-NT360
M
Revision; 2004 April BRC-5 2003 Q45
ON-VEHICLE SERVICE
ON-VEHICLE SERVICE PFP:00000
Adjustment of Steering Angle Sensor Neutral Position EFS0020E
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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