Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti Q45 FY33 F50 2001-2006 Approved 2003_Q45 br
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BRAKE SYSTEM
F BRAKES
A
B
SECTION
BRAKE SYSTEM C
D
E
CONTENTS
PRECAUTIONS ......................................................... 3. INSTALLATION .................................................. 13 . BR
Precautions for Supplemental Restraint System Disassembly and Assembly ................................... 14 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- DISASSEMBLY .................................................. 14 .
SIONER" ................................................................. 3
. INSPECTION AFTER DISASSEMBLY ............... 16 . G
Precautions for Brake System ................................. 3 . ASSEMBLY ........................................................ 16.
PREPARATION .......................................................... 4
. BRAKE BOOSTER .................................................. 21 .
Commercial Service Tools ....................................... 4 . On-Vehicle Service ................................................ 21.
H
NOISE, VIBRATION AND HARSHNESS (NVH) OPERATING CHECK ......................................... 21 .
TROUBLESHOOTING ............................................... 5 . AIRTIGHT CHECK ............................................. 21 .
NVH Troubleshooting Chart .................................... 5 . Removal and Installation ....................................... 21 .
BRAKE PEDAL ......................................................... 6. REMOVAL .......................................................... 21
. I
Inspection and Adjustment ...................................... 6 . INSPECTION AFTER REMOVAL ...................... 21 .
PLAY AND CLEARANCE BETWEEN BRAKE INSTALLATION .................................................. 22 .
PEDAL AND FLOOR PANEL WITH PEDAL FRONT DISC BRAKE .............................................. 23 . J
DEPRESSED ....................................................... 6 . Components .......................................................... 23
.
ADJUSTMENT ..................................................... 7 . Inspection .............................................................. 24
.
Removal and Installation ......................................... 7 . PAD WEAR INSPECTION .................................. 24 .
K
COMPONENT PARTS DRAWING ....................... 7 . Pad Replacement .................................................. 24 .
REMOVAL ............................................................ 8
. REMOVAL .......................................................... 24
.
INSPECTION AFTER REMOVAL ........................ 8 . INSTALLATION .................................................. 25 .
INSTALLATION .................................................... 8 . Caliper Removal and Installation ........................... 26 . L
BRAKE FLUID ........................................................... 9
. REMOVAL .......................................................... 26
.
Checking Brake Fluid Level .................................... 9 . INSTALLATION .................................................. 26 .
Checking Brake Line ............................................... 9 . Caliper Disassembly and Assembly ...................... 26 . M
Drain and Refill ........................................................ 9
. DISASSEMBLY .................................................. 26 .
Bleeding Brake System ......................................... 10 . CALIPER INSPECTION ..................................... 27 .
BRAKE PIPING AND HOSE ....................................11 . DISC ROTOR INSPECTION .............................. 27 .
Hydraulic Circuit .....................................................11
. ASSEMBLY ........................................................ 28.
Front Brake Piping and Hose .................................11 . Brake Burnishing Procedure .................................. 29 .
REMOVAL ...........................................................11
. REAR DISC BRAKE ................................................ 30 .
INSTALLATION ...................................................11 . Component ............................................................ 30
.
Rear Brake Piping and Hose ................................. 12 . Inspection .............................................................. 31
.
REMOVAL .......................................................... 12
. PAD THICKNESS ............................................... 31 .
INSTALLATION .................................................. 12 . Pad Replacement .................................................. 31 .
Inspection .............................................................. 12
. REMOVAL .......................................................... 31
.
BRAKE MASTER CYLINDER ................................. 13 . INSTALLATION .................................................. 32 .
Components .......................................................... 13
. Caliper Removal and Installation ........................... 32 .
Removal and Installation ....................................... 13 . REMOVAL .......................................................... 32
.
REMOVAL .......................................................... 13
.
Revision; 2004 April BR-1 2003 Q45
INSTALLATION ................................................... 32
. General Specifications ...........................................36.
Caliper Disassembly and Assembly ...................... 33 . Brake Pedal ...........................................................36
.
DISASSEMBLY .................................................. 33
. Check Valve ...........................................................36
.
INSPECTION AFTER DISASSEMBLY ............... 33 . Brake Booster ........................................................36
.
DISC ROTOR INSPECTION .............................. 34 . Front Disc Brake ....................................................36
.
ASSEMBLY ........................................................ 34
. Rear Disc Brake .....................................................36
.
SERVICE DATA AND SPECIFICATIONS (SDS) ..... 36 .
Revision; 2004 April BR-2 2003 Q45
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EFS00281
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. BR
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 EFS000NL
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.
q To clean or wash all parts of master cylinder, disc brake caliper and wheel cylinder, use clean brake fluid. I
q Never use mineral oils such as gasoline or kerosene. They will ruin rubber parts of hydraulic system.
q Use flare nut wrench when removing and installing brake tube.
q Always torque brake lines when installing. J
q Before working, turn ignition switch OFF and disconnect con-
nectors for VDC actuator or battery terminals.
q Burnish brake contact surfaces after refinishing or replacing K
drums or rotors, after replacing pads or linings, or if a soft pedal
occurs at very low mileage.
Refer to BR-29, "Brake Burnishing Procedure" . L
SBR686C
M
WARNING:
q Clean brake pads and shoes with a waste cloth, then wipe with a dust collector.
Revision; 2004 April BR-3 2003 Q45
PREPARATION
PREPARATION PFP:00002
Commercial Service Tools EFS000NK
Tool name Description
1.Flare nut crowfoot
Removing and installing each brake
a: 10 mm (0.39 in)
piping
2.Torque wrench
S-NT360
Removing front and rear caliper
Power tool
assembly
PBIC0190E
Revision; 2004 April BR-4 2003 Q45
Symptom
X: Applicable
Reference page
BRAKE
Possible cause and
SUSPECTED PARTS
Revision; 2004 April
Noise
Shake
Shimmy, Judder
NVH Troubleshooting Chart
Pads - damaged BR-24,BR-31
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