Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti Q45 FY33 F50 2001-2006 Approved 2005_Q45 br

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BRAKE SYSTEM

F BRAKES

SECTION
BRAKE SYSTEM
BR B

E
CONTENTS
PRECAUTIONS ......................................................... 3 . REMOVAL .......................................................... 13
. BR
Precautions for Supplemental Restraint System INSTALLATION .................................................. 13 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Disassembly and Assembly ................................... 14 .
SIONER" ................................................................. 3
. COMPONENTS .................................................. 14 . G
Precautions for Brake System ................................. 3 . DISASSEMBLY .................................................. 14 .
PREPARATION .......................................................... 4 . INSPECTION AFTER DISASSEMBLY ............... 16 .
Commercial Service Tools ....................................... 4 . ASSEMBLY ........................................................ 16.
H
NOISE, VIBRATION AND HARSHNESS (NVH) BRAKE BOOSTER .................................................. 20 .
TROUBLESHOOTING ............................................... 5 . On-Vehicle Service ................................................ 20.
NVH Troubleshooting Chart .................................... 5 . OPERATING CHECK ......................................... 20 .
BRAKE PEDAL ......................................................... 6 . AIRTIGHT CHECK ............................................. 20 . I
Inspection and Adjustment ...................................... 6 . Removal and Installation ....................................... 20 .
PLAY AND CLEARANCE BETWEEN BRAKE COMPONENTS .................................................. 20 .
PEDAL AND FLOOR PANEL WITH PEDAL REMOVAL .......................................................... 20
. J
DEPRESSED ....................................................... 6 . INSPECTION AFTER REMOVAL ...................... 21 .
ADJUSTMENT ..................................................... 7 . INSTALLATION .................................................. 21 .
Removal and Installation ......................................... 7 . VACUUM LINES ...................................................... 22 .
K
COMPONENTS ................................................... 7 . Components .......................................................... 22
.
REMOVAL ............................................................ 8. Removal and Installation ....................................... 22 .
INSPECTION AFTER REMOVAL ........................ 8 . Inspection .............................................................. 22
.
INSTALLATION .................................................... 8 . VISUAL INSPECTION ........................................ 22 . L
BRAKE FLUID ........................................................... 9. CHECK VALVE INSPECTION ............................ 22 .
Checking Brake Fluid Level .................................... 9 . FRONT DISC BRAKE .............................................. 23 .
Drain and Refill ........................................................ 9
. On-Vehicle Inspection ............................................ 23 . M
Bleeding Brake System ........................................... 9 . PAD WEAR INSPECTION .................................. 23 .
BRAKE PIPING AND HOSE ................................... 10 . Components .......................................................... 23
.
Hydraulic Circuit .................................................... 10
. Removal and Installation of Brake Pad ................. 24 .
Removal and Installation of Front Brake Piping and REMOVAL .......................................................... 24
.
Hose .......................................................................11
. INSTALLATION .................................................. 25 .
REMOVAL ...........................................................11 . Removal and Installation of Brake Caliper Assembly
INSTALLATION ...................................................11 . ... 25
Removal and Installation of Rear Brake Piping and REMOVAL .......................................................... 25
.
Hose .......................................................................11
. INSTALLATION .................................................. 25 .
REMOVAL ...........................................................11 . Disassembly and Assembly of Brake Caliper
INSTALLATION .................................................. 12 . Assembly ............................................................... 26
.
Inspection After Installation ................................... 12 . DISASSEMBLY .................................................. 26 .
BRAKE MASTER CYLINDER ................................. 13 . INSPECTION AFTER DISASSEMBLY ............... 26 .
On-board Inspection .............................................. 13 . DISC ROTOR INSPECTION .............................. 27 .
LEAK INSPECTION ........................................... 13 . ASSEMBLY ........................................................ 27.
Removal and Installation ....................................... 13 . Brake Burnishing Procedure .................................. 28 .

Edition; 2004 May BR-1 2005 Q45
REAR DISC BRAKE ................................................ 30 . DISASSEMBLY ...................................................32 .
On-Vehicle Inspection ............................................ 30. INSPECTION AFTER DISASSEMBLY ...............33 .
PAD WEAR INSPECTION .................................. 30 . DISC ROTOR INSPECTION ..............................33 .
Components .......................................................... 30
. ASSEMBLY .........................................................34
.
Removal and Installation of Brake Pad .................. 31 . Brake Burnishing Procedure ..................................35 .
REMOVAL .......................................................... 31
. SERVICE DATA AND SPECIFICATIONS (SDS) .....36 .
INSTALLATION ................................................... 31. General Specifications ...........................................36.
Removal and Installation of Brake Caliper Assembly Brake Pedal ...........................................................36
.
... 32 Check Valve ...........................................................36
.
REMOVAL .......................................................... 32
. Brake Booster ........................................................36
.
INSTALLATION ................................................... 32. Front Disc Brake ....................................................36
.
Disassembly and Assembly of Brake Caliper Rear Disc Brake .....................................................36
.
Assembly ............................................................... 32
.

Edition; 2004 May BR-2 2005 Q45
PRECAUTIONS

PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EFS004YY

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 Clean dust on front brake and rear brake with a vacuum dust collector. Do not blow with compressed air.
H
q Recommended fluid is brake fluid "DOT 3".
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 on painted I
areas, wipe it off and wash it away with water immediately.
q Use clean brake fluid to clean or wash all parts of master cylinder, disc brake caliper, etc.
q Do not use mineral oils such as gasoline or kerosene. They will ruin rubber parts of hydraulic system. J
q Use a flare nut torque wrench when removing and installing
brake tube.
q When installing brake piping, be sure to check torque. K
q Before working, turn ignition switch OFF and disconnect con-
nector for VDC/TCS/ABS control unit or battery negative termi-
nal. L
q Burnish brake pad (or lining) contact surfaces of disc rotor after
refinishing or replacing drums or rotors, after replacing pads or
linings, or if a soft pedal occurs at very low mileage.
Refer to BR-28, "Brake Burnishing Procedure" (Front disc M
brake). Refer to BR-35, "Brake Burnishing Procedure" (Rear SBR686C

disc brake).

WARNING:
q Clean brake pads and shoes with a waste cloth, then wipe them with a vacuum dust collector.

Edition; 2004 May BR-3 2005 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) / 12 mm (0.47 in)
piping
2.Torque wrench

S-NT360

Pin punch Removing and installing reservoir tank
Tip diameter: 4 mm(0.16 in)dia. pin

ZZA0515D

Removing front and rear caliper
Power tool
assembly, tires

PBIC0190E

Edition; 2004 May BR-4 2005 Q45
Symptom

X: Applicable
Reference page

BRAKE
Possible cause and

Edition; 2004 May
SUSPECTED PARTS

Noise
Shake

Shimmy, Judder
NVH Troubleshooting Chart

Pads - damaged BR-23,BR-30

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