brake INFINITI QX56 2010 Factory Owner's Guide

BCS-24
< FUNCTION DIAGNOSIS >[BCM]
DIAGNOSIS SYSTEM (BCM)
ACTIVE TEST
FLASHER
FLASHER : CONSULT-III Function (BCM - FLASHER)INFOID:0000000005146403
DATA MONITOR
ACTIVE TEST
AIR CONDITIONER
AIR CONDITIONER : CONSULT-III Function (BCM - AIR CONDITIONER)INFOID:0000000005146404
DATA MONITOR
RR WIPER ON [ON/OFF]
Each switch status that BCM judges from the combination switch reading function
RR WIPER INT [ON/OFF]
RR WASHER SW [ON/OFF]
RR WIPER STOP [ON/OFF] Rear wiper motor (stop position) status input from the rear wiper motor Monitor Item
[Unit] Description
Test Item Operation
Description
FR WIPER HI
Transmits the front wiper request signal (HI) to IPDM E/R with CAN communication to op-
erate the front wiper HI operation.
LO Transmits the front wiper request signal (LO) to IPDM E/R with CAN communication to
operate the front wiper LO operation.
INT Transmits the front wiper request signal (INT) to IPDM E/R with CAN communication to
operate the front wiper INT operation.
OFF Stops transmitting the front wiper request signal to stop the front wiper operation.
RISE UP WIPER
TEST ON Outputs the voltage to operate the rear wiper motor.
OFF Stops the voltage to stop.
Monitor Item [Unit] Description
IGN ON SW [ON/OFF] Ignition switch (ON) status judged from IGN signal (ignition power supply)
HAZARD SW [ON/OFF] The switch status input from the hazard switch
TURN SIGNAL R [ON/OFF] Each switch condition that BCM judges from the combination switch reading function
TURN SIGNAL L [ON/OFF]
BRAKE SW [ON/OFF] The switch status input from the brake switch
Test ItemOperation Description
FLASHER RH Outputs the voltage to turn the right side turn signal lamps ON.
LH Outputs the voltage to turn the left side turn signal lamps ON.
OFF Stops the voltage to turn the turn signal lamps OFF.
Monitor Item [Unit] Contents
IGN ON SW [ON/OFF] Display [ignition switch position (On)/(Off), ACC position (Off)] status as judged from ignition
switch signal
FAN ON SIG [ON/OFF] Display [FAN (On)/FAN (Off)] st atus as judged form blower fan motor switch signal
AIR COND SW [ON/OFF] Display [COMP (On)/COMP (Off)] status as judged form air conditioner switch signal
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BR-1
BRAKES
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SECTION BR
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CONTENTS
BRAKE SYSTEM
PRECAUTION ....... ........................................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
3
Precaution for Brake System ....................................4
PREPARATION ............................................5
PREPARATION .............................................. .....5
Special Service Tool ........................................... ......5
Commercial Service Tool ..........................................5
FUNCTION DIAGNOSIS ...............................6
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ........................ .....
6
NVH Troubleshooting Chart ................................ ......6
BASIC INSPECTION ....................................7
FRONT DISC B RAKE .................................... .....7
BRAKE PAD .......................................................... ......7
BRAKE PAD : Front Pad Inspection .........................7
DISC ROTOR ......................................................... ......7
DISC ROTOR : Front Rotor Inspection .....................7
REAR DISC BRAKE ...................................... .....9
BRAKE PAD .......................................................... ......9
BRAKE PAD : Rear Pad Inspection ..........................9
DISC ROTOR ......................................................... ......9
DISC ROTOR : Rear Rotor Inspection ......................9
BRAKE BOOSTER ........................................ ....10
Inspection ............................................................ ....10
VACUUM LINES ............................................. ....11
Inspection ............................................................ ....11
BRAKE MASTER CYLINDER ..........................12
On Board Inspection ................................................12
BRAKE TUBE AND HOSE ...............................13
Hydraulic Circuit ......................................................13
FRONT BRAKE ..................................................... ....13
FRONT BRAKE : Inspection ......................... ...........13
REAR BRAKE ........................................................ ....14
REAR BRAKE : Inspection ........................ ..............14
ON-VEHICLE MAINTEN ANCE ....................15
BRAKE PEDAL .................................................15
Inspection and Adjustment .................................. ....15
BRAKE FLUID ..................................................17
On Board Inspection ............................................ ....17
Drain and Refill ........................................................17
Bleeding Brake System ...........................................17
ON-VEHICLE REPAIR .................................19
BRAKE PEDAL .................................................19
Removal and Installation ..................................... ....19
BRAKE TUBE AND HOSE ...............................21
Hydraulic Circuit ......................................................21
Removal and Installation of Front Brake Piping
and Brake Hose .......................................................
21
Removal and Installation of Rear Brake Piping
and Brake Hose .......................................................
22
Inspection After Installation .....................................23
BRAKE MASTER CYLINDER ..........................25
Removal and Installation .........................................25
BRAKE BOOSTER ...........................................26
Removal and Installation ..................................... ....26
VACUUM LINES ...............................................28
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BR-2
Removal and Installation ........................................28
FRONT DISC BRAKE ........................................29
Exploded View of Brake Pads ............................. ...29
Removal and Installation of Brake Pads .................29
Brake Burnishing Procedure ...................................30
Exploded View of Brake Caliper .............................31
Removal and Installation of Brake Caliper and Ro-
tor ...........................................................................
31
REAR DISC BRAKE ..........................................34
Exploded View of Brake Pads ............................. ...34
Removal and Installation of Brake Pad ..................34
Brake Burnishing Procedure ...................................35
Exploded View of Brake Caliper .............................35
Removal and Installation of Brake Caliper and
Disc Rotor ............................................................ ...
36
DISASSEMBLY AND ASSEMBLY .............37
BRAKE MASTER CYLINDER ........................ ...37
Disassembly and Assembly ................................. ...37
FRONT DISC BRAKE .......................................39
Disassembly and Assembly ................................. ...39
REAR DISC BRAKE ....................................... ...42
Disassembly and Assembly ................................. ...42
SERVICE DATA AND SPECIFICATIONS
(SDS) .......... ................................. ...............
45
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ...
45
General Specification ........................................... ...45
Brake Pedal ............................................................45
Brake Booster .........................................................46
Check Valve ............................................................46
Front Disc Brake .....................................................46
Rear Disc Brake ......................................................46
Revision: April 20092010 QX56

BR-4
< PRECAUTION >
PRECAUTIONS
5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of a ll control units using CONSULT-III.
Precaution for Brake SystemINFOID:0000000005147886
• Always use recommended brake fluid. Refer to MA-13, "Fluids and Lubricants".
• Do not reuse drained brake fluid.
• Be careful not to splash brake fluid on painted areas.
• To clean or wash all parts of master cylinder, disc brake caliper and wheel cylinder, use clean brake fluid.
• Do not use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system.
• Use flare nut wrench when removing and installing brake tube.
• Always check tightening torque when installing brake lines.
• Before working, turn ignition switch to OFF and disconnect con- nectors for ABS actuator and electric unit (control unit) or battery
terminals.
• Burnish the brake contact surfaces 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-30, "
Brake Burnishing
Procedure".
WARNING:
• Clean brake pads and shoes wi th a waste cloth, then wipe
with a dust collector.
SBR686C
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PREPARATIONBR-5
< PREPARATION >
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PREPARATION
PREPARATION
Special Service ToolINFOID:0000000005147887
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolINFOID:0000000005147888
Tool number
(Kent-Moore No.)
Tool name Description
—
(J-46532)
Brake and clutch pedal height measure-
ment tool Measuring brake pedal height
38-PFM90.5
(—)
Pro-Cut PFM90 On-Car Brake Lathe Turning rotors
LFIA0227E
ALFIA0092ZZ
Tool name
Description
1. Flare nut crowfoot
2. Torque wrench Removing and installing each brake pip-
ing.
a: 10 mm (0.39 in) / 12 mm (0.47 in)
Power tool Removing nuts, bolts and screws.
S-NT360
PIIB1407E
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FRONT DISC BRAKEBR-7
< BASIC INSPECTION >
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BASIC INSPECTION
FRONT DISC BRAKE
BRAKE PAD
BRAKE PAD : Front Pad InspectionINFOID:0000000005147890
PA D W E A R
Check pad thickness from the inspection holes on cylinder body.
Check using a scale if necessary.
DISC ROTOR
DISC ROTOR : Front Rotor InspectionINFOID:0000000005147891
VISUAL
Check surface of disc rotor for uneven wear, cracks, and serious damage. Replace as necessary.
RUNOUT
1. Attach disc rotor to wheel hub using wheel nuts (at two or more positions).
2. Inspect runout using a dial gauge placed at 10 mm (0.39 in) inside the disc edge.
NOTE:
Before measuring, make sure that wheel bearing axial end play
is within the specification. Refer to RAX-6, "
On-Vehicle Inspec-
tion and Service".
3. When runout exceeds limit value, displace mounting positions of disc rotor by one hole. And then find a position of the minimum value for runout.
4. If runout is outside the specified value after performing the above operation, turn disc rotor using Tool.
THICKNESS
Standard thickness : Refer to BR-46, "Front Disc
Brake".
Repair limit thickness : Refer to BR-46, "
Front Disc
Brake".
WFIA0522E
Runout limit : Refer to BR-46, "Front Disc
Brake".
(with it attached to the vehicle)
Tool number : 38-PFM90.5 ( — )
BRA0580D
Revision: April 20092010 QX56

BR-8
< BASIC INSPECTION >
FRONT DISC BRAKE
Check thickness of the disc rotor using a micrometer. Replace disc
rotor if thickness is less than the wear limit.Standard thickness : Refer to BR-46, "
Front
Disc Brake".
Repair limit thickness : Refer to BR-46, "
Front
Disc Brake".
Thickness variation
(Measured at 8 positions) : Refer to
BR-46, "
Front
Disc Brake".
SBR020B
Revision: April 20092010 QX56

REAR DISC BRAKEBR-9
< BASIC INSPECTION >
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REAR DISC BRAKE
BRAKE PAD
BRAKE PAD : Rear Pad InspectionINFOID:0000000005147892
PA D W E A R
Check pad thickness from the inspection holes on cylinder body.
Check using a scale if necessary.
DISC ROTOR
DISC ROTOR : Rear Rotor InspectionINFOID:0000000005147893
VISUAL
Check surface of disc rotor for uneven wear, cracks, and serious damage. Replace as necessary.
RUNOUT
1. Attach disc rotor to wheel hub using wheel nuts (at two or more positions).
2. Inspect runout using dial gauge placed at 10 mm (0.39 in) inside disc edge.
NOTE:
Before measuring, make sure that wheel bearing axial end play
is within the specification. Refer to RAX-6, "
On-Vehicle Inspec-
tion and Service".
3. When runout exceeds limit value, displace mounting positions of disc rotor by one hole. And then find a position of the minimum value for runout.
4. If runout is outside the specified value after performing the above operation, turn disc rotor using Tool.
THICKNESS
Check the thickness of the disc rotor using a micrometer. Replace
disc rotor if the thickness is less than the wear limit. Standard thickness : Refer to
BR-46, "
Rear Disc
Brake".
Repair limit thickness : Refer to BR-46, "
Rear Disc
Brake".
BRA0010D
Runout limit : Refer to BR-46, "Rear Disc Brake".
(With it attached to the vehicle)
Tool number : 38-PFM90.5 ( — )
BRA0697D
Standard thickness : Refer to BR-46, "Rear
Disc Brake".
Repair limit thickness : Refer to BR-46, "
Rear
Disc Brake".
Thickness variation
(Measured at 8 positions) : Refer to
BR-46, "
Rear
Disc Brake".
SFIA2284E
Revision: April 20092010 QX56

BR-10
< BASIC INSPECTION >
BRAKE BOOSTER
BRAKE BOOSTER
InspectionINFOID:0000000005147894
OPERATION
With engine stopped, change vacuum to atmospheric pressure by
depressing brake pedal several times. Then with brake pedal fully
depressed, start engine and when vacuum pressure reaches the
standard, make sure that clearance between brake pedal and floor
panel decreases.
AIR TIGHT
• Run engine at idle for approximately 1 minute, and stop it afterapplying vacuum to booster. Depress brake pedal normally to
change vacuum to atmospheric pressure. Make sure that distance
at intervals of 5 seconds between brake pedal and floor panel
gradually increases.
• Depress brake pedal while engine is running, and stop engine with pedal depressed. The pedal stroke should not change after holding pedal down for 30 seconds.
BRA0037D
SBR365AA
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VACUUM LINESBR-11
< BASIC INSPECTION >
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VACUUM LINES
InspectionINFOID:0000000005147895
VISUAL INSPECTION
Check for improper assembly, damage and de terioration. Replace as necessary.
CHECK VALVE INSPECTION
Airtightness Inspection
Use a suitable tool to check. Connect to brake booster side of check
valve.
Check valve specification : Refer to BR-46, "
Check
Va l v e".
LFIA0217E
Revision: April 20092010 QX56