brake rotor INFINITI QX56 2011 Factory Owner's Guide

COMPONENT PARTSBRC-15
< SYSTEM DESCRIPTION > [WITH VDC]
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 Downsize and weight reduction is aimed. IC for detection portion and magnet for sensor rotor are adopted.
 Power supply is supplied to detection portion so that magnetic field
line is read. Magnetic field that is detected is converted to current
signal.
 When sensor rotor rotates, magnetic field changes. Magnetic field
change is converted to current signals (rectangular wave) and is
transmitted to ABS actuator and electric unit (control unit). Change
of magnetic field is pr oportional to wheel speed.
Stop Lamp SwitchINFOID:0000000006222563
Detects the operation status of brake pedal and transmits converted electric signal to ABS actuator and elec-
tric unit (control unit).
Steering Angle SensorINFOID:0000000006222564
Detects the following information and transmits steering angle signal to ABS actuator and electric unit (control
unit) via CAN communication.
 Steering wheel rotation amount
 Steering wheel rotation angular velocity
 Steering wheel rotation direction
Yaw Rate/Side/Decel G sensorINFOID:0000000006222565
Calculates the following information that affects the v ehicle and transmits a signal to ABS actuator and electric
unit (control unit) via communication lines.
 Vehicle rotation angular velocity (yaw rate signal)
 Vehicle lateral acceleration (side G signal) / longitudinal acceleration (decel G signal)
Brake Fluid Level SwitchINFOID:0000000006222566
Detects the brake fluid level in reservoir tank and trans mits converted electric signal from ABS actuator and
electric unit (control unit), when brake fluid level is the specified level or less.
Parking Brake SwitchINFOID:0000000006222567
Detects the operation status of parking brake switch and transmits converted electric signal from combination
meter to ABS actuator and electric unit (control unit).
VDC OFF SwitchINFOID:0000000006222568
 VDC OFF switch is integrated in SNOW MODE / TOW MODE / VDC OFF switch assembly (2WD models) or
4WD switch assembly (4WD models).
 The operation of the VDC OFF switch enables the arbi trary switching of the VDC function between stop sta-
tus and standby status. The status of the function is indicated by the VDC OFF indicator lamp. (ON: Non-
operational status, OFF: Standby status)
- VDC function NOTE:
Brake limited slip differentia l (BLSD) control operates.
- TCS function
 VDC OFF indicator lamp turns OFF (standby status) when the engine is started again after it is stopped once while VDC OFF indicator lamp is ON (non-operational status).
JPFIC0131GB
Revision: 2010 May2011 QX56

BRC-26
< SYSTEM DESCRIPTION >[WITH VDC]
SYSTEM
ABS FUNCTION
ABS warning lamp and VDC warning lamp in combinati
on meter turn ON when a malfunction occurs in system
[ABS actuator and electric unit (control unit)]. The c ontrol is suspended for VDC function, TCS function, ABS
function, hill start assist function and brake limited sl ip differential (BLSD) function. The vehicle status
becomes the same as models without VDC function, TCS f unction, ABS function, hill start assist function and
brake limited slip differential (BLSD) function. However, EBD function is operated normally.
NOTE:
ABS self-diagnosis sound may be heard the same as in the normal condition, because self-diagnosis is per-
formed when ignition switch turns ON and when vehicle initially starts.
EBD FUNCTION
ABS warning lamp, brake warning lamp and VDC warning lamp in combination meter turn ON when a mal-
function occurs in system [ABS actuator and electric unit (control unit)]. The control is suspended for VDC
function, TCS function, ABS function, EBD function, hill start assist function and brake limited slip differential
(BLSD) function. The vehicle status becomes the sa me as models without VDC function, TCS function, ABS
function, EBD function, hill star t assist function and brake limited slip differential (BLSD) function.
DTC Malfunction detected condition Fail-safe condition
C1101 When an open circuit is detected in rear RH wheel sensor circuit.
The following functions are sus-
pended.
 VDC function
 TCS function
 ABS function
 EBD function (only when both 2 rear wheels are malfunctioning)
 hill start assist function
 Brake limited slip differential
(BLSD) function
C1102 When an open circuit is detected in rear LH wheel sensor circuit.
C1103 When an open circuit is detected in front RH wheel sensor circuit.
C1104 When an open circuit is detected in front LH wheel sensor circuit.
C1105
 When power supply voltage of rear RH wheel sensor is low.
 When distance between rear RH wheel sensor and rear RH wheel sensor rotor is
large.
 When installation of rear RH wheel sensor or rear RH wheel sensor rotor is not
normal.
C1106  When power supply voltage of rear LH wheel sensor is low.
 When distance between rear LH wheel sensor and rear LH wheel sensor rotor is
large.
 When installation of rear LH wheel sensor or rear LH wheel sensor rotor is not nor- mal.
C1107  When power supply voltage of front RH wheel sensor is low.
 When distance between front RH wheel sensor and front RH wheel sensor rotor
is large.
 When installation of front RH wheel sensor or front RH wheel sensor rotor is not normal.
C1108  When power supply voltage of front LH wheel sensor is low.
 When distance between front LH wheel sensor and front LH wheel sensor rotor is
large.
 When installation of front LH wheel sensor or front LH wheel sensor rotor is not normal.
C1109  When ignition voltage is 10 V or less.
 When ignition voltage is 16 V or more. The following functions are sus-
pended.
 VDC function
 TCS function
 ABS function
 EBD function
 hill start assist function
 Brake limited slip differential
(BLSD) function
C 1111
 When a malfunction is detected in motor or motor relay.
 When a low pressure malfunction is detected in accumulator.
 When a malfunction is detected in accumulator pressure sensor.
C 111 5 When difference in wheel speed between any wheel and others is detected during
the vehicle is driven, because of installation of other tires than specified. The following functions are sus-
pended.
 VDC function
 TCS function
 ABS function
 hill start assist function
 Brake limited slip differential
(BLSD) function
C 111 6
 When stop lamp switch signal is not input when brake pedal depress.
 When stop lamp switch signal is not input when stop lamp relay operates.
C 111 8
*1When a malfunction is detected in transfer control unit system.
Revision: 2010 May2011 QX56

BRC-48
< ECU DIAGNOSIS INFORMATION >[WITH VDC]
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
VDC function, TCS function, hill start assist function and
brake limited slip differential (BLSD) function. How-
ever, ABS function and EBD function are operated normally.
ABS FUNCTION
ABS warning lamp and VDC warning lamp in combinati on meter turn ON when a malfunction occurs in system
[ABS actuator and electric unit (control unit)]. The c ontrol is suspended for VDC function, TCS function, ABS
function, hill start assist function and brake limited sl ip differential (BLSD) function. The vehicle status
becomes the same as models without VDC function, TCS f unction, ABS function, hill start assist function and
brake limited slip differential (BLSD) function. However, EBD function is operated normally.
NOTE:
ABS self-diagnosis sound may be heard the same as in the normal condition, because self-diagnosis is per-
formed when ignition switch turns ON and when vehicle initially starts.
EBD FUNCTION
ABS warning lamp, brake warning lamp and VDC warning lamp in combination meter turn ON when a mal-
function occurs in system [ABS actuator and electric unit (control unit)]. The control is suspended for VDC
function, TCS function, ABS function, EBD function, hill start assist function and brake limited slip differential
(BLSD) function. The vehicle status becomes the sa me as models without VDC function, TCS function, ABS
function, EBD function, hill star t assist function and brake limited slip differential (BLSD) function.
DTC Malfunction detected condition Fail-safe condition
C1101 When an open circuit is detected in rear RH wheel sensor circuit.
The following functions are sus-
pended.
 VDC function
 TCS function
 ABS function
 EBD function (only when both 2 rear wheels are malfunctioning)
 hill start assist function
 Brake limited slip differential (BLSD) function
C1102 When an open circuit is detected in rear LH wheel sensor circuit.
C1103 When an open circuit is detected in front RH wheel sensor circuit.
C1104 When an open circuit is detected in front LH wheel sensor circuit.
C1105
 When power supply voltage of rear RH wheel sensor is low.
 When distance between rear RH wheel sensor and rear RH wheel sensor rotor is
large.
 When installation of rear RH wheel sensor or rear RH wheel sensor rotor is not normal.
C1106  When power supply voltage of rear LH wheel sensor is low.
 When distance between rear LH wheel sensor and rear LH wheel sensor rotor is
large.
 When installation of rear LH wheel sensor or rear LH wheel sensor rotor is not nor-
mal.
C1107  When power supply voltage of front RH wheel sensor is low.
 When distance between front RH wheel sensor and front RH wheel sensor rotor
is large.
 When installation of front RH wheel sensor or front RH wheel sensor rotor is not normal.
C1108  When power supply voltage of front LH wheel sensor is low.
 When distance between front LH wheel sensor and front LH wheel sensor rotor is
large.
 When installation of front LH wheel sensor or front LH wheel sensor rotor is not normal.
C1109  When ignition voltage is 10 V or less.
 When ignition voltage is 16 V or more. The following functions are sus-
pended.
 VDC function
 TCS function
 ABS function
 EBD function
 hill start assist function
 Brake limited slip differential
(BLSD) function
C 1111
 When a malfunction is detected in motor or motor relay.
 When a low pressure malfunction is detected in accumulator.
 When a malfunction is detected in accumulator pressure sensor.
Revision: 2010 May2011 QX56

BRC-128
< SYMPTOM DIAGNOSIS >[WITH VDC]
UNEXPECTED BRAKE PEDAL REACTION
UNEXPECTED BRAKE PEDAL REACTION
DescriptionINFOID:0000000006222659
A malfunction of brake pedal feel (height or ot
hers) is detected when brake pedal is depressed.
Diagnosis ProcedureINFOID:0000000006222660
1.CHECK FRONT AND REAR AXLE
Check that there is no excessive looseness in front and rear axle.
 Front axle: Refer to FAX-7, "
Inspection" (2WD), FAX-16, "Inspection" (4WD).
 Rear axle: Refer to RAX-5, "
Inspection"
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace error-detected parts.
2.CHECK DISC ROTOR
Check disc rotor runout.
 Front: Refer to BR-16, "
DISC ROTOR : Inspection and Adjustment".
 Rear: Refer to BR-18, "
DISC ROTOR : Inspection and Adjustment".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Refinish or replace disc rotor.  Front: Refer to BR-16, "
DISC ROTOR : Inspection and Adjustment".
 Rear: Refer to BR-18, "
DISC ROTOR : Inspection and Adjustment".
3.CHECK BRAKE FLUID LEACKAGE
Check fluid leakage.
 Front: Refer to BR-24, "
FRONT : Inspection".
 Rear: Refer to BR-26, "
REAR : Inspection".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK BRAKE PEDAL
Check each item of brake pedal. Refer to BR-7, "
Inspection and Adjustment".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Adjust each item of brake pedal. Refer to BR-7, "
Inspection and Adjustment".
5.CHECK BRAKING FORCE
Check brake force using a brake tester.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Check each components of brake system.
6.CHECK BRAKE PERFORMANCE
Disconnect ABS actuator and electric unit (control unit) connector so that ABS does not operate. Check that
brake force is normal in this condition. Connect harness connectors after checking.
Is the inspection result normal?
YES >> Normal
NO >> Check each components of brake system.
Revision: 2010 May2011 QX56

FAX-8
< REMOVAL AND INSTALLATION >[2WD]
FRONT WHEEL HUB AND KNUCKLE
REMOVAL AND INSTALLATION
FRONT WHEEL HUB AND KNUCKLE
Exploded ViewINFOID:0000000006225418
Removal and InstallationINFOID:0000000006225419
REMOVAL
1. Remove tires with power tool. Refer to
WT-64, "Removal and Installation".
2. Remove brake hose bracket. Refer to BR-23, "
FRONT : Removal and Installation".
3. Remove caliper assembly mounting bolts. Hang caliper assembly in a place where it will not interfere with work. Refer to BR-37, "
BRAKE CALIPER ASSEMBLY : Removal and Installation".
CAUTION:
Never depress brake pedal while brake caliper is removed.
4. Remove disc rotor. CAUTION:
 Put matching marks on the wh eel hub and bearing assembly and the disc rotor before removing
the disc rotor.
 Never drop disc rotor.
5. Remove wheel sensor harness. Refer to BRC-134, "
FRONT WHEEL SENSOR : Removal and Installa-
tion".
CAUTION:
Never pull on wheel sensor harness.
6. Remove steering outer socket. Refer to ST-42, "
Removal and Installation".
7. Set suitable jack under lower link.
1. Steering knuckle 2. Cotter pin 3. Splash guard
4. Hub bolt 5. Wheel hub and bearing assembly 6. Disc rotor
Refer to GI-4, "
Components" for symbols in the figure.
JPDIF0294GB
Revision: 2010 May2011 QX56

FAX-18
< REMOVAL AND INSTALLATION >[4WD]
FRONT WHEEL HUB AND KNUCKLE
REMOVAL AND INSTALLATION
FRONT WHEEL HUB AND KNUCKLE
Exploded ViewINFOID:0000000006225396
Removal and InstallationINFOID:0000000006225397
REMOVAL
1. Remove tires.
2. Remove brake hose bracket. Refer to
BR-23, "
FRONT : Removal and Installation".
3. Remove caliper assembly mounting bolts. Hang caliper assembly in a place where it will not interfere with work. Refer to BR-37, "
BRAKE CALIPER ASSEMBLY : Removal and Installation".
CAUTION:
Never depress brake pedal while brake caliper is removed.
4. Remove disc rotor. CAUTION:
 Put matching marks on the wh eel hub and bearing assembly and the disc rotor before removing
the disc rotor.
 Never drop disc rotor.
5. Remove wheel sensor harness. Refer to BRC-134, "
FRONT WHEEL SENSOR : Removal and Installa-
tion".
CAUTION:
Never pull on wheel sensor harness.
6. Remove steering outer socket. Refer to ST-42, "
Removal and Installation".
1. Steering knuckle 2. Cotter pin 3. Splash guard
4. Hub bolt 5. Wheel hub and bearing assembly 6. Disc rotor
7. Wheel hub lock nut
A. Tightening must be done following the installation procedure. Refer to FA X - 1 8 , "
Removal and Installation".
Refer to GI-4, "
Components" for symbols in the figure.
JPDIF0298GB
Revision: 2010 May2011 QX56

FAX-22
< REMOVAL AND INSTALLATION >[4WD]
FRONT DRIVE SHAFT
FRONT DRIVE SHAFT
Exploded ViewINFOID:0000000006225402
Removal and InstallationINFOID:0000000006225403
REMOVAL
1. Remove tires.
2. Remove brake hose bracket. Refer to
BR-23, "
FRONT : Removal and Installation".
3. Remove caliper assembly mounting bolts. Hang caliper assembly in a place where it will not interfere with work. Refer to BR-37, "
BRAKE CALIPER ASSEMBLY : Removal and Installation".
CAUTION:
Never depress brake pedal while brake caliper is removed.
4. Remove disc rotor. Refer to FAX-18, "
Removal and Installation".
5. Remove wheel sensor harness. Refer to BRC-134, "
FRONT WHEEL SENSOR : Removal and Installa-
tion".
CAUTION:
Never pull on wheel sensor harness.
6. Remove height sensor from upper link (right side). Refer to EXL-136, "
Removal and Installation".
7. Remove steering outer socket. Refer to ST-42, "
Removal and Installation".
8. Set suitable jack under lower link.
9. Remove shock absorber mounting bolt from lower link. Refer to FSU-10, "
Removal and Installation".
10. Separate upper link from steering knuckle, using t he ball joint remover (commercial service tool), and
remove upper link.
CAUTION:
 Temporarily tighten the nut to prevent damage to threads and to prevent the ball joint remover
from suddenly coming off.
1. Circular clip 2. Dust shield 3. Housing
4. Snap ring 5. Ball cage/steel ball/inner race assem-
bly6. Stopper ring
7. Boot band 8. Boot 9. Shaft
10. Circular clip 11. Joint sub-assembly : Wheel side
: NISSAN genuine grease or an equivalent.
Refer to GI-4, "
Components" for symbols not described on the above.
JPDIF0279ZZ
Revision: 2010 May2011 QX56

FSU-10
< REMOVAL AND INSTALLATION >
FRONT COIL SPRING AND SHOCK ABSORBER
CAUTION:
The shock absorber assembly cannot be disassembled.
Removal and InstallationINFOID:0000000006225643
REMOVAL
1. Reduce system pressure. (With HBMC) Refer to SCS-18, "Work Procedure".
CAUTION:
Inadvertent piping removal causes fluid to splatter.
2. Remove tires with power tool. Refer to WT-64, "
Removal and Installation".
3. Remove brake hose bracket from steering knuckle. Refer to BR-23, "
FRONT : Removal and Installation".
4. Remove caliper assembly mounting bolts. Hang caliper assembly in a place where it will not interfere with work. Refer to BR-37, "
BRAKE CALIPER ASSEMBLY : Removal and Installation".
CAUTION:
Never depress brake pedal while brake caliper is removed.
5. Remove disc rotor. Refer to FA X - 8 , "
Removal and Installation" (2WD), FAX-18, "Removal and Installation"
(4WD).
6. Remove wheel sensor and harness connector. Refer to BRC-134, "
FRONT WHEEL SENSOR : Removal
and Installation".
CAUTION:
Never pull on wheel sensor harness.
7. Remove steering outer socket fr om steering knuckle. Refer to ST-42, "
Removal and Installation".
8. Remove height sensor from upper link (right side). Refer to EXL-136, "
Removal and Installation".
9. Set suitable jack under lower link.
10. Remove stabilizer connecting rod from lower link. (Without HBMC) Refer to FSU-20, "
Removal and Instal-
lation".
11. Separate upper link from steering knuckle. Refer to FSU-17, "
Removal and Installation".
1. Shock absorber assembly 2. Lower link
Refer to GI-4, "
Components" for symbols in the figure.
JPEIA0256GB
Revision: 2010 May2011 QX56

FSU-14
< REMOVAL AND INSTALLATION >
LOWER LINK
LOWER LINK
Exploded ViewINFOID:0000000006225646
Removal and InstallationINFOID:0000000006225647
REMOVAL
1. Remove tires with power tool. Refer to WT-64, "Removal and Installation".
2. Remove brake hose bracket from steering knuckle. Refer to BR-23, "
FRONT : Removal and Installation".
3. Remove caliper assembly mounting bolts. Hang caliper assembly in a place where it will not interfere with work. Refer to BR-37, "
BRAKE CALIPER ASSEMBLY : Removal and Installation".
CAUTION:
Never depress brake pedal while brake caliper is removed.
4. Remove disc rotor. Refer to FA X - 8 , "
Removal and Installation" (2WD), FAX-18, "Removal and Installation"
(4WD).
5. Remove wheel sensor and harness connector. Refer to BRC-134, "
FRONT WHEEL SENSOR : Removal
and Installation".
CAUTION:
Never pull on wheel sensor harness.
6. Remove steering outer socket fr om steering knuckle. Refer to ST-42, "
Removal and Installation".
7. Remove height sensor from upper link (right side). Refer to EXL-136, "
Removal and Installation".
8. Set suitable jack under lower link.
9. Remove stabilizer connecting rod from lower link. (Without HBMC) Refer to FSU-20, "
Removal and Instal-
lation".
10. Remove shock absorber mounting bolt from lower link.
11. Separate upper link from steering knuckle. Refer to FSU-17, "
Removal and Installation".
1. Upper link 2. Eccentric disc 3. Lower link
4. Bump rubber 5. Adjusting bolt
Refer to GI-4, "
Components" for symbols in the figure.
JPEIA0237GB
Revision: 2010 May2011 QX56

UPPER LINKFSU-17
< REMOVAL AND INSTALLATION >
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UPPER LINK
Exploded ViewINFOID:0000000006225649
Removal and InstallationINFOID:0000000006225650
REMOVAL
1. Remove tires with power tool. Refer to WT-64, "Removal and Installation".
2. Remove brake hose bracket from steering knuckle. Refer to BR-23, "
FRONT : Removal and Installation".
3. Remove caliper assembly mounting bolts. Hang caliper assembly in a place where it will not interfere with work. Refer to BR-37, "
BRAKE CALIPER ASSEMBLY : Removal and Installation".
CAUTION:
Never depress brake pedal while brake caliper is removed.
4. Remove disc rotor. Refer to FA X - 8 , "
Removal and Installation" (2WD), FAX-18, "Removal and Installation"
(4WD).
5. Remove wheel sensor and harness connector. Refer to BRC-134, "
FRONT WHEEL SENSOR : Removal
and Installation".
CAUTION:
Never pull on wheel sensor harness.
6. Remove height sensor from upper link (right side). Refer to EXL-136, "
Removal and Installation".
7. Set suitable jack under lower link.
8. Separate upper link from steering knuckle. Refer to FA X - 8 , "
Removal and Installation" (2WD), FAX-18,
"Removal and Installation" (4WD).
9. Remove upper link mounting bolts, nuts, and upper link from vehicle.
10. Perform inspection after removal. Refer to FSU-18, "
Inspection".
1. Upper link 2. Eccentric disc 3. Lower link
4. Bump rubber 5. Adjusting bolt
Refer to GI-4, "
Components" for symbols in the figure.
JPEIA0237GB
Revision: 2010 May2011 QX56