lock INFINITI QX56 2011 Factory Repair Manual

BR-8
< PERIODIC MAINTENANCE >
BRAKE PEDAL
Brake Pedal Height
1. Remove instrument lower panel LH. Refer to IP-14, "Removal and Installation".
2. Disconnect the stop lamp switch harness c onnector and the brake switch harness connector.
3. Loosen the stop lamp switch and brake switch by turning it 45 ° counterclockwise.
4. Loosen the input rod lock nut (1).
5. Rotate the input rod (2), and adjust the brake pedal to the speci- fied height.
CAUTION:
 Perform it with the floor trim removed.
 The threaded end of the in put rod must project to the
inner side of the clevis (3).
6. Tighten the lock nut. Refer to BR-28, "
Exploded View".
7. Adjust the clearance between the brake pedal bracket and the stop lamp switch and brake switch threaded end after adjusting
the brake pedal height.
Stop Lamp Switch and Brake Switch
1. Remove instrument lower panel LH. Refer to IP-14, "Removal and Installation".
2. Disconnect the stop lamp switch harness c onnector and the brake switch harness connector.
3. Loosen the stop lamp switch and brake switch by turning it 45 ° counterclockwise.
4. Press-fit the stop lamp switch and brake switch (2) until the stop
lamp switch and brake switch hits the brake pedal bracket (1)
45 ° clockwise while pulling the brake pedal pad slightly.
CAUTION:
 The clearance (C) between the brake pedal bracket and
stop lamp switch and brake switch threaded end and
must be the specified value.
 The stop lamp must turn off when the brake pedal is released.
Brake Pedal Play
1. Remove instrument lower panel LH. Refer to IP-14, "Removal and Installation".
2. Disconnect the stop lamp switch harness c onnector and the brake switch harness connector.
3. Loosen the stop lamp switch and brake switch by turning it 45 ° counterclockwise.
JPFIA0662ZZ
H1: Refer to BR-47, "Brake Pedal".
JPFIA0279ZZ
C : Refer to BR-47, "Brake Pedal".
JPFIA0674ZZ
Revision: 2010 May2011 QX56

BRAKE PEDALBR-9
< PERIODIC MAINTENANCE >
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4. Press-fit the stop lamp switch and brake switch (2) until the stop
lamp switch and brake switch hits the brake pedal bracket (1)
45 ° clockwise while pulling the brake pedal pad slightly.
CAUTION:
 The clearance (C) between the brake pedal bracket and stop lamp switch and brake switch threaded end and
must be the specified value.
 The stop lamp must turn off when the brake pedal is released.
Depressed Brake Pedal Height
1. Perform the air bleeding. Refer to BR-11, "Bleeding Brake System".
2. Check the height between the dash lower panel (1) and the top face of the brake pedal (H
2) when depressing the brake pedal
with a force of 490 N (50 kg, 110 lb) while the engine is running.
CAUTION:
Perform it with the floor trim removed.
3. Adjust the brake pedal play after adjusting the brake pedal height, clearance between the brake pedal bracket and the stop
lamp switch and brake switch threaded end.C : Refer to
BR-47, "
Brake Pedal".
JPFIA0674ZZ
H2: Refer to BR-47, "Brake Pedal".
JPFIA0068ZZ
Revision: 2010 May2011 QX56

BR-20
< REMOVAL AND INSTALLATION >
BRAKE PEDAL
REMOVAL AND INSTALLATION
BRAKE PEDAL
Exploded ViewINFOID:0000000006222472
Removal and InstallationINFOID:0000000006222473
REMOVAL
CAUTION:
Never removing brake pedal stroke sensor. (With pre-crash seat belt)
1. Remove the instrument lower panel LH. Refer to IP-14, "
Removal and Installation".
2. Disconnect the brake pedal stroke sensor har ness connector. (With pre-crash seat belt)
3. Disconnect the stop lamp switch harness connector and brake switch harness connector.
4. Rotate the stop lamp switch and the brake switch counterclockwise to remove.
5. Remove the snap pin, and then remove the clevis pin from the clevis of brake booster.
6. Remove the brake pedal assembly. CAUTION:
Hold the hydraulic booster assembly so as not to drop out or contact them other parts.
7. Perform inspection after removal. Refer to BR-21, "
Inspection and Adjustment".
INSTALLATION
Note the following, and install in the reverse order of removal.
 Apply the multi-purpose grease to the clevis pin and the matching faces.
1. Brake pedal stroke sensor (with pre-
crash seat belt) 2. Clevis pin 3. Brake pedal assembly
4. Brake pedal pad 5. Clip 6. Brake switch
7. Stop lamp switch 8. Snap pin : Apply multi-purpose grease.
Refer to GI-4, "
Components" for symbols not described on the above.
JPFIA0723GB
Revision: 2010 May2011 QX56

BR-22
< REMOVAL AND INSTALLATION >
BRAKE PIPING
BRAKE PIPING
FRONT
FRONT : Exploded ViewINFOID:0000000006222475
1. Brake tube 2. Connector 3. Connector bracket
4. Hydraulic booster assembly 5. Lock plate 6. Brake hose bracket
7. Copper washer 8. Union bolt 9. Brake hose
A. To rear brake tube
Refer to GI-4, "
Components" for symbols in the figure.
JPFIA0794GB
Revision: 2010 May2011 QX56

BRAKE PIPINGBR-23
< REMOVAL AND INSTALLATION >
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FRONT : Hydraulic PipingINFOID:0000000006222476
FRONT : Removal and InstallationINFOID:0000000006222477
REMOVAL
CAUTION:
 If the brake fluid adheres to the brake caliper assembly and disc rotor, quickly wipe it off.
 Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it
off immediately and wash with wate r if it gets on a painted surface.
 Never depress the brake pedal. Brake fluid may spl ash while removing the brake hose or brake tube.
1. Remove tires with power tool.
2. Drain brake fluid. Refer to BR-10, "
Draining".
3. Loosen the flare nut with a flare nut wrench and separate the brake tube and the brake hose.
CAUTION:
 Never scratch the flare nut and the brake tube.
 Never bend sharply, twist or strongly pull out the brake hose or brake tube.
 Cover open end of brake hose or brake tube wh en disconnecting to prevent entrance of dirt.
4. Remove the union bolt and copper washers, and remove the brake hose from the brake caliper assembly.
5. Remove the brake hose mounting nut.
6. Remove the lock plate and remove the brake hose.
7. Remove the brake hose bracket.
INSTALLATION
CAUTION:
 If the brake fluid adheres to the brake caliper assembly and disc rotor, quickly wipe it off.
 Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it
off immediately and wash with wate r if it gets on a painted surface.
 Never depress the brake pedal. Brake fluid may spl ash while removing the brake hose or brake tube.
1. Install the brake hose bracket.
2. Assemble the union bolt and the copper washers to the brake hose. CAUTION:
1. Front disc brake 2. Connector 3. Hydraulic booster assembly
4. Rear disc brake
A. Brake hose B. Brake tube
: Flare nut
: Union bolt
JPFIA0726ZZ
Revision: 2010 May2011 QX56

BR-24
< REMOVAL AND INSTALLATION >
BRAKE PIPING
Never reuse the copper washer.
3. Install the brake hose L-pin by aligning it with the brake caliper assembly positioning hole, and tighten the union bolt (1) to the
specified torque.
4. Install the brake tube to the brake hose, temporarily tighten the flare nut by hand until it does not rotate further, and fix the brake
hose to the bracket with the lock plate.
CAUTION:
Check that all brake hose or brake tube are not twisted and
bent.
5. Tighten the flare nut to the specified torque with a crowfoot and torque wrench.
CAUTION:
Never scratch the flare nut and the brake tube.
6. Tighten the brake hose mounting nuts to the specified torque. CAUTION:
Never reuse the brake hose mounting nuts.
7. Perform the air bleeding. Refer to BR-11, "
Bleeding Brake System".
8. Install tires with power tool. Refer to WT-64, "
Exploded View".
9. Perform inspection after installation. Refer to BR-24, "
FRONT : Inspection".
FRONT : InspectionINFOID:0000000006222478
INSPECTION AFTER INSTALLATION
1. Check the brake hoses and tubes for the following: no scratches; no twist and deformation; no interfer-
ence with other components when steering the steering wheel; no looseness at connections.
2. Depress the brake pedal with a force of 785 N (80 kg, 176 lb) and hold down the pedal for approx. 5 sec- onds with the engine running. Check for any fluid leakage.
CAUTION:
Retighten the applicable connection to the specified torque and repair any abnormal (damaged,
worn or deformed) part if any brake fluid leakage is present.
REAR
JPFIA0012ZZ
Revision: 2010 May2011 QX56

BRAKE PIPINGBR-25
< REMOVAL AND INSTALLATION >
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REAR : Exploded ViewINFOID:0000000006222479
REAR : Hydraulic PipingINFOID:0000000006222480
1. Brake tube 2. Lock plate 3. Brake hose
4. Union bolt 5. Copper washer
A. To connector
Refer to GI-4, "
Components" for symbols in the figure.
JPFIA0795GB
JPFIA0726ZZ
Revision: 2010 May2011 QX56

BR-26
< REMOVAL AND INSTALLATION >
BRAKE PIPING
REAR : Removal and Installation
INFOID:0000000006222481
REMOVAL
CAUTION:
 If the brake fluid adheres to the brake caliper assembly and disc rotor, quickly wipe it off.
 Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it
off immediately and wash with wate r if it gets on a painted surface.
 Never depress the brake pedal. Brake fluid may spl ash while removing the brake hose or brake tube.
1. Remove tires with power tool.
2. Drain brake fluid. Refer to BR-10, "
Draining".
3. Loosen the flare nut with a flare nut wrench and separate the brake tube and the brake hose. CAUTION:
 Never scratch the flare nut and the brake tube.
 Never bend sharply, twist or strongly pull out the brake hose or brake tube.
 Cover open end of brake hose or brake tube wh en disconnecting to prevent entrance of dirt.
4. Remove the union bolt and copper washers, and remove the brake hose from the brake caliper assembly.
5. Remove the lock plate and remove the brake hose.
INSTALLATION
CAUTION:
 If the brake fluid adheres to the brake caliper assembly and disc rotor, quickly wipe it off.
 Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it
off immediately and wash with wate r if it gets on a painted surface.
 Never depress the brake pedal. Brake fluid may spl ash while removing the brake hose or brake tube.
1. Assemble the union bolt and the copper washers to the brake hose. CAUTION:
Never reuse the copper washer.
2. Align the brake hose pin to the projection (A) of the brake caliper
assembly and tighten the union bolt (1) to the specified torque.
3. Install the brake tube to the brake hose, temporarily tighten the flare nut by hand until it does not rotate further, and fix the brake
hose to the bracket with the lock plate.
CAUTION:
Check that all brake hose or brake tube are not twisted and
bent.
4. Tighten the flare nut to the specified torque with a crowfoot and torque wrench.
CAUTION:
Never scratch the flare nut and the brake tube.
5. Perform the air bleeding. Refer to BR-11, "
Bleeding Brake System".
6. Install tires with power tool. Refer to WT-64, "
Exploded View".
7. Perform inspection after installation. Refer to BR-26, "
REAR : Inspection".
REAR : InspectionINFOID:0000000006222482
INSPECTION AFTER INSTALLATION
1. Check the brake hoses and tubes for the following: no scratches; no twist and deformation; no interfer-
ence with other components when steering the steering wheel; no looseness at connections.
1. Front disc brake 2. Connector 3. Hydraulic booster assembly
4. Rear disc brake
A. Brake hose B. Brake tube
: Flare nut
: Union bolt
JPFIA0099ZZ
Revision: 2010 May2011 QX56

BR-28
< REMOVAL AND INSTALLATION >
HYDRAULIC BOOSTER ASSEMBLY
HYDRAULIC BOOSTER ASSEMBLY
Exploded ViewINFOID:0000000006222483
REMOVAL
DISASSEMBLY
1. Hydraulic booster assembly 2. Lock nut 3. Clevis
Refer to GI-4, "
Components" for symbols in the figure.
JPFIA0767GB
Revision: 2010 May2011 QX56

BR-32
< REMOVAL AND INSTALLATION >
HYDRAULIC BOOSTER ASSEMBLY
 Apply new brake fluid to grommet of between reservoir tank and grommet and ABS actuator and electric unit
(control unit).
Inspection and AdjustmentINFOID:0000000006222486
ADJUSTMENT BEFORE INSTALLATION
Input Rod Length adjustment
1. Loosen the lock nut (1) and adjust the input rod (2) to the speci-
fied length (A).
2. Tighten the lock nut to the specified torque.
INSPECTION AFTER INSTALLATION
Operation Check
1. Turn the ignition switch OFF.
2. Depress the brake pedal 20 times or more. NOTE:
The pressure loss in the accumulator results in a large brake pedal stroke. In addition to this, the brake
pedal depression becomes lighter in initial stage.
3. Check that the fluid level in the reservoir tank is MAX line.
4. Position the selector lever in P range to release the parking brake.
5. Turn the ignition switch ON to check the time between motor activation and motor stop.
6. After the motor is stopped, check that the ABS warn ing lamp and the VDC warning lamp in the combina-
tion meter are OFF when the engine is started.
7. Stop the engine (ignition switch OFF).
8. Turn the ignition switch ON and depress the brake pedal 4 to 5 times to check the time between motor activation and motor stop.
9. Turn the ignition switch OFF. Turn the ignition swit ch ON again. Check that the VDC warning lamp turns
ON when the brake pedal is depressed 15 to 20 times.
10. Check that the VDC warning lamp turns ON when the brake pedal is depressed 15 to 20 times after the lapse of 120 seconds or more after the ignition switch is turned ON again.
11. Perform the self-diagnosis for “ABS” with CONSULT- III and erase all the stored self-diagnosis results.
Function Check
1. Turn the ignition switch OFF.
2. Depress the brake pedal 20 times or more.
NOTE:
The pressure loss in the accumulator results in a large brake pedal stroke. In addition to this, the brake
pedal depression becomes lighter in initial stage.
3. Turn the ignition switch ON with the brake pedal depr essed to check that the clearance between the brake
pedal and the dash lower panel decreases. A : Refer to
BR-47, "
Brake Booster".
JPFIA0728ZZ
Motor operating time : 18 seconds or less
Motor operating time : 2 − 11 seconds
Revision: 2010 May2011 QX56