Qashqai J11. Brake system — part 4
BR-50
< PRECAUTION >
[RHD]
PRECAUTIONS
Precaution for Procedure without Cowl Top Cover
INFOID:0000000010305431
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
Precaution for Brake System
INFOID:0000000010305432
WARNING:
Clean any dust from the front brake and rear brake with a vacuum dust collector. Never blow with com-
pressed air.
CAUTION:
• Only use “DOT 4” brake fluid. Refer to
MA-59, "Fluids and Lubricants"
.
• Never reuse drained brake fluid.
• Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it
off immediately and wash with water if it gets on a painted surface.
• Always clean with new brake fluid when cleaning the master cylinder, brake caliper and other com-
ponents.
• Never use mineral oils such as gasoline or light oil to clean. They may damage rubber parts and
cause improper operation.
• Always loosen the brake tube flare nut with a flare nut wrench.
• Tighten the brake tube flare nut to the specified torque with
flare nut torque wrench (A).
• Always confirm the specified tightening torque when install-
ing the brake pipes.
• Turn the ignition switch OFF and disconnect the ABS actuator
and electric unit (control unit) connector or the battery nega-
tive terminal before performing the work.
• Check that no brake fluid leakage is present after replacing
the parts.
• Burnish the brake contact surfaces after refinishing or replac-
ing rotors, after replacing pads, or if a soft pedal occurs at
very low mileage. Refer to
BR-79, "BRAKE PAD : Inspection
(front brake pad),
BR-82, "BRAKE CALIPER ASSEMBLY : Inspection and Adjust-
BR-85, "BRAKE PAD : Inspection and Adjustment"
(rear brake pad),
"BRAKE CALIPER ASSEMBLY : Inspection and Adjustment"
(rear disc rotor).
PIIB3706J
JPFIA0061ZZ
PREPARATION
BR-51
< PREPARATION >
[RHD]
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PREPARATION
PREPARATION
Commercial Service Tool
INFOID:0000000010305433
Tool name
Description
Pin punch
a: 4 mm (0.16 in) dia.
Removing and installing reservoir tank
pin
NT410
BR-52
< PERIODIC MAINTENANCE >
[RHD]
BRAKE PEDAL
PERIODIC MAINTENANCE
BRAKE PEDAL
Inspection and Adjustment
INFOID:0000000010305434
INSPECTION
Brake Pedal Height
Check the height (H
1
) between the accelerator pedal stopper (1) and
the brake pedal upper surface.
CAUTION:
Remove the floor trim.
ASCD brake Switch and Stop Lamp Switch
Check the clearance (C) between bracket (1) and ASCD brake
switch/stop lamp switch (2) threaded end.
CAUTION:
The stop lamp must be turned off when the brake pedal is
released.
NOTE:
Pull the brake pedal pad to make the clearance between bracket and ASCD brake switch/stop lamp switch
threaded end.
Brake Pedal Play
Press the brake pedal. Check the brake pedal play (A).
Depressed Brake Pedal Height
Standard
Brake pedal height (H
1
)
: Refer to
.
JPFIA0119ZZ
Standard
Clearance (C) between
bracket and ASCD brake
switch/stop lamp switch
threaded end
: Refer to
.
JPFIA0206ZZ
Standard
Pedal play (A)
: Refer to
.
JPFIA0121ZZ
BRAKE PEDAL
BR-53
< PERIODIC MAINTENANCE >
[RHD]
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Check the height between the accelerator pedal stopper (1) and the
brake pedal upper surface (H
2
) when depressing the brake pedal at
490 N (50 kg, 110 lb) while turning engine ON.
CAUTION:
Remove the floor trim.
ADJUSTMENT
Brake Pedal Height
1.
Disconnect the harness connector from ASCD brake switch and stop lamp switch.
2.
Turn the ASCD brake switch and stop lamp switch 45
°
counterclockwise.
3.
Loosen the input rod lock nut (1). Adjust the brake pedal to the
specification. Tighten the input rod lock nut to the specification.
Refer to
.
CAUTION:
The threaded end of the input rod (2) must project to the
inner side (L) of the clevis (3).
ASCD brake Switch and Stop Lamp Switch
1.
Disconnect the harness connector from ASCD brake switch and stop lamp switch.
2.
Turn the ASCD brake switch and stop lamp switch 45
°
counterclockwise.
3.
Press-fit ASCD brake switch/stop lamp switch (2) until ASCD
brake switch/stop lamp switch hits the bracket (1) 45
°
clockwise.
CAUTION:
• The clearance (C) between the bracket and ASCD brake
switch/stop lamp switch threaded end must be the speci-
fied value. Refer to
.
• The stop lamp must be turned off when the brake pedal is
released.
Brake Pedal Play
1.
Disconnect the harness connector from ASCD brake switch and stop lamp switch.
2.
Turn the ASCD brake switch and stop lamp switch 45
°
counterclockwise.
Standard
Depressed brake pedal
height (H
2
)
: Refer to
JPFIA0120ZZ
JPFIA0003ZZ
Standard
Brake pedal height (H
1
)
: Refer to
JPFIA0119ZZ
JPFIA0206ZZ
BR-54
< PERIODIC MAINTENANCE >
[RHD]
BRAKE PEDAL
3.
Press-fit ASCD brake switch/stop lamp switch (2) until ASCD
brake switch/stop lamp switch hits the bracket (1) 45
°
clockwise.
CAUTION:
• The clearance (C) between the bracket and ASCD brake
switch/stop lamp switch threaded end must be the speci-
fied value. Refer to
.
• The stop lamp must be turned off when the brake pedal is
released.
JPFIA0206ZZ
BRAKE FLUID
BR-55
< PERIODIC MAINTENANCE >
[RHD]
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BRAKE FLUID
Inspection
INFOID:0000000010305435
BRAKE FLUID LEVEL
• Check that the fluid level in the reservoir tank is within the specified
range (MAX – MIN lines).
• Visually check for any brake fluid leakage around the reservoir
tank.
• Check the brake system for any leakage if the fluid level is
extremely low (lower than MIN).
• Check the brake system for fluid leakage if the warning lamp
remains illuminated even after the parking brake is released.
BRAKE LINE
1.
Check brake line (tubes and hoses) for cracks, deterioration or other damage. Replace any damaged
parts.
2.
Check for fluid leakage by fully depressing brake pedal while
engine is running.
CAUTION:
If leakage occurs around joints, retighten or, if necessary,
replace damaged parts.
Draining
INFOID:0000000010305436
CAUTION:
• Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it
off immediately and wash with water if it gets on a painted surface.
• Turn the ignition switch OFF and disconnect the ABS actuator and electric unit (control unit) con-
nector or the battery negative terminal before draining.
1.
Connect a vinyl tube to the bleed valve.
2.
Depress the brake pedal and loosen the bleeder valve to gradu-
ally discharge brake fluid.
Refilling
INFOID:0000000010305437
CAUTION:
Turn the ignition switch OFF and disconnect the ABS actuator and electric unit (control unit) connec-
tor or the battery negative terminal before refilling.
JPFIA0007ZZ
SBR389C
BRA0007D
BR-56
< PERIODIC MAINTENANCE >
[RHD]
BRAKE FLUID
1.
Check that there is no foreign material in the reservoir tank, and
refill with new brake fluid.
CAUTION:
Never reuse drained brake fluid.
2.
Loosen the bleeder valve, slowly depress the brake pedal to the
full stroke, and then release the pedal. Repeat this operation at
intervals of 2 or 3 seconds until all brake fluid is discharged.
Then close the bleeder valve with the brake pedal depressed.
Repeat the same work on each wheel.
3.
Perform the air bleeding. Refer to
Bleeding Brake System
INFOID:0000000010305438
CAUTION:
• Turn the ignition switch OFF and disconnect the ABS actuator and electric unit (control unit) con-
nector or the battery negative terminal before performing the work.
• Monitor the fluid level in the reservoir tank during the air bleeding.
• Always use new brake fluid for refilling. Never reuse the drained brake fluid.
1.
Connect a vinyl tube to the bleeder valve of the rear left brake.
2.
Fully depress the brake pedal 4 to 5 times.
3.
Loosen the bleeder valve and bleed air with the brake pedal depressed, and then quickly tighten the
bleeder valve.
4.
Repeat steps 2 and 3 until all of the air is out of the brake line.
In case of EPB rear caliper, operate parkink brake 5 times to bleed the air.
5.
Tighten the bleeder valve to the specified torque. Refer to
BR-80, "BRAKE CALIPER ASSEMBLY :
(front disc brake),
BR-86, "BRAKE CALIPER ASSEMBLY : Exploded View"
(rear disc
brake).
6.
Perform steps 1 to 5 for the rear left brake
→
front right brake
→
rear right brake
→
and front left brake in
order.
7.
Check that the fluid level in the reservoir tank is within the specified range after air bleeding. Refer to
PFIA0403J
BRAKE MASTER CYLINDER
BR-57
< PERIODIC MAINTENANCE >
[RHD]
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BRAKE MASTER CYLINDER
Inspection
INFOID:0000000010305439
FLUID LEAK
Check for brake fluid leakage from the master cylinder mounting face, reservoir tank mounting face and brake
tube connections.
BR-58
< PERIODIC MAINTENANCE >
[RHD]
BRAKE BOOSTER
BRAKE BOOSTER
Inspection
INFOID:0000000010305440
OPERATION
Depress the brake pedal several times at 5-second intervals with the
engine stopped. Start the engine with the brake pedal fully
depressed. Check that the clearance between brake pedal and dash
lower panel decreases.
NOTE:
A slight impact with a small click may be felt on the pedal when the
brake pedal is fully depressed. This is a normal phenomenon due to
the brake system operation.
AIR TIGHT
• Idle the engine for 1 minute to apply vacuum to the brake booster,
and stop the engine. Then depress the brake pedal several times
at 5-second intervals until the accumulated vacuum is released to
atmospheric pressure. Check that the clearance between brake
pedal and dash lower panel gradually increases (A
→
B
→
C) each
time the brake pedal is depressed during this operation.
• Depress the brake pedal with the engine running. Then stop the
engine while holding down the brake pedal. Check that the brake
pedal stroke does not change after holding down the brake pedal
for 30 seconds or more.
NOTE:
A slight impact with a small click may be felt on the pedal when the
brake pedal is fully depressed. This is a normal phenomenon due
to the brake system operation.
BRA0037D
JPFIA0043ZZ
JPFIA0044ZZ
FRONT DISC BRAKE
BR-59
< PERIODIC MAINTENANCE >
[RHD]
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FRONT DISC BRAKE
BRAKE PAD
BRAKE PAD : Inspection
INFOID:0000000010305441
PAD WEAR
Check pad thickness from an inspection hole on cylinder body.
Check using a scale if necessary.
DISC ROTOR
DISC ROTOR : Inspection
INFOID:0000000010305442
APPEARANCE
Check surface of disc rotor for uneven wear, cracks, and serious damage. Replace if there are.
RUNOUT
1.
Fix the disc rotor to the wheel hub and bearing assembly with
wheel nuts (2 points at least).
2.
Inspect the runout with a dial gauge. [Measured at 10 mm (0.39
in) inside the disc edge.]
NOTE:
Check the wheel bearing axial end play before the inspection.
Refer to
(4WD).
3.
Find the installation position with a minimum runout by shifting the disc rotor-to-wheel hub and bearing
assembly installation position by one hole at a time if the runout exceeds the limit value.
4.
Replace or lathe the disc rotor if the runout exceeds the limit even after the above operation.
THICKNESS
Check the thickness of the disc rotor using a micrometer. Replace
the disc rotor if the thickness is below the wear limit.
Standard thickness
: Refer to
.
Wear limit thickness
: Refer to
.
BRA0010D
Runout limit
: Refer to
.
SBR019B
Wear limit thickness
: Refer to
.
SBR020B
BR-60
< PERIODIC MAINTENANCE >
[RHD]
REAR DISC BRAKE
REAR DISC BRAKE
BRAKE PAD
BRAKE PAD : Inspection
INFOID:0000000010305443
PAD WEAR
Check pad thickness from an inspection hole on cylinder body.
Check using a scale if necessary.
DISC ROTOR
DISC ROTOR : Inspection
INFOID:0000000010305444
APPEARANCE
Check surface of disc rotor for uneven wear, cracks, and serious damage. Replace if there are.
RUNOUT
1.
Fix the disc rotor to the wheel hub and bearing assembly with
wheel nuts (2 points at least).
2.
Inspect the runout with a dial gauge. [Measured at 10 mm (0.39
in) inside disc edge.]
NOTE:
Check the wheel bearing axial end play before the inspection.
Refer to
(4WD).
3.
Find the installation position with a minimum runout by shifting the disc rotor-to-wheel hub and bearing
assembly installation position by one hole at a time if the runout exceeds the limit value.
4.
Replace or lathe the disc rotor if the runout exceeds the limit even after the above operation.
THICKNESS
Check the thickness of the disc rotor using a micrometer. Replace
the disc rotor if the thickness is below the wear limit.
Standard thickness
: Refer to
.
Wear limit thickness
: Refer to
.
BRA0010D
Runout limit
: Refer to
.
BRA0697D
Wear limit thickness
: Refer to
.
SFIA2284E
BRAKE PEDAL
BR-61
< REMOVAL AND INSTALLATION >
[RHD]
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REMOVAL AND INSTALLATION
BRAKE PEDAL
Exploded View
INFOID:0000000010305445
*
AT model
Removal and Installation
INFOID:0000000010471511
REMOVAL
1.
Remove instrument lower panel LH. Refer to
IP-13, "Removal and Installation"
2.
Remove the knee protector. Refer to
.
3.
Remove snap pin and clevis pin from clevis of brake booster.
4.
Disconnect the harness connectors from the stop lamp switch and brake pedal position switch.
5.
Remove the accelerator pedal. Refer to
ACC-3, "Removal and Installation"
.
6.
Remove the brake pedal
CAUTION:
Support the brake booster and master cylinder to prevent contact with other components.
INSTALLATION
Note the following, and installation is the reverse order of removal.
• Apply the multi-purpose grease to the clevis pin and the mating faces. (Not necessary if grease has been
already applied.)
NOTE:
The clevis pin may be inserted in either direction.
1.
Clevis pin
2.
Brake pedal assembly
3.
Stop lamp switch
4.
ASCD brake switch (shift lock brqke
switch*)
5.
Clip
6.
Snap pin
: Apply multi-purpose grease.
Refer to
for symbols not described on the above.
E1FIA0147GB
BR-62
< REMOVAL AND INSTALLATION >
[RHD]
BRAKE PEDAL
Inspection and Adjustment
INFOID:0000000010305447
INSPECTION AFTER REMOVAL
• Check the following items and replace the brake pedal assembly if necessary.
- Check the brake pedal upper rivet for deformation.
- Check the brake pedal for bend, damage, and cracks on the welded parts.
• Check clevis pin and plastic stopper (A) for damage and deforma-
tion. If any is found, replace clevis pin.
ADJUSTMENT AFTER INSTALLATION
• Perform the brake pedal adjustment after installing the brake pedal assembly. Refer to
• Perform the accelerator pedal check after installing the accelerator pedal. Refer to
.
PFIA0756J
BRAKE PIPING
BR-63
< REMOVAL AND INSTALLATION >
[RHD]
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BRAKE PIPING
FRONT
FRONT : Exploded View
INFOID:0000000010305452
1.
Brake tube
2.
Brake booster
3.
Master cylinder assembly
4.
Connector
5.
ABS actuator and electric unit (con-
trol unit)
6.
Lock plate
7.
Brake hose
8.
Union bolt
A.
To front brake hose
B.
To rear brake tube
Refer to
E1FIA0149GB
BR-64
< REMOVAL AND INSTALLATION >
[RHD]
BRAKE PIPING
FRONT : Hydraulic Piping
INFOID:0000000010305453
FRONT : Removal and Installation
INFOID:0000000010305454
REMOVAL
CAUTION:
Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it
off immediately and wash with water if it gets on a painted surface.
1.
Remove tires.
2.
Drain brake fluid. Refer to
.
3.
Loosen the flare nut with a flare nut wrench and separate the brake tube from the hose.
CAUTION:
• Never scratch the flare nut and the brake tube.
• Never bend sharply, twist or strongly pull out the brake hoses and tubes.
• Cover open end of brake tubes and hoses when disconnecting to prevent entrance of dirt.
4.
Remove the union bolt and remove the brake hose from the brake caliper assembly.
5.
Remove the lock plate and remove the brake hose.
INSTALLATION
CAUTION:
Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it
off immediately and wash with water if it gets on a painted surface.
1.
Assemble the union bolt and the copper washer to the brake hose.
CAUTION:
Never reuse the copper washer.
1.
Brake booster
2.
Master cylinder assembly
3.
Front disc brake
4.
ABS actuator and electric unit (con-
trol unit)
5.
Connector
6.
Rear disc brake
A.
Brake tube
B.
Brake hose
: Flare nut
: Union bolt
: Connector
JPFIA0079ZZ
BRAKE PIPING
BR-65
< REMOVAL AND INSTALLATION >
[RHD]
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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 hoses and tubes are not twisted and
bent.
4.
Tighten the flare nut to the specified torque with a flare nut
torque wrench.
CAUTION:
Never scratch the flare nut and the brake tube.
5.
Refill with new brake fluid and perform the air bleeding. Refer to
BR-56, "Bleeding Brake System"
.
CAUTION:
Never reuse drained brake fluid.
6.
Install tires.
FRONT : Inspection
INFOID:0000000010305455
INSPECTION AFTER INSTALLATOIN
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 approximately
5 seconds 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
REAR : Exploded View
INFOID:0000000010305456
JPFIA0099ZZ
JPFIA0077GB
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