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BRAKE MASTER CYLINDERBR-9
< BASIC INSPECTION >
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BRAKE MASTER CYLINDER
InspectionINFOID:0000000009463684
Check for brake fluid leakage at the following areas:
• Master cylinder mounting face
• Reservoir tank mounting face
• Brake tube and brake tube connections
• Brake hose and brake hose connections
If any brake fluid leakage is found, repair as necessary.
On Board InspectionINFOID:0000000009463685
LEAK INSPECTION
Check for leaks in the master cylinder installation surf ace, reservoir tank installation surface, and brake pipe
and hose connections.
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BR-10
< BASIC INSPECTION >
BRAKE BOOSTER
BRAKE BOOSTER
InspectionINFOID:0000000009463686
OPERATION
Depress the brake pedal several times at five second intervals with
the engine stopped. Start the engine with the brake pedal fully
depressed. Check that the cl earance 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. Th is is normal brake system opera-
tion.
VACUUM INSPECTION
Idle the engine for one minute to apply vacuum to the brake booster.
Stop the engine. Depress the brake pedal several times at five sec-
ond intervals until the accumulated vacuum is released to atmo-
spheric 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. Th is is normal brake system opera-
tion.
BRA0037D
JPFIA0043ZZ
JPFIA0044ZZ
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FRONT DISC BRAKEBR-11
< BASIC INSPECTION >
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FRONT DISC BRAKE
BRAKE PAD
BRAKE PAD : InspectionINFOID:0000000009463687
PA D W E A R
Check brake pad thickness from an inspection hole on caliper body.
Check using a scale if necessary.
DISC ROTOR
DISC ROTOR : InspectionINFOID:0000000009463688
APPEARANCE
Check surface of disc rotor for uneven wear, cracks or damage. Replace if any abnormal conditions exist.
RUNOUT
1. Check the wheel bearing axial end play before the inspection. Refer to FAX-6, "Inspection".
2. Secure the disc rotor to the wheel hub and bearing assembly with wheel nuts at two wheel nut locations.
3. Inspect the runout with a dial gauge, measured at 10 mm (0.39 in) inside the disc edge.
4. 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.
5. Refinish the disc rotor if the runout is outside the limit even after performing the above operation. When refinishing, use Tool.
THICKNESS
Check the thickness of the disc rotor using a micrometer. Replace
the disc rotor if the thick ness is below the wear limit.
Wear limit thickness : Refer to
BR-49, "Front Disc
Brake".
ALFIA0271ZZ
Runout : Refer to BR-49, "Front Disc Brake".
Tool number : 38-PFM90.5 ( — )
SBR019B
Wear thickness : Refer to BR-49, "Front Disc
Brake".
Thickness variation : Refer to BR-49, "Front Disc
Brake".
SBR020B
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BR-12
< BASIC INSPECTION >
REAR DISC BRAKE
REAR DISC BRAKE
BRAKE PAD
BRAKE PAD : InspectionINFOID:0000000009463689
PA D W E A R
Check pad thickness from an inspection hole on caliper body. Check
using a scale if necessary.
DISC ROTOR
DISC ROTOR : InspectionINFOID:0000000009463690
APPERANCE
Check surface of disc rotor for uneven wear, cracks or damage. Replace if any abnormal conditions exist.
RUNOUT
1. Check the wheel bearing axial end play before the inspection. Refer to RAX-8, "Wheel Hub Bearing".
2. Secure the disc rotor to the wheel hub and bearing assembly with wheel nuts at two wheel nut locations.
3. Inspect the runout with a dial gauge, measured at 10 mm (0.39 in) inside the disc edge.
4. 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.
5. Refinish the disc rotor if the runout is outside t he limit even after performing the above operation. When
refinishing, use Tool.
Thickness
Check the thickness of the disc ro tor using a micrometer. Replace
the disc rotor if the thickness is below the minimum thickness. Wear limit thickness : Refer to
BR-49, "Rear Disc
Brake".
ALFIA0272ZZ
Runout : Refer to BR-49, "Rear
Disc Brake".
Tool number : 38-PFM90.5 ( — )
SBR019B
Minimum thickness : Refer to BR-49, "Rear Disc
Brake".
Thickness variation : Refer to BR-49, "Rear Disc
Brake".
SBR020B
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BRAKE PEDALBR-13
< PERIODIC MAINTENANCE >
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PERIODIC MAINTENANCE
BRAKE PEDAL
Inspection and AdjustmentINFOID:0000000009463691
ADJUSTMENT
1. Loosen the stop lamp switch (2) and ASCD cancel switch (1) by turning each counterclockwise by 45 °.
2. Loosen clevis lock nut (1) on the input rod (2), then turn input rod to adjust the brake pedal height to specification. Tighten cle-
vis lock nut (1) to specification.
CAUTION:
• Check the height with the floor trim removed.
• The threaded end of the input rod (2) must project to the
inner side (L) of the clevis (3).
3. With the pedal pulled up and held by hand, press the stop lamp switch (1) and ASCD cancel switch (2) until the threaded end
contacts the brake pedal bracket.
4. With the threaded end of the stop lamp switch (1) and ASCD cancel switch (2) contacting the brake pedal bracket, rotate the
switch clockwise by 45 ° to secure.
CAUTION:
Make sure that the clearance (C) between brake pedal
bracket and end of stop lamp switch (1) and ASCD cancel
switch (2) is within the standard. Refer to BR-48, "Brake
Pedal".
5. Check the brake pedal for smooth operation. CAUTION:
Make sure that stop lamps are off when the brake pedal is released.
ALFIA0277ZZ
Brake pedal height : Refer to BR-48, "Brake Pedal".
Lock nut torque : Refer to BR-28, "Exploded View"
.
JPFIA0003ZZ
ALFIA0278ZZ
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BR-14
< PERIODIC MAINTENANCE >
BRAKE FLUID
BRAKE FLUID
Drain and RefillINFOID:0000000009463692
CAUTION:
• Do not spill or splash brake fluid on painted surf aces. Brake fluid may damage paint. If brake fluid is
splashed on painted areas, wash it away with water immediately.
• Prior to repair, turn the ignition switch OFF, disconnect the ABS actuator and electric unit (control
unit) connector or negative battery terminal. Refer to PG-73, "Removal and Installation (Battery)"
.
• Refill brake system with new brake fluid. Refer to MA-11, "FOR USA AND CANADA : Fluids and
Lubricants".
• Do not reuse drained brake fluid.
DRAINING
1. Turn ignition switch OFF and disconnect ABS actuat or and electric unit (control unit) connector or nega-
tive battery terminal. Refer to PG-73, "Removal and Installation (Battery)"
.
2. Connect a vinyl tube to bleeder valve.
3. Depress brake pedal, loosen bleeder valve, and gradually remove brake fluid.
REFILLING
1. Make sure no foreign material is in the reservoir, and refill withnew brake fluid.
CAUTION:
Do not reuse drained brake fluid.
2. Refill the brake system as follows: • Depress the brake pedal.
• Loosen bleeder valve.
• Slowly depress brake pedal to 2/3 of the brake pedal full
stroke.
• Tighten bleeder valve.
• Release brake pedal.
Repeat this operation at intervals of two or three seconds until
all old brake fluid is discharged. Add new brake flui d to master cylinder reservoir sub tank frequently.
CAUTION:
Do not allow master cylinder reservoir to empt y as this may cause damage to master cylinder
internal components.
3. Bleed the air out of the brake hydraulic system. Refer to BR-14, "Bleeding Brake System"
.
Bleeding Brake SystemINFOID:0000000009463693
BLEEDING BRAKE SYSTEM
CAUTION:
• While bleeding, pay attention to master cylinder fluid level.
• Prior to repair, turn the ignition switch OFF, disconnect the ABS actuator and electric unit (control
unit) connector or negative battery terminal. Refer to PG-73, "Removal and Installation (Battery)"
.
1. Connect a vinyl tube to rear right brake caliper bleeder valve.
2. Fully depress brake pedal ten times.
3. With brake pedal depressed, loosen bleeder valve to bleed air in brake line, and then tighten it immedi-
ately.
BRA0007D
ALFIA0274ZZ
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BRAKE FLUIDBR-15
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4. Repeat steps 2 and 3 until all of the air is out of the brake line.
5. Tighten the bleeder valve to the specified torque. Refer to BR-36, "BRAKE CALIPER ASSEMBLY :
Exploded View" (front disc brake) or BR-39, "BRAKE CALIPER ASSEMBLY : Exploded View" (rear disc
brake).
6. Repeat steps 1 to 5, for the remaining brake calipers with master cylinder reservoir tank filled at least half-
way, bleed air from brake hydraulic line bleeder valves in the following order:
Front right brake →Front left brake →Rear right brake →Rear left brake
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BR-16
< PERIODIC MAINTENANCE >
FRONT DISC BRAKE
FRONT DISC BRAKE
Brake BurnishingINFOID:0000000009463694
CAUTION:
• Burnish contact surfaces between brake pads and disc brake rotor according to the following proce-
dure after refinishing the disc brake rotor, replacing brake pads or if a soft pedal occurs at very low
mileage.
• Be careful of vehicle speed. Brakes do not operat e firmly/securely until pads and disc rotor are
securely seated.
• Only perform this procedure under safe road and traffic conditions. Use extreme caution.
1. Drive the vehicle on straight, flat road.
2. Depress the brake pedal until the vehicle stops.
3. Release the brake pedal for a few minutes to allow the brake components to cool.
4. Repeat steps 1 to 3 until pad and disc rotor are securely seated.
Revision: November 20132014 Altima NAM