Brake System: Diagnosis Nissan Note E12

NVH Troubleshooting Chart

Use the chart below to find the cause of the symptom. If necessary, repair or replace these parts.

Scheme 4

INSPECTION

Check brake pad wear thickness from an inspection hole on cylinder body. Check using a scale if necessary.

Wear thickness: Refer to " FRONT DISC BRAKE ".

Scheme 5

Appearance

Check surface of disc brake rotor for uneven wear, cracks, and serious damage. Replace it if necessary. Refer to " FRONT DISC BRAKE ".

Runout

Scheme 6

1. Secure the disc brake rotor to the wheel hub with wheel nuts (2 points at least).
2. Check the wheel bearing axial end play before the inspection. Refer to " «INSPECTION»(ref-675590-S13946050682014120500000) ".
3. Inspect the runout with a dial indicator to measure at 10 mm (0.39 in) inside the disc edge. Runout: Refer to " «FRONT DISC BRAKE»(ref-675601-S28975622342014120500000) ".
4. Find the installation position that has a minimum runout by shifting the disc brake rotor-to-wheel hub installation position by one hole at a time if the runout exceeds the limit value.
5. Refinish or replace the disc brake rotor if the runout is outside the limit even after performing the above operation. CAUTION: If the thickness is less than wear thickness + 0.3 mm (0.012 in), replace the disc brake rotor. Refer to " «BRAKE CALIPER ASSEMBLY: REMOVAL AND INSTALLATION»(ref-675601-S36053780022014120500000) ". Wear thickness: Refer to " «FRONT DISC BRAKE»(ref-675601-S28975622342014120500000) ".

Thickness

Check the thickness of the disc brake rotor using a micrometer. Replace the disc brake rotor if the thickness is below the wear limit. Refer to " FRONT DISC BRAKE ".

Wear thickness: Refer to " FRONT DISC BRAKE ".

Thickness variation (measured at 8 positions): Refer to " FRONT DISC BRAKE ".

Scheme 7

Brake Lining

Scheme 8

1. Remove plug from back plate. Refer to " «EXPLODED VIEW»(ref-675601-S28518891912014120500000) ".
2. Check brake lining wear thickness (A) from an inspection hole on back plate. Check using a scale if necessary. Wear thickness: Refer to " «REAR DRUM BRAKE»(ref-675601-S36469558682014120500000) ".

Appearance

Check surface of brake drum for uneven wear, cracks and serious damage. Replace it if necessary. Refer to " REMOVAL AND INSTALLATION ".

Note. Make sure the parking brake control is fully released prior to removal of the brake drum. The rear wheel hub is part of the brake drum.

Brake Drum Inner Diameter

Check inner diameter (B) of the brake drum.

Inner diameter: Refer to " REAR DRUM BRAKE ".

Scheme 9

Scheme 10

Note. The CVT brake pedal is shown in the figure. The M/T brake pedal is similar.

INSPECTION AFTER REMOVAL

1. Check the brake pedal for damage and cracks on the welded parts, and replace the brake pedal if necessary.

INSPECTION AFTER INSTALLATION

1. Check the brake hoses and tubes for the following: no scratches; no twist and deformation; no interference with other components when steering the steering wheel; no looseness at connections. CAUTION: Clearance with brake hose and each parts being secured more than 10 mm (0.39 in) in unladen condition*. *: Fuel, engine coolant and lubricant are full. Spare tire, jack, hand tools and mats are in designated positions.
2. Depress the brake pedal with a force of 785 N (80.1 kg-f, 176.5 lb-f) and hold down the brake pedal for approximately 5 seconds with the engine running. Check for any fluid leaks. CAUTION: Retighten the applicable connection to the specified torque and repair any abnormal (damaged, worn or deformed) part if any brake fluid leaks are present.

Scheme 11

Scheme 12

1. Check the brake hoses and tubes for the following: no scratches; no twist and deformation; no looseness at connections. CAUTION: Clearance with brake hose and each parts being secured more than 10 mm (0.39 in) in unladen condition*. *: Fuel, engine coolant and lubricant are full. Spare tire, jack, hand tools and mats are in designated positions.
2. Depress the brake pedal with a force of 785 N (80.1 kg-f, 176.5 lb-f) and hold down the pedal for approximately 5 seconds with the engine running. Check for any fluid leaks. CAUTION: Retighten the applicable connection to the specified torque and repair any abnormal (damaged, worn or deformed) part if any brake fluid leaks are present.

Scheme 13

INSPECTION BEFORE REMOVAL

Check the brake fluid level switch. Refer to " INSPECTION ".

Check the following items and replace if necessary.

1. Check the brake master cylinder for deformation, twist, contact with other parts or looseness of connection.
2. Check for fluid leaks from connections. Refer to " «FRONT: INSPECTION»(ref-675601-S06590451272014120500000) ". CAUTION: If fluid leaks are present, retighten connections to the specified torque. Refer to " «FRONT: EXPLODED VIEW»(ref-675601-S39159554292014120500000) ". Replace components if necessary.

Scheme 14

Check Valve Vacuum Inspection

1. Check the vacuum using a suitable tool. When connected to the booster side: Refer to " «CHECK VALVE»(ref-675601-S30878864392014120500000) ". When connected to the vacuum hose side: Refer to " «CHECK VALVE»(ref-675601-S30878864392014120500000) ".
2. If the vacuum still cannot be maintained, replace the check valve.

Scheme 15

1. Loosen the lock nut (1) and adjust the input rod (2) to the specified length (A). Input rod length: Refer to " «BRAKE BOOSTER»(ref-675601-S13495273762014120500000) ".
2. Tighten the lock nut to the specified torque. Refer to " «EXPLODED VIEW»(ref-675601-S11266056412014120500000) ".

Inspect the brake booster operation. Refer to " INSPECTION ".

If any shim is subject to serious corrosion, replace it with a new one.

1. Check drag of front disc brake. If any drag is found, follow the procedure described below: Remove brake pads. Refer to " «BRAKE PAD: REMOVAL AND INSTALLATION»(ref-675601-S40401628342014120500000) ". Press the piston. Install brake pads. Refer to " «BRAKE PAD: REMOVAL AND INSTALLATION»(ref-675601-S40401628342014120500000) ". Securely depress the brake pedal several times. Check drag of front disc brake again. If any drag is found, disassemble the cylinder body and replace if necessary. Refer to " «BRAKE CALIPER ASSEMBLY: DISASSEMBLY AND ASSEMBLY»(ref-675601-S10004535372014120500000) ".
2. Burnish the brake pads and disc brake rotor mutually contacting surfaces, after refinishing or replacing disc brake rotors, after replacing brake pads, or if a soft pedal occurs at very low mileage. Refer to " «BRAKE PAD: BRAKE BURNISHING»(ref-675601-S37011113302014120500000) ".

Scheme 16

INSPECTION AFTER DISASSEMBLY

Brake Caliper

Check the inner wall of brake caliper for corrosion, wear, and damage. Replace as necessary.

Torque Member

Check torque member for wear, cracks, and damage. Replace as necessary.

Piston

Check the piston surface for corrosion, wear, and damage. Replace as necessary.

Sliding Pins, Sliding Pin Bolts, Sliding Pin Boot

Check the sliding pins, sliding pin bolts, and sliding pin boots for wear, damage, and cracks. Replace as necessary.

Scheme 17

Scheme 18

Scheme 19

Scheme 20

Scheme 21

1. Install bleeder valve and cap.
2. Apply clean brake fluid to new piston seal (1), and install to groove in cylinder body. CAUTION: Do not reuse piston seal.
3. Apply Syntheso® GLK 1 grease or equivalent to piston boot (1). Cover the piston (2) end with new piston boot, and then install cylinder side lip on piston boot securely into a groove on cylinder body. CAUTION: Do not reuse piston boot.
4. Push piston (1) into cylinder body by hand and push piston boot (2) piston-side lip into the piston groove. CAUTION: Press the piston evenly and vary the pressing point to prevent cylinder inner wall from being rubbed.
5. Apply rubber grease to the mating surfaces (A) of the sliding pin (1) and the bushing (2).
6. Install the bushing to the sliding pin.
7. Apply rubber grease to the mating surfaces of the sliding pins (1) and the sliding pin boots (2).
8. Install the sliding pins and sliding pin boots to the torque member (3).
9. Install the cylinder body to the torque member with the sliding pin bolts. Refer to " «BRAKE CALIPER ASSEMBLY: EXPLODED VIEW»(ref-675601-S13560409762014120500000) ".

Scheme 22

Check the following items and replace if necessary.

1. Check the brake shoe lining for excessive wear, damage, and peeling.
2. Check each spring for settling, excessive wear, damage, and rust.
3. Check the adjuster for smoothness, and check it for excessive wear, damage, and rust.
4. Check the back plate for damage, cracks, and deformation.
5. Check the wheel cylinder for cracks, damage, and leaks.
6. Visually check the brake drum for excessive wear, cracks, and damage.

Check the following items and replace if necessary.

1. Check the wheel cylinder inner wall for excessive wear, cracks, and damage.
2. Check the pistons for excessive wear and damage.

INSPECTION AFTER ASSEMBLY

Check that the pistons move smoothly.

1. Check that the drum brake component parts are installed properly.
2. Rotate the brake drum and check that there is no drag. Perform the following procedure if necessary: Remove the brake shoes. Refer to " «REMOVAL AND INSTALLATION»(ref-675601-S17306514672014120500000) ". Push the pistons. CAUTION: Push both side of the piston simultaneously. Install the brake shoes. Refer to " «REMOVAL AND INSTALLATION»(ref-675601-S17306514672014120500000) ".
3. Inspect and adjust the parking brake. Refer to " «INSPECTION AND ADJUSTMENT»(ref-675606-S41837027442014120500000) ".
4. Check drag of rear drum brake again. If any drag is found, disassemble the wheel cylinder and replace if necessary. Refer to " «DISASSEMBLY AND ASSEMBLY»(ref-675601-S03868158382014120500000) ".
5. Perform brake burnishing. Refer to " «BRAKE LINING: BRAKE BURNISHING»(ref-675601-S40019873832014120500000) ".