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Nissan Leaf. Manual - part 293

BRAKE FLUID

BR-493

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BRAKE FLUID

Inspection

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CHECK BRAKE FLUID LEVEL

• Check that the brake fluid level in the reservoir tank is within the standard (between MAX – MIN lines).

• Visually check around the reservoir tank for brake fluid leakage.

• If the brake fluid level is extremely low (below the MIN line), check the amount of brake fluid and check for

brake fluid leaks in the brake system.

• Check for dirt or other foreign material inside the reservoir tank, and check that no oil other than the desig-

nated brake fluid has entered the system.

BRAKE PIPING

1. Check for cracking and damage to brake piping (tubes and hoses). If any abnormality is found, replace

the pipe.

2. With the vehicle in READY state, depress the brake pedal with a

force of 785 N (80 kg) and hold down the pedal for approxi-

mately 5 seconds. Check for any brake fluid leakage.

CAUTION:

If brake fluid leakage has occurred, retighten all parts to the

specified torque. If any abnormalities are found, replace the

part.

Draining

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CAUTION:

• Never allow brake fluid to contact the body or other painted surfaces. Brake fluid may damage paint.

If it contacts a painted surface, wipe it off immediately and wash with water. However avoid washing

brake components with water.

• Before performing work, turn the power switch OFF to exit CONSULT. Close all doors (including

back door), check that the room lamp is OFF, get out of the vehicle, and wait for 3 minutes or more

with all doors closed. Disconnect the electrically-driven intelligent brake unit, the ABS actuator con-

trol unit harness connector or disconnect the 12V battery cable from the negative terminal. Refer to

BR-6, "Precaution for Removing 12V Battery"

- Never operate the vehicle and CONSULT while waiting.

• If brake fluid contacts the disc rotor or brake caliper assembly, wipe it off immediately.
1. Connect a vinyl tube to air bleeder.
2. Depress the brake pedal and loosen the air bleeder to gradually

discharge brake fluid.

Refilling

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CAUTION:

If brake fluid contacts the disc rotor or brake caliper assembly, wipe it off immediately.
1. Make sure that there is no foreign material in the reservoir tank, and refill with new brake fluid.

CAUTION:

• Never reuse drained brake fluid.

• Never allow any oils other than the designated brake fluid to enter the system.

SBR389C

BRA0007D

BR-494

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BRAKE FLUID

2. Loosen the air bleeder, 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 of the brake fluid is discharged. Then close the

air bleeder with the brake pedal depressed. Repeat the same work on each wheel.

3. Perform air bleeding.

BR-494, "Bleeding Brake System"

Bleeding Brake System

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CAUTION:

• Turn the power switch without depressing the brake pedal when performing the procedure.

• Monitor the brake fluid level in the reservoir tank while performing the air bleeding.

• Never allow brake fluid to contact the body or other painted surfaces. Brake fluid may damage paint.

If it contacts a painted surface, wipe it off immediately and wash with water. However avoid washing

brake components with water.

• If brake fluid contacts the disc rotor or brake caliper assembly, wipe it off immediately.
1. Make sure that there is no foreign material in the reservoir tank, and refill with new brake fluid.

CAUTION:

• Never reuse drained brake fluid.

• Never allow any oils other than the designated brake fluid to enter the system.

2. Connect a vinyl tube to the rear right wheel air bleeder.
3. Fully depress the brake pedal 4 to 5 times.
4. Loosen the air bleeder and bleed air with the brake pedal depressed, then quickly tighten the bleeder

valve.

5. Repeat steps 2 to 3 until all of the air is out of the brake line.
6. Tighten the air bleeder to the specified torque.

• Front disc brake: Refer to

BR-518, "BRAKE CALIPER ASSEMBLY : Exploded View"

• Rear disc brake: Refer to

BR-525, "BRAKE CALIPER ASSEMBLY : Exploded View"

7. Perform steps 2 to 6. Occasionally fill with the brake fluid in order to keep it in the reservoir tank to at least

half of the MAX line. Bleed air in the following order: rear right brake

→ front left brake → rear left brake →

front right brake.

8. Check that the brake fluid level in the reservoir tank is within the specified range after air bleeding.
9. Check the brake pedal items, and adjust if any are not within the standard values. Refer to

BR-490,

"Inspection and Adjustment"

ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT

BR-495

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ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT

Inspection

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Brake fluid leakage

Check for brake fluid leakage from the brake tube connections and the electrically-driven intelligent brake unit.

BR-496

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FRONT DISC BRAKE

FRONT DISC BRAKE

BRAKE PAD
BRAKE PAD : Inspection and Adjustment

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Brake pad wear inspection

Check the brake pad thickness from the inspection hole in the cylin-

der body. Use a scale to check if necessary.

ADJUSTMENT

If the brake pad is ground or replaced, or if there is an abnormal feel to the braking force, follow the procedure

below and perform break-in work.

CAUTION:

• Because the brake effectiveness is reduced, pay sufficient attention to the vehicle speed.

• Perform checks on a safe road and be careful of the traffic conditions.
1. Drive on straight and flat roads.
2. Stop the vehicle by depressing the brake pedal to generate braking force that stops the vehicle in 3 to 5

seconds.

3. Cool the brakes.
4. Repeat steps 1 to 3 until the abnormal feel in braking force disappears.

DISC ROTOR
DISC ROTOR : Inspection and Adjustment

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Visual inspection

Check surface of the disc rotor for uneven wear, cracks, and serious damage. Replace if necessary. Refer to

FAX-9, "Removal and Installation"

RUNOUT INSPECTION

1. Use the wheel nuts and fasten the disc rotor to the wheel hub assembly (minimum 2 positions).
2. Check axial end play of wheel hub assembly.

FAX-7, "Inspection"

3. Check runout using a dial indicator [at 10 mm (0.39 in) from

outer edge of disc rotor].