Toyota Yaris: Rear Brake / Inspection

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Brake / Brake (rear) / Rear Brake / Inspection

INSPECTION

PROCEDURE

1. INSPECT BRAKE CYLINDER AND PISTON

(a) Check the rear disc brake cylinder bore and rear disc brake piston for rust and scoring.

If necessary, replace the rear disc brake cylinder assembly and rear disc brake piston.

2. INSPECT PAD LINING THICKNESS

(a) Using a ruler, measure the rear disc brake pad lining thickness.

Standard Thickness:

9.8 mm (0.386 in.)

Minimum Thickness:

1.0 mm (0.0394 in.)

If a rear disc brake pad lining thickness is less than the minimum thickness, replace the rear disc brake pads.

HINT:

Be sure to check the rear disc thickness when replacing the rear disc brake pads with new ones.

3. INSPECT REAR DISC BRAKE ANTI-RATTLE SPRING

(a) Clean the rear disc brake anti-rattle spring and check it for deformation and cracks.

If necessary, replace the rear disc brake anti-rattle spring.

4. INSPECT DISC THICKNESS

(a) Using a micrometer, measure the rear disc thickness.

Standard Thickness:

18.0 mm (0.709 in.)

Minimum Thickness:

16.5 mm (0.650 in.)

If the rear disc thickness is less than the minimum thickness, replace the rear disc.

*a

Micrometer

5. INSPECT DISC RUNOUT

(a) Inspect the rear axle hub bearing looseness and rear axle hub runout.

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(b) Hold the rear disc, tighten the rear disc with the 5 hub nuts.

Torque:

103 N·m {1050 kgf·cm, 76 ft·lbf}

(c) Using a dial indicator, measure the disc runout 10 mm (0.394 in.) from the outer edge of the rear disc.

Maximum Disc Runout:

0.15 mm (0.00591 in.)

NOTICE:

Keep the magnet of the dial indicator away from the rear axle hub and bearing assembly and rear speed sensor.

If the runout exceeds the maximum value, change the installation position of the rear disc to minimize the runout. If the runout exceeds the maximum even when the installation position is changed, replace the rear disc.

*a

Dial Indicator

(d) Remove the 5 hub nuts and rear disc.

    Disassembly

    DISASSEMBLY PROCEDURE 1. REMOVE CYLINDER BOOT (a) Using a screwdriver with its tip wrapped with protective tape, remove the 2 cylinder boots from the rear disc brake cylinder...

    Reassembly

    REASSEMBLY PROCEDURE 1. TEMPORARILY TIGHTEN REAR DISC BRAKE BLEEDER PLUG (a) Temporarily tighten the rear disc brake bleeder plug to the rear disc brake cylinder...

    Other information:

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    Categories

    Liftgate/Trunk Lid

    WARNING

    Never allow a person to ride in the luggage compartment/trunk

    Allowing a person to ride in the luggage compartment/trunk is dangerous. The person in the luggage compartment/trunk could be seriously injured or killed during sudden braking or a collision.

    Do not drive with the liftgate/trunk lid open

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