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Home >> Toyota >> 2021 >> 4Runner Limited, RWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System (Hydraulic) - Service Information >> BRAKE FLUID (for Vacuum Brake Booster) >> Replacement [08/2015 - 08/2019] >> Procedure

Replacement [08/2015 - 08/2019]: Procedure

  1. REPLACEMENT BRAKE FLUID 
    1. Remove the master cylinder reservoir filler cap assembly.
    2. Add brake fluid until the fluid level is between the MIN and MAX lines of the reservoir.
    3. Loosen the bleeder plug of the front disc brake cylinder RH.
    4. Repeatedly depress the brake pedal and bleed the air from the bleeder plug of the front disc brake cylinder RH.
      NOTE:

      Add fluid as necessary so that the fluid in the reservoir does not decrease below the MIN level.

    5. After air is completely bled out, tighten the bleeder plug while depressing the brake pedal.

      Torque: 11 N.m (110 kgf/cm, 8 ft.lbf) 

    6. Bleed the air from the bleeder plug of the front disc brake cylinder LH using the same procedure as for the RH side.
    7. Loosen the bleeder plug of the rear disc brake cylinder RH.
    8. Repeatedly depress the brake pedal and bleed the air from the bleeder plug of the rear disc brake cylinder RH.
      NOTE:

      Add fluid as necessary so that the fluid in the reservoir does not decrease below the MIN level.

    9. After air is completely bled out, tighten the bleeder plug while depressing the brake pedal.

      Torque: 11 N.m (110 kgf/cm, 8 ft.lbf) 

    10. Bleed the air from the bleeder plug of the rear disc brake cylinder LH using the same procedure as for the RH side.
    11. Inspect for brake fluid leaks.
    12. Inspect brake fluid level in reservoir (See step  1).
    13. Check and clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] for VSC).