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Home >> Toyota >> 2022 >> Avalon XLE >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System (Hydraulic) (Service Information) >> BRAKE FLUID (for HV Model) >> Bleeding [04/2018 -] >> Caution / Notice / Hint

Caution / Notice / Hint

NOTE:
  • Perform air bleeding with the shift lever in P and the parking brake applied.
  • Perform air bleeding while maintaining the brake fluid level between the MAX and MIN lines on the brake fluid reservoir.
  • If the No. 1 brake actuator hose (the hose between the brake booster pump assembly and brake master cylinder reservoir assembly) is higher than the fluid level when the pump motor is operating, air will enter the hose and brake booster pump assembly and it may become difficult to perform air bleeding.
  • When performing air bleeding, the accumulator pressure drop may cause a buzzer to sound. As this is not a malfunction, continue with the air bleeding procedure.
  • If air bleeding is performed, a motor drive permission malfunction or accumulator low pressure DTC may be stored. Clear the DTCs after performing air bleeding or whenever specified by a procedure.
  • Make sure to release the parking brake before performing the linear solenoid valve offset learning and ABS holding solenoid valve learning.
  • Do not allow brake fluid to contact any painted surface. If brake fluid leaks onto any painted surface, immediately wash it off.
  • When performing air bleeding, do not continuously operate the pump motor for more than 100 seconds. If the pump motor is operated for more than 100 seconds, release the brake pedal to stop operation of the pump in order to prevent damage to the pump motor.
  • As brake fluid may overflow from the reservoir when brake fluid is released from the accumulator, do not invert and place the brake fluid bottle on the reservoir filler opening.
  • Do not use vacuum to bleed air from the brake system.

    HINT: 

    As the ECB (Electronically Controlled Brake system) contains complicated brake fluid passages, dissolved gases in the brake fluid may form bubbles as the brake fluid pressure decreases.

  • When bleeding air, select the suitable procedure according to the table below.
    Replaced/Installed Item Work Procedure
    Flexible hose (front/rear) Bleed brake line
    Disc brake cylinder assembly (front/rear)
    Brake booster pump assembly Bleed brake system
    Brake booster with master cylinder assembly
    Brake actuator assembly

HINT: 

There are 2 ways of brake line bleeding: using the Techstream or not using the Techstream.

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