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Home >> Toyota >> 2019 >> Sienna SE, AWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System (Hydraulic) (Service Information) >> Brake Fluid >> Bleeding [12/2015 - ] >> Procedure

Bleeding [12/2015 - ]: Procedure

  1. REMOVE COWL TOP VENTILATOR LOUVER BRACKET RH 

    See step  1

  2. FILL RESERVOIR WITH BRAKE FLUID 

    See step  2

  3. BLEED BRAKE MASTER CYLINDER 
    NOTE:
    • If the master cylinder is reinstalled or runs out of brake fluid, bleed the master cylinder.
    • To prevent brake fluid from damaging painted surfaces, cover any surrounding parts with a piece of cloth.
    1. Using a union nut wrench (12 mm), disconnect the 2 brake lines from the master cylinder sub-assembly.
      GTY299092Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Slowly depress the brake pedal and hold it*1.
      GTY299090Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Cover the 2 outer holes with fingers, and release the brake pedal*2.
      GTY299091Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Repeat steps *1 and *2, 3 or 4 times.
    5. Using a union nut wrench (12 mm), connect the 2 brake lines to the master cylinder.
      GTY299092Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 20 N*m (199 kgf*cm, 14 ft.*lbf) 

      NOTE:

      Use the formula to calculate special torque values for situations where the union nut wrench is combined with a torque wrench (Refer to PRECAUTION [12/2015 - 08/2016] , or refer to PRECAUTION [08/2016 - ] ).

  4. BLEED BRAKE LINE 
    NOTE:
    • Bleed the brake line of the wheel farthest from the master cylinder first.
    • Add brake fluid to keep the level between the MIN and MAX lines of the reservoir while bleeding the brakes.
    • If brake fluid leaks onto any painted surface, immediately wash it off.
    1. Connect a vinyl tube to the bleeder plug.
    2. Depress the brake pedal several times, and then loosen the bleeder plug with the pedal depressed*1.
      GTY203920Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. When fluid stops coming out, tighten the bleeder plug, and then release the brake pedal*2.
      GTY203921Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Repeat *1 and *2 until all the air in the fluid is completely bled out.
    5. Tighten the bleeder plug completely.

      Front bleeder plug 

      Torque: 8.3 N*m (85 kgf*cm, 73 in.*lbf) 

      Rear bleeder plug 

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

    6. Repeat the above procedure for each wheel to bleed the brake line.
  5. BLEED BRAKE ACTUATOR 
    NOTE:

    After bleeding the air from the brake system, if the correct height or feel of the brake pedal cannot be obtained, bleed the air from the brake actuator assembly using the Techstream by following the procedure below.

    1. Depress the brake pedal more than 20 times with the ignition switch off.
    2. Connect the Techstream to the DLC3, then turn the ignition switch to ON.
      NOTE:

      Do not start the engine.

    3. Turn the Techstream on and enter the following menus: Chassis / ABS/VSC/TRAC / Utility / Air Bleeding.
    4. Bleed brake actuator following the instructions on the Techstream.
    5. After air bleeding, tighten each bleeder plug.

      Front bleeder plug 

      Torque: 8.3 N*m (85 kgf*cm, 73 in.*lbf) 

      Rear bleeder plug 

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

    6. Turn the Techstream off and disconnect the Techstream from the DLC3.
    7. Turn the ignition switch off.
  6. INSPECT FOR BRAKE FLUID LEAK 
  7. INSPECT FLUID LEVEL IN RESERVOIR 

    See step  1

  8. INSTALL COWL TOP VENTILATOR LOUVER BRACKET RH 

    See step  6

  9. CHECK AND CLEAR DTCS 

    (Refer to DTC CHECK / CLEAR [12/2015 - 11/2017] , or refer to DTC CHECK / CLEAR [11/2017 - ] )

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