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Brake Fluid: Bleeding: Bleeding

WARNING: This page is about a different car, the 2009 Lexus IS 350 and 2009 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

HINT: 

If any work is performed on the brake system or if air in the brake lines is suspected, bleed the air from the brake system.

NOTE:
  • Move the shift lever to the P position and apply the parking brake before bleeding the brakes.
  • Add brake fluid to keep the level between MIN and MAX lines of the reservoir while bleeding the brakes.
  • If brake fluid leaks onto any painted surface, wash off or remove the brake fluid completely.


  1. ADD RESERVOIR WITH BRAKE FLUID 
    1. Add reservoir with brake fluid.
      Fig 1: Identifying Reservoir With Brake Fluid
      GTY132276Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Fluid

      SAE J1703 or FMVSS No. 116 DOT3

  2. BLEED MASTER CYLINDER 

    HINT: 

    • If the master cylinder is reinstalled or if the reservoir becomes empty, bleed the air from the master cylinder.
    • To prevent paint damage due to brake fluid, cover the painted surface with a shop rag or a piece of cloth.
    1. Using a union nut wrench (10 mm), disconnect the 2 brake lines from the master cylinder.
      Fig 2: Disconnecting Brake Lines From Master Cylinder Using Union Nut Wrench
      GTY133556Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Slowly depress the brake pedal and hold it *1.
      Fig 3: Slowly Depressing Brake Pedal
      GTY135285Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Cover the 2 outer holes with fingers, and release the brake pedal *2.
      Fig 4: Covering Holes With Fingers & Releasing Brake Pedal
      GTY135286Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Repeat *1 and *2 steps 3 or 4 times.
    5. Using a union nut wrench (10 mm), connect the brake lines to the master cylinder.
      Fig 5: Connecting Brake Lines To Master Cylinder
      GTY135874Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      without a union nut wrench 

      Torque: 15 N*m ( 155 kgf*cm, 11 ft.*lbf) 

      with a union nut wrench 

      Torque: 14 N*m ( 143 kgf*cm, 10 ft.*lbf) 

      NOTE:
      • Use a torque wrench with a fulcrum length of 250 mm (9.84 in.).
      • This torque value is effective when the union nut wrench is parallel to the torque wrench.
      • Do not kink or damage the brake line.
      • Do not allow any foreign matter such as dirt or dust to enter the brake line.
  3. BLEED BRAKE LINE 
    NOTE:

    Bleed the brake line at the wheel furthest from the master cylinder.

    1. Connect the vinyl tube to the bleeder plug.
      Fig 6: Depressing Brake Pedal
      GTY108732Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Depress the brake pedal several times, then loosen the bleeder plug with the pedal depressed (*3).
    3. When fluid no longer comes out, tighten the bleeder plug, then release the brake pedal (*4).
      Fig 7: Bleeding Brakes
      GTY108733Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Repeat (*3) and (*4) until all the air in the fluid is completely bled out.
    5. Using SST, tighten the bleeder plug completely.
      • SST: 09023-00101 

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

    6. Repeat the above procedures for each wheel to bleed the air from the brake line.
  4. BLEED BRAKE ACTUATOR ASSEMBLY 
    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 with the Techstream by following the procedures below.

    1. Depress the brake pedal more than 20 times with the engine switch off.
    2. Connect the Techstream to the DLC3, then turn the engine switch on (IG).
      NOTE:

      Do not start the engine.

    3. Turn the Techstream on and select "AIR BLEEDING" on the screen.
      NOTE:
      • Refer to the Techstream operator's manual for further details.
      • Bleed the brake actuator assembly by following the steps displayed on the Techstream.
    4. Bleed the air from the actuator according to "Step 1: Increase" on the Techstream display.
      NOTE:

      Make sure that the master cylinder reservoir tank does not become empty of brake fluid.

      1. Connect a vinyl tube to either one of the bleeder plugs.
        Fig 8: Depressing Brake Pedal
        GTY108732Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Depress the brake pedal several times, then loosen the bleeder plug connected to the vinyl tube with the pedal depressed (*5).
      3. When fluid no longer comes out, tighten the bleeder plug, then release the brake pedal (*6).
        Fig 9: Bleeding Brakes
        GTY108733Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Repeat (*5) and (*6) until all the air in the fluid is completely bled.
      5. Using SST, tighten the bleeder plug completely.
        • SST: 09023-00101 

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

      6. Repeat the above procedures for the rest of the wheels to bleed the air from the brake lines.
    5. Bleed the air from the suction line according to "Step 2: Inhalation" on the Techstream display.
      NOTE:
      • Bleed the suction line by following the steps displayed on the Techstream.
      • Make sure that the master cylinder reservoir tank does not become empty of brake fluid.
      1. Connect a vinyl tube to the bleeder plug at the right front wheel or the right rear wheel and loosen the bleeder plug.
        Fig 10: Connecting Vinyl Tube To Bleeder Plug
        GTY103970Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Operate the brake actuator assembly to bleed the air using the Techstream (*7).
        NOTE:
        • The operation stops automatically in 4 seconds.
        • At this time, be sure to release the brake pedal.
      3. Check that the operation has stopped by referring to the Techstream display and tighten the bleeder plug (*8).
        Fig 11: Tightening Bleeder Plug
        GTY103969Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Repeat (*7) and (*8) until all the air in the fluid is completely bled out.
      5. Using SST, tighten the bleeder plug completely.
        • SST: 09023-00101 

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

      6. For the rest of the wheels, bleed the air in the same way as stated in the above procedures.
    6. Bleed the air from the pressure reduction line according to "Step 3: Decrease" on the Techstream display.
      NOTE:
      • Bleed the pressure reduction line by following the steps displayed on the Techstream.
      • Make sure that the master cylinder reservoir tank does not become empty of brake fluid.
      1. Connect a vinyl tube to either one of the bleeder plugs.
        Fig 12: Loosening Bleeder Plug And Depressing Brake Pedal
        GTY101306Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Loosen the bleeder plug (*9).
      3. Using the Techstream, operate the brake actuator assembly, completely depress the brake pedal and hold it.
        NOTE:
        • The operation stops automatically after 4 seconds. When this operation will be repeated continuously, allow an interval of at least 20 seconds between each bleeding operation.
        • When the operation is completed, the brake pedal will go down slightly. This is a normal phenomenon due to the opening of the solenoid.
        • During this procedure, the brake pedal will seem heavy. It is necessary to completely depress it, so that brake fluid will come out of the bleeder plug.
        • Be sure to keep the brake pedal depressed. Never depress and release the pedal repeatedly.
      4. Tighten the bleeder plug, then release the brake pedal (*10).
        Fig 13: Bleeding Brakes
        GTY108733Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      5. Repeat steps (*9) to (*10) until all the air in the fluid is completely bled out.
      6. Using SST, tighten the bleeder plug completely.
        • SST: 09023-00101 

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

      7. Repeat the above procedures for the rest of the brakes to bleed the air from the brake line.
    7. Bleed the air from the brake line again according to "Step 4: Increase" on the Techstream display.
      NOTE:
      • Bleed the brake line by following the steps displayed on the Techstream.
      • Make sure that the master cylinder reservoir tank does not become empty of brake fluid.
      1. Connect a vinyl tube to either one of the bleeder plugs.
        Fig 14: Depressing Brake Pedal
        GTY108732Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Depress the brake pedal several times, then loosen the bleeder plug connected to the vinyl tube with the pedal depressed (*11).
      3. When fluid no longer comes out, tighten the bleeder plug, then release the brake pedal (*12).
        Fig 15: Bleeding Brakes
        GTY108733Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Repeat (*11) and (*12) until all the air in the fluid is completely bled out.
      5. Using SST, tighten the bleeder plug completely.
        • SST: 09023-00101 

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

      6. Repeat the above procedures for each brake to bleed the air from the brake line.
    8. Finish "AIR BLEEDING" on the Techstream and turn the Techstream off.
    9. Disconnect the Techstream from the DLC3.
    10. Turn the engine switch off.
  5. INSPECT FLUID LEVEL IN RESERVOIR 
    1. Check the fluid level and add fluid if necessary.

      Fluid

      SAE J1703 or FMVSS No. 116 DOT3

      HINT: 

      If fluid leaks, tighten or replace the leaking part.

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