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BRAKE FLUID (w/ ECB): Bleeding

CAUTION: Bleeding without the intelligent tester may result in air remaining in the brake hydraulic system. As this can cause an accident, be sure to use the intelligent tester for air bleeding.
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 the pump motor operates while air remains inside the brake reservoir tube no.1 hose, the air will enter the actuator, resulting in difficulty in bleeding. Keep the 2 ABS motor relays removed until instructed to reinstall them to prevent air from entering the brake reservoir tube no.1 hose.
  • The actuator pump motor and solenoid can be operated by the driver even if the engine switch is off.
  • Although a buzzer may sound due to declined accumulator pressure during bleeding, keep on bleeding.
  • DTCs indicating a malfunction in the ABS motor relay or pressure sensor are stored after bleeding. Clear the DTCs when instructed during or after bleeding.

Work list 

WORK LIST

Item Work procedure
Brake fluid(replacement) (1)(2)
  1. Disable brake control (ECB).
  2. Bleed the front brake system.
  3. Bleed the rear brake system.
Brake master cylinder and stroke simulator (replacement) (1)(2)
  1. Perform accumulator zero down. (before replacement).
  2. Disable brake control (ECB). (remove motor relay ) (before replacement)
  3. Bleed the brake reservoir tube No.1 hose.
  4. Bleed the front brake system.
  5. Bleed the rear brake system.
  6. Perform accumulator zero down.
Brake actuator (replacement) (1)
  1. Perform accumulator zero down. (before replacement).
  2. Disable brake control (ECB). (remove motor relay ) (before replacement)
  3. Bleed the brake reservoir tube No.1 hose.
  4. Bleed the front brake system.
  5. Bleed the rear brake system.
  6. Perform accumulator zero down.
Front brake (removal, installation, and disassembly) (1)
  1. Disable brake control (ECB). (removal, installation, and disassembly)
  2. Bleed the front brake system.
Rear brake (removal, installation, and disassembly) (1)
  1. Disable brake control (ECB). (removal, installation, and disassembly)
  2. Bleed the rear brake system.
  • (1) The listed order must be followed.
  • (2) If air enters the brake reservoir tube No.1 hose due to declined brake fluid level, be sure to bleed the brake reservoir tube No.1 hose.

HINT:

Refer to the intelligent tester operator's manual for further details.

  1. DISABLE BRAKE CONTROL 
    1. Move the shift lever to the P position and apply the parking brake.
    2. Connect the intelligent tester to the DLC3 with the engine switch off.
      Fig 1: Connecting Intelligent Tester To DLC3
      G04025292Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the 2 ABS motor relays with the engine room relays from No.3 block.
      Fig 2: Identifying ABS Motor Relays With Engine Room Relays From No. 3 Block
      G04025293Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Turn the engine switch on (IG).
      NOTE: Do not start the engine.
    5. Turn the intelligent tester on and select "DIAGNOSTIC MENU" --> "ABS/VSC" --> "ECB UTILITY" --> "ECB INVALID".
  2. ADD RESERVOIR WITH BRAKE FLUID 
    NOTE:
    • If brake fluid leaks onto any painted surface, wash or otherwise remove it completely
    • Do not place the fluid can on the reservoir inlet because brake fluid may overflow.
    1. Add brake fluid into the reservoir.

      Fluid: 

      SAE J1703 or FMVSS No. 116 DOT3 

      Fig 3: Filling Brake Fluid Into Reservoir
      G04025294Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. BLEED BRAKE RESERVOIR TUBE No.1 HOSE 
    1. Connect SST to the reservoir with the brake reservoir pressure adapter.

      SST 09992-00242, 09992-00350 

    2. Connect the vinyl tube to the bleeder plug of the actuator.
    3. Loosen the bleeder plug of the actuator.
    4. Use the SST to boost the pressure in the reservoir.

      Standard: 

      50 to 80 kPa (0.5 to 0.8 kgf/cm 2  , 7.3 to 11.6 psi) 

    5. Drain approximately 100 cc of fluid.
    6. Tighten the bleeder plug and boost the pressure in the reservoir again. Then loosen the bleeder plug to bleed air.
      NOTE: Repeat the above procedures 5 times or more.
      Fig 4: Connecting SST To Reservoir With Brake Reservoir Pressure Adapter
      G04025295Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. When air is completely bled from the hose between the reservoir and the actuator, tighten the bleeder plug.

      SST 09023-00101 

      Torque: 8.3 N*m (85 kgf*cm, 74 in.*lbf) 

  4. BLEED MASTER CYLINDER 
    NOTE: If the master cylinder has been disassembled or if the reservoir becomes empty, bleed the air from the master cylinder.
    1. Disconnect the brake lines from the master cylinder.
    2. Slowly depress and hold the brake pedal.
      Fig 5: Depressing Brake Pedal
      G04025296Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Cover the outer holes with fingers, and release the brake pedal.
    4. Repeat (b) and (c) 3 or 4 times.
      Fig 6: Releasing Brake Pedal
      G04025297Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Connect the brake lines to the master cylinder.

      SST 09023-00101 

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

  5. BLEED FRONT BRAKE SYSTEM 
    NOTE: Bleed the air from the wheel furthest from the master cylinder.
    1. Connect the vinyl tube to the bleeder plug.
    2. Depress the brake pedal several times, then loosen the bleeder plug with the pedal depressed.
      Fig 7: Depressing Brake Pedal
      G04025298Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. When fluid stops coming out, tighten the bleeder plug, then release the brake pedal.
    4. Repeat (b) and (c) 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 (112 kgf*cm, 8 ft.*lbf) 

    6. Repeat the above procedures for other wheel to bleed the air from the brake line.
      Fig 8: Tightening Bleeder Plug
      G04025299Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. BLEED REAR BRAKE SYSTEM 
    NOTE: Bleed the air by following the steps displayed on the intelligent tester.
    1. Turn the engine switch off.
    2. Install the 2 ABS motor relays to the engine room relay block No.3.
      NOTE: Install ABS motor relays before bleeding the air from the rear brake system.
    3. Turn the engine switch on (IG) and turn the intelligent tester on.
    4. Cancel "DISABLE BRAKE CONTROL" on the intelligent tester.

      HINT:

      If the brake control has been disabled brake control.

    5. Clear the DTC.
    6. Turn the intelligent tester on and select "DIAGNOSTIC MENU" --> "ABS/VSC" --> "ECB UTILITY" --> "ECB INVALID".
    7. With the brake pedal depressed, bleed the bleeder plug on the rear disc brake cylinder LH.
      NOTE: Keep the fluid inside the reservoir above the LOW level by replenishing.

      HINT:

      • Depress and hold the brake pedal.
      • After the solenoid operates for approximately 30 seconds, release the brake pedal to stop the solenoid
      • Repeat the procedures until air is completely bled from the rear brake system.
      • The ECB warning light comes on and the buzzer sound while bleeding, but they do not indicate a malfunction.
    8. Tighten the bleeder plug after bleeding.

      SST 09023-00101 

      Torque: 11 N*m (112 kgf*cm, 8.0 ft.*lbf) 

    9. With the brake pedal depressed, bleed the bleeder plug on the rear disc brake cylinder RH.
      NOTE: Keep the fluid inside the reservoir above the LOW level by replenishing.

      HINT:

      • Depress and hold the brake pedal.
      • After the solenoid operates for approximately 30 seconds, release the brake pedal to stop the solenoid.
      • Repeat the procedures until air is completely bled from the rear brake system.
      • The ECB warning light comes on and the buzzer sound while bleeding, but they do not indicate a malfunction.
    10. Tighten the bleeder plug after bleeding.

      Torque: 11 N*m (112 kgf*cm, 8.0 ft.*lbf) 

      SST 09023-00101 

    11. Cancel "DISABLE BRAKE CONTROL" on the intelligent tester.
  7. PERFORM ACCUMULATOR ZERO DOWN 
    CAUTION:
    • Be sure to perform this procedure before removal of the actuator.
    NOTE: Perform accumulator zero down by following the steps displayed on the intelligent tester.
    1. Connect the intelligent tester to the DLC3 with the engine switch off
    2. Turn the intelligent tester on and repeat the following steps 5 times.
      1. Turn the engine switch on (IG).
      2. Turn the intelligent tester on and select "DIAGNOSTIC MENU" --> "ABS/VSC" --> "ECB UTILITY" --> "ZERO DOWN" on the intelligent tester.
      3. When the buzzer sounds, turn the engine switch off.
        NOTE: Keep the fluid inside the reservoir above the LOW level by replenishing.

        HINT:

        • Accumulator pressure is released and accumulated repeatedly, which circulates the fluid inside the accumulator zero down (accumulator depressurizing).
        • The pump motor rotates and accumulator is pressurized every time the engine switch is turned from off to on (IG).
  8. CHECK BRAKE FLUID LEVEL 
    1. After performing accumulator zero down (accumulator depressurizing), adjust the fluid level in the master cylinder reservoir to the MAX level.

      HINT:

      • After performing accumulator zero down (accumulator depressurizing), fluid is built up in the accumulator by turning the engine switch on (IG) and the fluid level lowers.
  9. CLEAR DTC 
  10. PERFORM LINER VALVE OFFSET LEARNING 
    1. When the brake actuator assembly is replaced, perform linear valve offset learning. (See INITIALIZATION )
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