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Home >> Lexus >> 2021 >> LC 500 2D Convertible >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control System - Service Information (Convertible) >> Brake Actuator >> Removal [07/2020 - 05/2023] >> Procedure

Removal [07/2020 - 05/2023]: Procedure

  1. PRECAUTION 
    NOTE:

    After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal.

    Refer to PRECAUTION [07/2020 - ]

  2. DISCONNECT BRAKE BOOSTER PUMP CONNECTOR 
    1. With the engine switch off, disconnect the 2 brake booster pump connectors.
      GTY827554Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. PERFORM ACCUMULATOR PRESSURE ZERO DOWN 
    1. Drain the brake fluid in the brake master cylinder reservoir assembly to near the MIN line.
      GTY811813Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a MIN Line
    2. Connect the Techstream to the DLC3 with the engine switch off.
    3. Check that the parking brake is applied, and turn the engine switch on (IG).
    4. Turn the Techstream on and enter the following menus: Chassis / ABS/VSC/TRAC / Utility / ECB (Electronically Controlled Brake System) Utility / Zero Down.

      Chassis > ABS/VSC/TRAC > Utility 

      Tester Display
      ECB Utility

      HINT: 

      Using the Techstream to perform accumulator pressure zero down causes the pressurized brake fluid in the accumulator to be returned to the brake master cylinder reservoir assembly.

    5. When the buzzer sounds, turn the engine switch off.
    6. Turn the Techstream off and disconnect the Techstream from the DLC3.
  4. DRAIN BRAKE FLUID 
    NOTE:

    If brake fluid leaks onto any painted surface, immediately wash it off.

  5. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 

    Refer to REMOVAL [07/2020 - 05/2023]

    NOTE:

    When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

    Refer to INITIALIZATION [07/2020 - 05/2023]

  6. REMOVE FENDER APRON BRACE SUB-ASSEMBLY LH 

    Refer to PROCEDURE - Step 26

  7. DISCONNECT WIRE HARNESS 
    1. GTY836608Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Lock Lever Released
      Connector Disconnected

      Release the lock lever and disconnect the brake actuator connector from the brake actuator assembly.

    2. Detach the 2 clamps from the brake actuator bracket assembly.
  8. DISCONNECT BRAKE TUBE 
    1. GTY791212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a From Brake Stroke Simulator Cylinder Sub-assembly
      *b From Brake Master Cylinder Sub-assembly
      *c To Rear Wheel Cylinder Assembly RH
      *d To Rear Wheel Cylinder Assembly LH
      *e To Front Wheel Cylinder Assembly RH

      Use tags or make a memo to identify the places to reconnect the brake tubes.

    2. Using a union nut wrench, disconnect the 10 brake tubes.
      GTY775000Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Do not kink or damage the brake tube.
      • Do not allow any foreign matter such as dirt or dust to enter the brake tube from the connecting parts.
    3. GTY827253Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Remove the bolt and disconnect the No. 2 brake actuator tube clamp.

  9. REMOVE BRAKE TUBE 
    1. GTY775002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Detach the 3 clamps and disconnect the 3 upper side brake tubes from the brake tube clamp.

    2. GTY775004Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Remove the 3 lower side brake tubes with the brake tube clamp attached.

    3. GTY775005Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Detach the 3 clamps and disconnect the 3 brake tubes from the brake tube clamp.

  10. REMOVE BRAKE ACTUATOR WITH BRACKET 
    1. Slide the clip and disconnect the brake actuator hose from the brake master cylinder reservoir assembly.
      GTY774837Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the bolt, 2 nuts and brake actuator with bracket.
      NOTE:
      • Do not kink or damage the brake tubes.
      • Do not hold the brake actuator with bracket by the connector, hose or union.
      • Do not allow any foreign matter such as dirt or dust to enter the brake lines from the connecting parts.
  11. REMOVE BRAKE ACTUATOR HOSE 
    1. Slide the clip and disconnect the brake actuator hose from the brake actuator assembly.
      GTY774838Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. REMOVE NO. 3 BRAKE ACTUATOR TUBE 
    1. Using a union nut wrench, disconnect the No. 3 brake actuator tube from the brake actuator assembly.
      GTY827218Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Do not kink or damage the No. 3 brake actuator tube.
      • Do not allow any foreign matter such as dirt or dust to enter the No. 3 brake actuator tube from the connecting parts.
  13. REMOVE NO. 1 BRAKE ACTUATOR WAY 
    1. Remove the 2 bolts and No. 1 brake actuator way from the brake actuator assembly.
      GTY774839Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. REMOVE NO. 2 BRAKE ACTUATOR BRACKET 
    1. Remove the 3 nuts and No. 2 brake actuator bracket from the brake actuator assembly.
      GTY774840Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 3 brake actuator bracket spacers from the brake actuator bracket cushion.
      GTY774841Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the 3 brake actuator bracket cushions from the No. 2 brake actuator bracket.
  15. REMOVE NO. 1 BRAKE ACTUATOR BRACKET 
    1. Remove the 3 bolts and No. 1 brake actuator bracket from the brake actuator assembly.
      GTY774853Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. REMOVE NO. 3 BRAKE ACTUATOR BRACKET 
    1. Remove the 4 bolts and No. 3 brake actuator bracket from the body.
      GTY774854Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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