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Home >> Lexus >> 2017 >> LS 460 Base, AWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control System - Service Information >> Brake Actuator >> Removal [09/2015 - ] >> Procedure

Removal [09/2015 - ]: Procedure

  1. REMOVE V-BANK COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 1

  2. REMOVE COWL TOP VENTILATOR LOUVER RH 

    Refer to PROCEDURE - Step 2

  3. REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

  4. DISCONNECT BRAKE ACCUMULATOR PUMP CONNECTOR 

    Refer to PROCEDURE - Step 3

  5. PERFORM ACCUMULATOR PRESSURE ZERO DOWN 

    Refer to PROCEDURE - Step 4

  6. PRECAUTION 
    NOTE:

    After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Refer to PRECAUTION [09/2015 - ] ).

  7. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    NOTE:

    When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Refer to INITIALIZATION [09/2015 - ] ).

  8. REMOVE SKID CONTROL ECU 

    (See step  6)

  9. REMOVE SKID CONTROL ECU BRACKET 

    (See step  7)

  10. DISCONNECT NO. 3 RELAY BLOCK 
    1. While pushing the claw of the No. 3 relay block, pull out the No. 3 relay block and disconnect it from the reservoir bracket.
      GTY613938Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Do not allow brake fluid to contact the No. 3 relay block.

  11. REMOVE BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY 

    Refer to PROCEDURE - Step 11

  12. REMOVE NO. 1 RESERVOIR HOSE 

    Refer to PROCEDURE - Step 12

  13. REMOVE RESERVOIR BRACKET 

    Refer to PROCEDURE - Step 13

  14. REMOVE FRONT WHEEL 
  15. DISCONNECT BRAKE TUBE 
    1. Using a union nut wrench, disconnect the 6 brake tubes from the actuator.
      GTY623387Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Use tags or make a note to identify the reconnection locations.
      GTY680359Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • *1: To FR RH
      • *2: To FR LH
      • *3: To: RR RH
      • *4: To RR LH
      • *5: From Master Cylinder
      • *6: From Stroke Simulator
    3. Using a union nut wrench, disconnect the No. 1 (labeled A) and No. 2 (labeled B) brake actuator tubes.
      GTY629365Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Do not damage the No. 1 and No. 2 brake actuator tubes.

  16. REMOVE BRAKE ACTUATOR AND BRAKE ACCUMULATOR PUMP ASSEMBLY 
    1. Release the lock lever and disconnect the brake actuator connector.
      NOTE:

      Do not allow brake fluid to contact the connector face.

      GTY111034Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the No. 1 brake actuator hose from the clamp and then remove the clamp.
      GTY685964Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the front fender liner rear side and then remove the 2 nuts (labeled A).
      GTY289192Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the bolt (labeled B) and brake actuator and brake accumulator pump.
      NOTE:
      • Do not damage the brake tubes.
      • When removing the brake actuator and brake accumulator pump from the vehicle, do not hold the connector, harness, hose or tube parts.
      • Do not drop the brake actuator and brake accumulator pump. Do not use parts that have been dropped.
  17. REMOVE NO. 5 BRAKE ACTUATOR BRACKET 
    1. Remove the bolt and No. 5 brake actuator bracket.
      GTY674098Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  18. REMOVE NO. 1 BRAKE ACTUATOR HOSE 
    NOTE:

    When disconnecting the hose, be careful that there is no excessive weight applied to the union of the brake actuator (especially in the union rotation direction).

    1. Remove the hose clip and the No. 1 brake actuator hose.
      GTY253841Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  19. REMOVE BRAKE ACTUATOR PROTECTOR 
    1. Remove the protector.
      GTY685722Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  20. REMOVE NO. 2 BRAKE ACTUATOR HOSE 
    NOTE:

    When disconnecting the hose, be careful that there is no excessive weight applied to the union of the brake accumulator pump (especially in the union rotation direction).

    1. Disconnect the No. 2 brake actuator hose from the No. 3 brake actuator bracket and then remove the clamp.
      GTY111039Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the hose clip and No. 2 brake actuator hose.
    3. Remove the hose clip and reservoir connector.
      GTY110822Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  21. REMOVE NO. 3 BRAKE ACTUATOR TUBE 
    NOTE:
    • Do not damage the No. 3 brake actuator tube, brake actuator and brake accumulator pump.
    • When removing the No. 3 brake actuator tube, hold the tube, brake actuator and brake accumulator pump securely.
    1. Using a union nut wrench, disconnect the No. 3 brake actuator tube.
      GTY623389Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  22. DISCONNECT BRAKE ACCUMULATOR PUMP CONNECTOR BOX 
    1. Disconnect the brake accumulator pump connector box as follows:
      GTY637550Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Connector Box
      1. Detach the wiring harness clamp (labeled A).
      2. Remove the nut (labeled B) and connector box.
  23. REMOVE NO. 4 BRAKE ACTUATOR BRACKET 
    1. Remove the bolt and No. 4 brake actuator bracket.
      GTY679518Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  24. REMOVE BRAKE ACCUMULATOR PUMP 
    1. Break and remove the brake actuator bracket clamp (labeled A), and then remove the brake accumulator pump.
      GTY656624Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the brake booster pump bush (labeled B) from the brake actuator bracket.
      GTY397961Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Brake Accumulator Pump
      *2 Clamp (A)
      *3 Bush (B)
    3. Remove the brake booster pump bush (labeled C) and brake booster pump collar (labeled D) from the brake accumulator pump.
  25. REMOVE BRAKE ACTUATOR 
    1. Remove the 3 bolts, brake actuator bracket and brake actuator.
      GTY679517Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 3 cushions and 3 spacers from the brake actuator bracket.
      GTY672890Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Cushion
      *2 Spacer
    3. Remove the 3 bolts and No. 3 brake actuator bracket from the brake actuator.
      GTY121070Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002