LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2012 >> LS 460 AWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control System (Service Information) >> Brake Actuator >> Removal >> Removal
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Brake Actuator: Removal: Removal

NOTE:

While the battery is connected, even if the engine switch is off, the brake control system activates when the brake pedal is depressed or the door courtesy switch turns on. Therefore during servicing of the brake system components, do not operate the brake pedal and open/close the doors while the battery is connected.

  1. REMOVE V-BANK COVER SUB-ASSEMBLY  . Refer to REMOVAL - Step 3
  2. REMOVE COWL TOP VENTILATOR LOUVER RH  . Refer to REMOVAL - Step 1
  3. REMOVE FRONT WIPER ARM LH  . Refer to REMOVAL - Step 3
  4. REMOVE FRONT WIPER ARM RH  . Refer to REMOVAL - Step 4
  5. REMOVE ENGINE ROOM SIDE COVER LH  . Refer to REMOVAL - Step 8
  6. REMOVE ENGINE ROOM SIDE COVER RH  . Refer to REMOVAL - Step 7
  7. REMOVE FRONT FENDER PROTECTOR UPPER LH  . Refer to REMOVAL - Step 7
  8. REMOVE FRONT FENDER PROTECTOR UPPER RH  . Refer to REMOVAL - Step 8
  9. REMOVE HOOD TO COWL TOP SEAL  . Refer to REMOVAL - Step 9
  10. REMOVE FRONT FENDER TO COWL SIDE SEAL LH  . Refer to REMOVAL - Step 10
  11. REMOVE FRONT FENDER TO COWL SIDE SEAL RH  . Refer to REMOVAL - Step 11
  12. REMOVE COWL TOP VENTILATOR LOUVER PROTECTOR LH  . Refer to REMOVAL - Step 12
  13. REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY  . Refer to REMOVAL - Step 13
  14. DISCONNECT BRAKE ACCUMULATOR PUMP CONNECTOR  . Refer to REPLACEMENT - Step 3
  15. PERFORM ACCUMULATOR PRESSURE ZERO DOWN  . Refer to REPLACEMENT - Step 4
  16. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    WARNING:

    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    NOTE:
    • w/ Navigation System (for HDD):

      After the engine switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the engine switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.

      Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal

      Condition Waiting Time
      Vehicle enrolled in safety connect system 6 minutes
      Vehicle not enrolled in safety connect system 1 minute
    • When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to INITIALIZATION .
  17. REMOVE SKID CONTROL ECU  See step  5
  18. REMOVE SKID CONTROL ECU BRACKET  See step  6
  19. 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.
      Fig 1: Pull Out The No. 3 Relay Block
      GTY280138Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

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

  20. REMOVE BRAKE FLUID RESERVOIR  . Refer to REMOVAL - Step 21
  21. REMOVE NO. 1 RESERVOIR HOSE  . Refer to REMOVAL - Step 22
  22. REMOVE RESERVOIR BRACKET  . Refer to REMOVAL - Step 23
  23. REMOVE FRONT WHEEL 
  24. DISCONNECT BRAKE TUBE 
    1. Using a union nut wrench, disconnect the 6 brake tubes from the actuator.
      Fig 2: Identifying Brake Tubes
      GTY277890Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Use tags or make a note to identify the reconnection locations.
      Fig 3: Make A Note To Identify The Reconnection Locations
      GTY258918Courtesy 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.
      Fig 4: Disconnect The No. 1 (Labeled A) And No. 2 (Labeled B) Brake Actuator Tubes
      GTY256236Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

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

  25. 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.

      Fig 5: Releasing Lock Lever
      GTY111034Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the No. 1 brake actuator hose from the clamp and then remove the clamp.
      Fig 6: Identifying No. 1 Brake Actuator Hose From Clamp
      GTY110937Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the front fender liner rear side and then remove the 2 nuts (labeled A).
      Fig 7: Locating Brake Actuator And Brake Accumulator Pump Nuts And Bolt
      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.
  26. REMOVE NO. 5 BRAKE ACTUATOR BRACKET 
    1. Remove the bolt and No. 5 brake actuator bracket.
      Fig 8: Identifying No. 5 Brake Actuator Bracket Bolt
      GTY111235Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  27. 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.
      Fig 9: Identifying No. 1 Brake Actuator Hose
      GTY253841Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  28. REMOVE BRAKE ACTUATOR PROTECTOR 
    1. Remove the protector.
      Fig 10: Locating Brake Actuator Protector
      GTY110588Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  29. 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.
      Fig 11: Identifying Brake Actuator Hose & Hose Clip
      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.
      Fig 12: Identifying Hose Clip And Reservoir Connector
      GTY289264Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  30. 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.
      Fig 13: No. 3 Brake Actuator Tube Connection Area
      GTY276556Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  31. DISCONNECT BRAKE ACCUMULATOR PUMP CONNECTOR BOX 
    1. Disconnect the brake accumulator pump connector box as follows:
      Fig 14: Identifying Brake Accumulator Pump Connector Box With Clamp And Nut
      GTY289026Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Detach the wiring harness clamp (labeled A).
      2. Remove the nut (labeled B) and connector box.
  32. REMOVE NO. 4 BRAKE ACTUATOR BRACKET 
    1. Remove the bolt and No. 4 brake actuator bracket.
      Fig 15: Identifying No. 4 Brake Actuator Bracket Bolt
      GTY111041Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  33. REMOVE BRAKE ACCUMULATOR PUMP 
    1. Break and remove the brake actuator bracket clamp (labeled A), and then remove the brake accumulator pump.
      Fig 16: Locating Brake Accumulator Pump Clamp
      GTY289195Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 17: Identifying Brake Booster Pump Bush And Clamp
      GTY289024Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the brake booster pump bush (labeled B) from the brake actuator bracket.
    3. Remove the brake booster pump bush (labeled C) and brake booster pump collar (labeled D) from the brake accumulator pump.
  34. REMOVE BRAKE ACTUATOR 
    1. Remove the 3 bolts, brake actuator bracket and brake actuator.
      Fig 18: Identifying Brake Actuator Bracket, Brake Actuator & Bolts
      GTY111042Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 3 cushions and 3 spacers from the brake actuator bracket.
      Fig 19: Identifying Brake Actuator Bracket Cushions And Spacers
      GTY283043Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the 3 bolts and No. 3 brake actuator bracket from the brake actuator.
      Fig 20: Identifying No. 3 Brake Actuator Bracket With Bolts
      GTY289197Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals