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Home >> Lexus >> 2020 >> LC 500 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System (Hydraulic) - Service Information (Coupe) >> Brake Master Cylinder >> Removal [03/2017 - 05/2023] >> Procedure

Removal [03/2017 - 05/2023]: Procedure

  1. 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 [03/2017 - 05/2023]

  2. DISCONNECT BRAKE BOOSTER PUMP CONNECTOR 

    Refer to PROCEDURE - Step 2

  3. PERFORM ACCUMULATOR PRESSURE ZERO DOWN 

    Refer to PROCEDURE - Step 3

  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 [03/2017 - 05/2023]

  6. REMOVE BRAKE ACTUATOR WITH BRACKET 

    Refer to REMOVAL [03/2017 - 05/2023]

  7. DISCONNECT BRAKE TUBE 
    1. Using a union nut wrench, disconnect the brake tube flare nut.
      GTY789154Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. REMOVE LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY 

    Refer to REMOVAL [03/2017 - 05/2023]

  9. REMOVE NO. 2 AIR DUCT 

    Refer to PROCEDURE - Step 40 [03/2017 - 06/2019] , or refer to PROCEDURE - Step 40 [06/2019 - 04/2020] , or refer to PROCEDURE - Step 40 [04/2020 - 05/2023]

  10. REMOVE HEATER TO REGISTER CENTER SUB DUCT 

    Refer to PROCEDURE - Step 41 [03/2017 - 06/2019] , or refer to PROCEDURE - Step 41 [06/2019 - 04/2020] , or refer to PROCEDURE - Step 41 [04/2020 - 05/2023]

  11. REMOVE BRAKE PEDAL RETURN SPRING 

    See step  5 [03/2017 - 04/2020], or see step  5 [04/2020 - 05/2023]

  12. REMOVE STOP LIGHT SWITCH ASSEMBLY 

    Refer to REMOVAL [03/2017 - 05/2023]

  13. REMOVE PUSH ROD PIN 

    See step  8 [03/2017 - 04/2020], or see step  8 [04/2020 - 05/2023]

  14. REMOVE BRAKE MASTER WITH STROKE SIMULATOR CYLINDER ASSEMBLY 
    1. Remove the 4 nuts.
      GTY789156Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the brake fluid level warning switch connector.
      GTY789201Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Detach the wire harness clamp.

      HINT: 

      Disconnect the wire harness clamp after pulling out the brake master with simulator cylinder assembly a small amount.

    4. Remove the brake master with stroke simulator cylinder assembly.
      GTY789200Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Do not kink or damage the No. 2 brake actuator tube.
      • Protect the surface of the relay block so that it does not become damaged on the brake master with stroke simulator cylinder assembly.
  15. REMOVE BRAKE MASTER CYLINDER GASKET 
    1. Remove the brake master cylinder gasket from the brake master with stroke simulator cylinder assembly.
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