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Home >> Lexus >> 2019 >> LS 500h AWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System (Rear) - Service Information >> REAR BRAKE (for 4-Pot Caliper) >> Removal [10/2020 - 11/2021] >> Procedure

Removal [10/2020 - 11/2021]: Procedure

  1. DISCONNECT BRAKE BOOSTER PUMP CONNECTOR (w/o Advanced Park) 

    Refer to PROCEDURE - Step 3

  2. DISABLE BRAKE CONTROL (w/ Advanced Park) 
    1. Wait 2 minutes after turning the ignition switch off to ensure that the skid control ECU is in sleep mode.
      NOTE:
      • When the brake pedal is depressed or the door courtesy switch is turned on even if the ignition switch is off, the brake control system activates. Therefore do not depress the brake pedal or open/close the doors until the reservoir level switch connector is disconnected.
      • Do not operate the electric parking brake switch assembly when the electric parking brake system is in rear brake pad replacement mode.
    2. Disconnect the connector from the brake master cylinder reservoir assembly
      GTY969347Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Return the brake master cylinder reservoir assembly to its original position.

      HINT: 

      Do this to prevent brake fluid leakage.

    4. Disconnect the cable from the negative (-) auxiliary battery terminal.

      Refer to REMOVAL [10/2020 - 11/2021]

    5. In order to prevent pressurized brake fluid in the accumulator from being applied to the brake calipers, depress the brake pedal 40 times or more to return the pressurized brake fluid in the accumulator back to the brake master cylinder reservoir assembly.
    6. Check that the brake pedal cannot be further depressed.
  3. REMOVE REAR WHEEL 

    Refer to REMOVAL [10/2017 - 10/2023]

  4. DRAIN BRAKE FLUID 
    NOTE:

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

  5. REMOVE REAR DISC BRAKE PAD 

    Refer to PROCEDURE - Step 5

  6. REMOVE REAR DISC BRAKE ANTI-SQUEAL SHIM 

    Refer to PROCEDURE - Step 6

  7. DISCONNECT REAR FLEXIBLE HOSE 
    1. Remove the union bolt and gasket, and disconnect the rear flexible hose from the rear disc brake cylinder assembly LH.
      GTY798661Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. REMOVE REAR DISC BRAKE CYLINDER ASSEMBLY LH 
    1. Remove the 2 bolts and rear disc brake cylinder assembly LH from the rear axle carrier sub-assembly LH.
      GTY798662Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. REMOVE PARKING BRAKE SHOE ADJUSTING HOLE PLUG 
    1. Remove the parking brake shoe adjusting hole plug from the rear disc LH.
  10. REMOVE REAR DISC LH 
    1. Put matchmarks on the rear disc LH and the rear axle hub and bearing assembly LH.
      GTY786852Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Matchmark

      HINT: 

      Not required when replacing the rear disc LH.

    2. Release the parking brake and remove the rear disc LH.

      HINT: 

      If the rear disc LH cannot be removed easily, use a screwdriver to turn the shoe adjuster as shown in the illustration in order to contract the parking brake shoes.

      GTY792377Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Contract
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