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Home >> Lexus >> 2018 >> LC 500 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System (Hydraulic) - Service Information (Coupe) >> Brake Pedal >> Adjustment [03/2017 - 04/2020] >> Procedure

Adjustment [03/2017 - 04/2020]: Procedure

  1. INSPECT AND ADJUST BRAKE PEDAL HEIGHT 
    1. Remove the front door scuff plate LH.

      Refer to PROCEDURE - Step 10 [03/2017 - 06/2019] , or refer to PROCEDURE - Step 10 [06/2019 - 04/2020]

    2. Remove the front door opening trim cover LH.

      Refer to PROCEDURE - Step 12 [03/2017 - 06/2019] , or refer to PROCEDURE - Step 12 [06/2019 - 04/2020]

    3. Remove the front door No. 2 opening trim cover LH.

      Refer to PROCEDURE - Step 14 [03/2017 - 06/2019] , or refer to PROCEDURE - Step 14 [06/2019 - 04/2020]

    4. Remove the No. 1 instrument panel under cover sub-assembly.

      Refer to PROCEDURE - Step 16 [03/2017 - 06/2019] , or refer to PROCEDURE - Step 16 [06/2019 - 04/2020]

    5. Check the brake pedal height.

      HINT: 

      Inspect and adjust the brake pedal height with the floor carpet folded back.

      1. Measure the shortest distance between the brake pedal pad surface and front floor footrest as shown in the illustration.
        GTY790557Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *1 Brake Pedal Pad - -
        *a Brake Pedal Height *b Measuring Plane of Front Floor Footrest
        *c 30 mm (1.18 in.) - -

        Brake Pedal Height from Front Floor Footrest

        193.7 to 203.7 mm (7.63 to 8.01 in.)

        If the brake pedal height is not as specified, inspect and adjust the push rod length according to the procedure below.

    6. Adjust the push rod length.
      1. w/ VGRS:

        Remove the steering actuator assembly.

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

      2. w/o VGRS:

        Remove the No. 2 steering intermediate shaft assembly.

        Refer to REMOVAL [03/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 05/2023]

      3. Remove the stop light switch assembly.
        GTY798014Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *1 Lock Nut
        *2 Stop Light Switch Assembly
        *a Brake Pedal Height

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

      4. Loosen the lock nut and adjust the brake pedal height by turning the push rod to achieve the correct height.

        Brake Pedal Height from Front Floor Footrest

        193.7 to 203.7 mm (7.63 to 8.01 in.)

      5. Tighten the lock nut.

        Torque: 26 N.m (265 kgf/cm, 19 ft.lbf) 

      6. Install the stop light switch assembly.

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

      7. w/ VGRS:

        Install the steering actuator assembly.

        Refer to INSTALLATION [03/2017 - ]

      8. w/o VGRS:

        Install the No. 2 steering intermediate shaft assembly.

        Refer to INSTALLATION [03/2017 - 09/2018] , or refer to INSTALLATION [09/2018 - 05/2023]

    7. Install the No. 1 instrument panel under cover sub-assembly.

      Refer to PROCEDURE - Step 30 [03/2017 - 06/2019] , or refer to PROCEDURE - Step 30 [06/2019 - 04/2020]

    8. Install the front door No. 2 opening trim cover LH.

      Refer to PROCEDURE - Step 31 [03/2017 - 06/2019] , or refer to PROCEDURE - Step 31 [06/2019 - 04/2020]

    9. Install the front door opening trim cover LH.

      Refer to PROCEDURE - Step 33 [03/2017 - 06/2019] , or refer to PROCEDURE - Step 33 [06/2019 - 04/2020]

    10. Install the front door scuff plate LH.

      Refer to PROCEDURE - Step 35 [03/2017 - 06/2019] , or refer to PROCEDURE - Step 35 [06/2019 - 04/2020]

  2. INSPECT AND ADJUST BRAKE PEDAL STROKE SENSOR ASSEMBLY 
    1. Inspect the brake pedal stroke sensor assembly.
      1. Connect the Techstream to the DLC3 with the engine switch off.
      2. Turn the engine switch on (IG).
      3. Turn the Techstream on and enter the following menus: Chassis / ABS/VSC/TRAC / Data List / Stroke Sensor.

        Chassis > ABS/VSC/TRAC > Data List 

        Tester Display
        Stroke Sensor
      4. Read the stroke sensor value without the brake pedal depressed.

        Standard Voltage (without the brake pedal depressed)

        0.8 to 1.2 V

        If the stroke sensor value is not within the standard voltage, adjust the brake pedal stroke sensor assembly.

    2. Adjust the brake pedal stroke sensor assembly.
      1. w/ VGRS:

        Remove the steering actuator assembly.

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

      2. Loosen the 2 nuts.
        GTY830349Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        NOTE:

        Do not depress the brake pedal after turning the engine switch on (IG).

      3. Read the stroke sensor value in the Data List, and turn the brake pedal stroke sensor assembly slowly to the right or left to adjust the output voltage so that it is within the following range.
        GTY789152Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard Voltage (without the brake pedal depressed)

        0.8 to 1.2 V

      4. Tighten the 2 nuts.

        Torque: 8.5 N.m (87 kgf/cm, 75 in.lbf) 

      5. w/ VGRS:

        Install the steering actuator assembly.

        Refer to INSTALLATION [03/2017 - ]

      6. Perform initialization and calibration of the linear solenoid valve.

        Refer to INITIALIZATION [03/2017 - ]

      7. Turn the Techstream off and turn the engine switch off.
      8. Disconnect the Techstream.
  3. INSPECT BRAKE PEDAL FREE PLAY 
    1. Depress the brake pedal until a slight resistance is felt. Measure the distance as shown in the illustration.
      GTY434038Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Brake Pedal Free Play

      Brake Pedal Free Play

      1.0 to 6.0 mm (0.0394 to 0.236 in.)

      If the brake pedal free play is not as specified, check the stop light switch clearance.

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

      If the brake pedal free play is as specified, proceed to the Inspect Brake Pedal Reserve Distance procedure.

  4. INSPECT BRAKE PEDAL RESERVE DISTANCE 
    1. With the engine switch on (READY), depress the brake pedal and measure the brake pedal reserve distance as shown in the illustration.
      GTY790557Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Brake Pedal Pad - -
      *a Brake Pedal Reserve Distance *b Measuring Plane of Front Floor Footrest
      *c 30 mm (1.18 in.) - -

      Brake Pedal Reserve Distance from Front Floor Footrest at 490 N (50 kgf, 110.2 lbf)

      132 mm (5.20 in.) or more

      If the distance is not as specified, troubleshoot the brake system.

      Refer to PROBLEM SYMPTOMS TABLE [03/2017 - ]

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