Brake Master Cylinder (W/ Vsc) Installation

Brake. Lexus Gs430, Gs300. Uzs190 Grs190
Brake. Lexus Gs430, Gs300. Uzs190 Grs190

  1. INSTALL BRAKE MASTER WITH PLATE CYLINDER SUB-ASSEMBLY

  2. INSTALL ENGINE ROOM RELAY NO.3 BLOCK

  3. FILL RESERVOIR WITH BRAKE FLUID

  4. BLEED MASTER CYLINDER

  5. BLEED BRAKE LINE

  6. BLEED ABS AND TRACTION ACTUATOR ASSEMBLY

  7. INSTALL FRONT WHEEL

  8. CHECK FLUID LEVEL IN RESERVOIR

  9. INSPECT BRAKE FLUID LEAKAGE

  10. CLEAR DTC

  11. CHECK VSC SENSOR SIGNAL

  12. CHECK ACTUATOR WITH INTELLIGENT TESTER

  13. INSTALL COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY

  14. INSTALL FRONT FENDER TO COWL SIDE SEAL LH

  15. INSTALL FRONT FENDER TO COWL SIDE SEAL RH

  16. INSTALL FRONT WIPER ARM AND BLADE ASSEMBLY LH

  17. INSTALL FRONT WIPER ARM AND BLADE ASSEMBLY RH

  18. INSTALL FRONT PILLAR TO FRONT SIDE SEAL SUB-ASSEMBLY LH

  19. INSTALL FRONT PILLAR TO FRONT SIDE SEAL SUB- ASSEMBLY RH

  20. INSTALL ENGINE ROOM SIDE COVER RH

  21. INSTALL ENGINE ROOM SIDE COVER LH

  22. INSTALL COOL AIR INTAKE DUCT SEAL

Brake Master Cylinder (W/ Vsc) -- Installation



1. INSTALL BRAKE MASTER WITH PLATE CYLINDER SUB-ASSEMBLY
  1. Install a new O-ring to the brake master cylinder sub-assembly.



    Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Install the brake master cylinder sub-assembly to the booster assembly with the 2 nuts.

    Torque:
    12.5 N*m{127 kgf*cm, 9 ft.*lbf}


    Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Using SST, connect the 2 brake tubes to the brake master cylinder sub-assembly.

    SST
    09023-00101
    Torque:
    15 N*m{155 kgf*cm, 11 ft.*lbf}
  1. Engage the clamp and connect the warning switch connector.



2. INSTALL ENGINE ROOM RELAY NO.3 BLOCK


    Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Install the relay block No.3 with the bolt and nut.

    Torque:
    12.5 N*m{127 kgf*cm, 9 ft.*lbf}


3. FILL RESERVOIR WITH BRAKE FLUID


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Fill reservoir with brake fluid.

    Fluid:
    SAE J1703 or FMVSS No. 116 DOT3


4. BLEED MASTER CYLINDER
HINT:
  1. If the master cylinder is reinstalled or if the reservoir becomes empty, bleed the air from the master cylinder.
  2. To avoid brake fluid from adhering, cover the painted surface with a shop rag or a piece of cloth.
  1. Disconnect the 2 brake lines from the master cylinder.



    Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Slowly depress the brake pedal and hold it.



    Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Cover the 2 outer holes with fingers, and release the brake pedal.

  1. Repeat (b) and (c) 3 or 4 times.

  1. Using SST, connect the brake lines to the master cylinder.

    SST
    09023-00101
    Torque:
    15 N*m{155 kgf*cm, 11 ft.*lbf}


5. BLEED BRAKE LINE
NOTICE:
Bleed the air from the wheel furthest from the master cylinder.
  1. Connect a vinyl tube to the bleeder plug.



    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Depress the brake pedal several times, then loosen the bleeder plug with the pedal depressed.



    Lexus Gs430, Gs300. Uzs190 Grs190
  1. When fluid stops coming out, tighten the bleeder plug, then release the brake pedal.

  1. Repeat (b) and (c) until all the air in the fluid is completely bled out.

  1. Using SST, tighten the bleeder plug completely.

    SST
    09023-00101
    Torque:
    11 N*m{112 kgf*cm, 8 ft.*lbf}
  1. Repeat the above procedures for each wheel to bleed the air from the brake line.



6. BLEED ABS AND TRACTION ACTUATOR ASSEMBLY
NOTICE:
After bleeding the air from the brake system, if the height or feel of the brake pedal cannot be obtained, bleed the air from the ABS and TRACTION actuator assembly with the intelligent tester by following the procedures below.
  1. Depress the brake pedal more than 20 times with the engine switch off.



    Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Connect the intelligent tester to the DLC3, then turn the engine switch on (IG).

    NOTICE:
    Do not start the engine.
  1. Turn the intelligent tester on and select "AIR BLEEDING" on the screen.

    NOTICE:
    1. Refer to the intelligent tester operator's manual for further details.
    2. Bleed the air by following the prompts displayed on the intelligent tester.


  1. Bleed the air according to "Step 1: Increase" on the intelligent tester display.

    NOTICE:
    Make sure that the master cylinder reservoir tank does not become empty of brake fluid.



      Lexus Gs430, Gs300. Uzs190 Grs190
    1. Connect a vinyl tube to either one of the bleeder plugs.

    2. Depress the brake pedal several times, then loosen the bleeder plug connected to the vinyl tube with the pedal depressed.



    3. Lexus Gs430, Gs300. Uzs190 Grs190
    4. When fluid stops coming out, tighten the bleeder plug, then release the brake pedal.

    5. Repeat (2) and (3) until all the air in the fluid is completely bled out.

    6. Using SST, tighten the bleeder plug completely.

      Torque:
      11 N*m{112 kgf*cm, 8 ft.*lbf}
      SST
      09023-00101
    7. Repeat the above procedures for the rest of the wheels to bleed the air from the brake line.



  1. Bleed the air from the suction line according to "Step 2: Inhalation" on the intelligent tester display.

    NOTICE:
    1. Bleed the suction line by following the prompts displayed on the intelligent tester.
    2. Make sure that the master cylinder reservoir tank does not become empty of brake fluid.



      Lexus Gs430, Gs300. Uzs190 Grs190
    1. Connect a vinyl tube to the bleeder plug at the right front wheel or the right rear wheel and loosen the bleeder plug.

    2. Operate the ABS and TRACTION actuator assembly to bleed the air using the intelligent tester.

      NOTICE:
      1. The operation stops automatically in 4 seconds.
      2. At this time, be sure to release the brake pedal.
    3. Check that the operation has stopped by referring to the intelligent tester display and tighten the bleeder plug.

    4. Repeat (2) and (3) until all the air in the fluid is completely bled out.

    5. Using SST, tighten the bleeder plug completely.

      Torque:
      11 N*m{112 kgf*cm, 8 ft.*lbf}
      SST
      09023-00101
    6. For the rest of the wheels, bleed the air in the same way as stated in the above procedures.



  1. Bleed the air from the pressure reduction line according to "Step 3: Decrease" on the intelligent tester display.

    NOTICE:
    1. Bleed the pressure reduction line by following the prompts displayed on the intelligent tester.
    2. Make sure that the master cylinder reservoir tank does not become empty of brake fluid.

    1. Connect a vinyl tube to either one of the bleeder plugs.

    2. Loosen the bleeder plug.



    3. Lexus Gs430, Gs300. Uzs190 Grs190
    4. Using the intelligent tester, operate the ABS and TRACTION actuator assembly, completely depress the brake pedal and hold it.

      NOTICE:
      1. The operation stops automatically in 4 seconds. When performing this procedure continuously, an interval of at least 20 seconds is required.
      2. When the operation is completed, the brake pedal slightly goes down. This is a normal phenomenon when the solenoid opens.
      3. During this procedure, the pedal seems heavy, but completely depress it so that the brake fluid comes out from the bleeder plug.
      4. Be sure to keep the brake pedal depressed. Never depress and release the pedal repeatedly.
    5. Tighten the bleeder plug, then release the brake pedal.

    6. Repeat (2) to (4) until all the air in the fluid is completely bled out.

    7. Using SST, tighten the bleeder plug completely.

      Torque:
      11 N*m{112 kgf*cm, 8 ft.*lbf}
      SST
      09023-00101
    8. Repeat the above procedures for the rest of the brakes to bleed the air from the brake line.



  1. Bleed the air from the brake line again according to "Step 4: Increase" on the intelligent tester display.

    NOTICE:
    1. Bleed the air from the brake line again according to "Step 4: Increase" on the intelligent tester display.
    2. Make sure that the master cylinder reservoir tank does not become empty of brake fluid.

    1. Connect a vinyl tube to either one of the bleeder plugs.



    2. Lexus Gs430, Gs300. Uzs190 Grs190
    3. Depress the brake pedal several times, then loosen the bleeder plug connected to the vinyl tube with the pedal depressed.



    4. Lexus Gs430, Gs300. Uzs190 Grs190
    5. When fluid stops coming out, tighten the bleeder plug, then release the brake pedal.

    6. Repeat (2) and (3) until all the air in the fluid is completely bled out.

    7. Using SST, tighten the bleeder plug completely.

      Torque:
      11 N*m{112 kgf*cm, 8 ft.*lbf}
      SST
      09023-00101
    8. Repeat the above procedures for each brake to bleed the air from the brake line.

  1. Finish "AIR BLEEDING" on the intelligent tester and turn off the power.

  1. Disconnect the intelligent tester from the DLC3.

  1. Turn the engine switch off.



7. INSTALL FRONT WHEEL
Torque:
103 N*m{1,050 kgf*cm, 76 ft.*lbf}


8. CHECK FLUID LEVEL IN RESERVOIR
  1. Check the fluid level and add fluid if necessary.

    Fluid:
    SAE J1703 or FMVSS No. 116 DOT3
    If fluid leaks, tighten or replace the leaking part.


9. INSPECT BRAKE FLUID LEAKAGE


10. CLEAR DTC
(Click here)


11. CHECK VSC SENSOR SIGNAL
(Click here)


12. CHECK ACTUATOR WITH INTELLIGENT TESTER
(Click here)


13. INSTALL COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY


    Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Push the ventilator louver in the direction indicated by the arrow in the illustration. Attach the 10 claws to install the ventilator louver.



    Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Attach the 5 claws and 2 clips to install the ventilator louver.



14. INSTALL FRONT FENDER TO COWL SIDE SEAL LH


    Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Push the cowl side seal in the direction indicated by the arrow in the illustration. Attach the 2 claws to install the cowl side seal.



15. INSTALL FRONT FENDER TO COWL SIDE SEAL RH
HINT:
Use the same procedures described for the LH side.


16. INSTALL FRONT WIPER ARM AND BLADE ASSEMBLY LH


Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Stop the wiper motor at the automatic stop position.

  1. Clean the wiper arm serration with a round file or equivalent.

  1. Clean the wiper pivot serration with a wire brush.



    Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Install the wiper arm and blade with the nut. Make sure that the wiper arm and blade comes to the position shown in the illustration.

    Torque:
    22 N*m{224 kgf*cm, 16 ft.*lbf}
    HINT:
    Hold down the wiper arm hinge with your hand while tightening the nut.
    Specification:
    Area
    Measurement
    A (for LHD)
    25.3 mm (0.996 in.)
    B (for LHD)
    26.2 mm (1.031 in.)
    C (for RHD)
    21.8 mm (0.858 in.)
    D (for RHD)
    28.9 mm (1.138 in.)


17. INSTALL FRONT WIPER ARM AND BLADE ASSEMBLY RH


Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Stop the wiper motor at the automatic stop position.

  1. Clean the wiper arm serration with a round file or equivalent.

  1. Clean the wiper pivot serration with a wire brush.



    Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Install the wiper arm and blade with the nut. Make sure that the wiper arm and blade comes to the position shown in the illustration.

    Torque:
    22 N*m{224 kgf*cm, 16 ft.*lbf}
    HINT:
    Hold down the wiper arm hinge with your hand while tightening the nut.
    Specification:
    Area
    Measurement
    A (for LHD)
    28.9 mm (1.138 in.)
    B (for LHD)
    21.8 mm (0.858 in.)
    C (for RHD)
    26.2 mm (1.031 in.)
    D (for RHD)
    25.3 mm (0.996 in.)
  1. Operate the front wipers while spraying washer fluid on the windshield glass. Make sure that the front wipers function properly and there is no interference with the vehicle body.



18. INSTALL FRONT PILLAR TO FRONT SIDE SEAL SUB-ASSEMBLY LH


Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Attach the 3 clips to install the side seal.



19. INSTALL FRONT PILLAR TO FRONT SIDE SEAL SUB- ASSEMBLY RH
HINT:
Use the same procedures described for the LH side.


20. INSTALL ENGINE ROOM SIDE COVER RH


    Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Install the side cover with the 2 clips and nut.



21. INSTALL ENGINE ROOM SIDE COVER LH


    Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Install the side cover with the 3 clips.



22. INSTALL COOL AIR INTAKE DUCT SEAL


Lexus Gs430, Gs300. Uzs190 Grs190.Brake.Brake System.Brake Master Cylinder (W/ Vsc)  Installation
  1. Install the intake duct seal with the 7 clips.