Lexus IS250 IS220d GSE20 ALE20 - BRAKE CONTROL

BRAKE ACTUATOR - INSTALLATION

1. INSTALL BRAKE ACTUATOR BOLT CUSHION
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Install the 2 brake actuator bolt cushions and 2 bolts to the brake actuator assembly.

2. INSTALL BRAKE ACTUATOR BRACKET ASSEMBLY
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Install the brake actuator bolt cushion with the actuator bracket assembly.

Install the brake actuator to the actuator bracket assembly with the 2 nuts.

  • Torque:
  • 5.4 N*m{ 55 kgf*cm, 48 in.*lbf}
3. INSTALL BRAKE ACTUATOR ASSEMBLY WITH BRACKET

Install the actuator assembly with bracket to the body with the 2 bolts and nut.

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

  • Torque:
  • 19 N*m{ 195 kgf*cm, 14 ft.*lbf}
  • NOTICE:
  • Do not to damage the brake tubes.

Install the grommet to the body.

  • NOTICE:
  • Make sure that the grommet is installed correctly.

Temporarily tighten each brake tube to the correct positions of the brake actuator assembly with bracket as shown in the illustration.

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

  • HINT:
*1: To Front Wheel Cylinder RH
*2: To Front Wheel Cylinder LH
*3: To Rear Wheel Cylinder RH
*4: To Rear Wheel Cylinder LH
*5: From Front Master Cylinder
*6: From Rear Master Cylinder
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Using SST, fully tighten each brake tube.

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

Connect the actuator connector.

  • NOTICE:
  • Make sure that the connector is locked securely.
4. CONNECT NO. 3 FRONT BRAKE TUBE (for LHD)
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Using SST, connect the No. 3 front brake tube to the flexible hose.

  • SST
  • 09023-00101
  • Torque:
  • 15 N*m{ 155 kgf*cm, 11 ft.*lbf}
5. CONNECT NO. 2 FRONT BRAKE TUBE (for RHD)
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Using SST, connect the No. 2 front brake tube to the flexible hose.

  • SST
  • 09023-00101
  • Torque:
  • 15 N*m{ 155 kgf*cm, 11 ft.*lbf}
6. INSTALL BRAKE MASTER CYLINDER SUB-ASSEMBLY

Install a new O-ring to the brake master cylinder sub-assembly.

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

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}

Install the brake actuator assembly to the actuator bracket with the 2 cap nuts.

  • Torque:
  • 5.5 N*m{ 55 kgf*cm, 48 in.*lbf}

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Using SST, connect the 2 brake lines to the brake master cylinder sub-assembly.

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

Engage the clamp and connect the warning switch connector.

7. INSTALL NO. 3 ENGINE ROOM RELAY BLOCK
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Install the No. 3 engine room relay block with the bolt and nut.

  • Torque:
  • 12.5 N*m{ 127 kgf*cm, 9 ft.*lbf}
8. ADD RESERVOIR WITH BRAKE FLUID
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Fill the reservoir with brake fluid.

  • Fluid:
  • SAE J1703 or FMVSS No. 116 DOT3
9. BLEED BRAKE MASTER CYLINDER SUB-ASSEMBLY
  • HINT:
If the master cylinder is reinstalled or if the reservoir becomes empty, bleed the air from the master cylinder.
To prevent paint damage due to brake fluid, cover the painted surface with a shop rag or a piece of cloth.
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Disconnect the 2 brake lines from the master cylinder.

Slowly depress the brake pedal and hold it (*1).

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Cover the 2 outer holes with fingers, and release the brake pedal (*2).

Repeat (*1) and (*2) 3 or 4 times.

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

  • SST
  • 09023-00101
  • Torque:
  • 15 N*m{ 155 kgf*cm, 11 ft.*lbf}
10. BLEED BRAKE LINE
  • NOTICE:
  • Bleed the brake line at the wheel furthest from the master cylinder.
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Connect the vinyl tube to the bleeder plug.

Depress the brake pedal several times, then loosen the bleeder plug with the pedal depressed (*3).

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

When fluid no longer comes out, tighten the bleeder plug, then release the brake pedal (*4).

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

Using SST, tighten the bleeder plug completely.

  • SST
  • 09023-00101
  • Torque:
  • 11 N*m{ 110 kgf*cm, 8 ft.*lbf}

Repeat the above procedures for each wheel to bleed the air from the brake line.

11. BLEED BRAKE ACTUATOR ASSEMBLY
  • NOTICE:
  • After bleeding the air from the brake system, if the correct height or feel of the brake pedal cannot be obtained, bleed the air from the brake actuator assembly with the intelligent tester by following the procedures below.

Depress the brake pedal more than 20 times with the engine switch off.

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Connect the intelligent tester to the DLC3, then turn the engine switch on (IG).

  • NOTICE:
  • Do not start the engine.

Turn the intelligent tester power on and select "AIR BLEEDING" on the screen.

  • NOTICE:
Refer to the intelligent tester operator's manual for further details.
Bleed the brake actuator assembly by following the steps displayed on the intelligent tester.

Bleed the air from the actuator 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.

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

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

Depress the brake pedal several times, then loosen the bleeder plug connected to the vinyl tube with the pedal depressed (*5).

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

When fluid no longer comes out, tighten the bleeder plug, then release the brake pedal (*6).

Repeat (*5) and (*6) until all the air in the fluid is completely bled.

Using SST, tighten the bleeder plug completely.

  • SST
  • 09023-00101
  • Torque:
  • 11 N*m{ 110 kgf*cm, 8 ft.*lbf}

Repeat the above procedures for the rest of the wheels to bleed the air from the brake lines.

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

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

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Connect a vinyl tube to the bleeder plug at the right front wheel or the right rear wheel and loosen the bleeder plug.

Operate the brake actuator assembly to bleed the air using the intelligent tester (*7).

  • NOTICE:
The operation stops automatically in 4 seconds.
At this time, be sure to release the brake pedal.
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Check that the operation has stopped by referring to the intelligent tester display and tighten the bleeder plug (*8).

Repeat (*7) and (*8) until all the air in the fluid is completely bled out.

Using SST, tighten the bleeder plug completely.

  • SST
  • 09023-00101
  • Torque:
  • 11 N*m{ 110 kgf*cm, 8 ft.*lbf}

For the rest of the wheels, bleed the air in the same way as stated in the above procedures.

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

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

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

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

Loosen the bleeder plug (*9).

Using the intelligent tester, operate the brake actuator assembly, completely depress the brake pedal and hold it.

  • NOTICE:
The operation stops automatically after 4 seconds. When this operation will be repeated continuously, allow an interval of at least 20 seconds between each bleeding operation.
When the operation is completed, the brake pedal will go down slightly. This is a normal phenomenon due to the opening of the solenoid.
During this procedure, the brake pedal will seem heavy. It is necessary to completely depress it, so that brake fluid will come out of the bleeder plug.
Be sure to keep the brake pedal depressed. Never depress and release the pedal repeatedly.
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Tighten the bleeder plug, then release the brake pedal (*10).

Repeat steps (*9) to (*10) until all the air in the fluid is completely bled out.

Using SST, tighten the bleeder plug completely.

  • SST
  • 09023-00101
  • Torque:
  • 11 N*m{ 110 kgf*cm, 8 ft.*lbf}

Repeat the above procedures for the rest of the brakes to bleed the air from the brake line.

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

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

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

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

Depress the brake pedal several times, then loosen the bleeder plug connected to the vinyl tube with the pedal depressed (*11).

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

When fluid no longer comes out, tighten the bleeder plug, then release the brake pedal (*12).

Repeat (*11) and (*12) until all the air in the fluid is completely bled out.

Using SST, tighten the bleeder plug completely.

  • SST
  • 09023-00101
  • Torque:
  • 11 N*m{ 110 kgf*cm, 8 ft.*lbf}

Repeat the above procedures for each brake to bleed the air from the brake line.

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

Disconnect the intelligent tester from the DLC3.

Turn the engine switch off.

12. INSPECT DTC
  • HINT:
  • .
13. INSPECT FLUID LEVEL IN RESERVOIR
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Check the fluid level.


If brake fluid level is lowered, check for leakage and inspect the disc brake pad. If necessary, refill the reservoir with brake fluid after repair and replacement.

  • Fluid:
  • SAE J1703 or FMVSS No. 116 DOT 3
14. INSPECT FOR BRAKE FLUID LEAKAGE
15. INSTALL FRONT WHEEL
  • Torque:
  • 103 N*m{ 1,050 kgf*cm, 76 ft.*lbf}
16. INSTALL COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Engage the 11 claws.

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Install the cowl top ventilator louver sub-assembly with the 2 clips.

17. INSTALL FRONT WIPER ARM AND BLADE ASSEMBLY LH

Operate the wiper, and stop the windshield wiper motor at the automatic stop position.

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Clean the wiper arm serrations.

Clean the wiper pivot serrations with a wire brush (when reinstalling).

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Install the front wiper arm and blade assembly LH with the nut at the position as shown in the illustration.

  • Torque:
  • 22 N*m{ 224 kgf*cm, 16 ft.*lbf}
  • HINT:
  • Hold the arm hinge by hand to fasten the nut.
AreaMeasurement
A15 to 30 mm (0.59 to 1.18 in.)
BApprox. 40 mm (1.57 in.)
18. INSTALL FRONT WIPER ARM AND BLADE ASSEMBLY RH

Operate the wiper, and stop the windshield wiper motor at the automatic stop position.

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Clean the wiper arm serrations.

Clean the wiper pivot serrations with a wire brush (when reinstalling).

Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Install the front wiper arm and blade assembly RH with the nut at the position as shown in the illustration.

  • Torque:
  • 22 N*m{ 224 kgf*cm, 16 ft.*lbf}
  • HINT:
  • Hold the arm hinge by hand to fasten the nut.
AreaMeasurement
A18.5 to 33.5 mm (0.73 to 1.32 in.)
BApprox. 20 mm (0.79 in.)

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.

19. INSTALL FRONT WIPER ARM HEAD CAP
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Install the front wiper arm head cap.

  • HINT:
  • Use the same procedures for the RH side and the LH side.
20. INSTALL FRONT UPPER FENDER PROTECTOR LH
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Engage the claw and the 3 clips, then install the front upper fender protector LH.

Engage the clip on the rubber portion of the cowl top ventilator louver sub-assembly to the front fender protector upper LH.

21. INSTALL FRONT UPPER FENDER PROTECTOR RH
  • HINT:
  • Use the same procedures for the RH side and the LH side.
22. INSTALL ENGINE ROOM SIDE COVER RH
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Install the side cover with the 2 clips.

23. INSTALL ENGINE ROOM SIDE COVER LH
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Install the side cover with the 5 clips.

24. INSTALL COOL AIR INTAKE DUCT SEAL
Brake Actuator - Installation. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Install the intake duct seal with the 11 clips.

25. PERFORM YAW RATE SENSOR ZERO POINT CALIBRATION
  • HINT:
26. INSPECT SENSOR SIGNAL
  • HINT:
27. INSPECT ACTUATOR WITH INTELLIGENT TESTER
  • HINT:
LEXUS IS250, IS220d / GSE20 ALE20