Brake Fluid - Bleeding

Lexus IS250 IS220d GSE20 ALE20 - BRAKE

BRAKE FLUID - BLEEDING

  • HINT:
  • If any work is performed on the brake system or if air in the brake lines is suspected, bleed the air from the brake system.
  • NOTICE:
Move the shift lever to the P position and apply the parking brake before bleeding the brakes (for Automatic Transmission ).
Move the shift lever to the Neutral position and apply the parking brake before bleeding the brakes (for Manual Transmission).
Add brake fluid to keep the level between MIN and MAX lines of the reservoir while bleeding the brakes.
If brake fluid leaks onto any painted surface, wash off or remove the brake fluid completely.
1. FILL RESERVOIR WITH BRAKE FLUID
Brake Fluid - Bleeding. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Fill the reservoir with brake fluid.

  • Fluid:
  • SAE J1703 or FMVSS No. 116 DOT3
2. BLEED MASTER CYLINDER
  • 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 Fluid - Bleeding. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Disconnect the 2 brake lines from the master cylinder.

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

Brake Fluid - Bleeding. BRAKE. 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}
3. BLEED BRAKE LINE
  • NOTICE:
  • Bleed the brake line at the wheel furthest from the master cylinder.
Brake Fluid - Bleeding. BRAKE. 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 Fluid - Bleeding. BRAKE. 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.

4. 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 Fluid - Bleeding. BRAKE. 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 Fluid - Bleeding. BRAKE. 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 Fluid - Bleeding. BRAKE. 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 Fluid - Bleeding. BRAKE. 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 Fluid - Bleeding. BRAKE. 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 Fluid - Bleeding. BRAKE. 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 Fluid - Bleeding. BRAKE. 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 Fluid - Bleeding. BRAKE. 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 Fluid - Bleeding. BRAKE. 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.

5. INSPECT FLUID LEVEL IN RESERVOIR

Check the fluid level and add fluid if necessary.

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