Lexus IS250 IS220d GSE20 ALE20 - BRAKE

BRAKE PEDAL - INSTALLATION

1. INSTALL BRAKE PEDAL PAD
2. INSTALL CUSHION
3. INSTALL STOP LIGHT SWITCH ASSEMBLY

Temporarily install the stop light switch assembly with the lock nut.

Fully tighten the stop light switch assembly with the lock nut after inspecting and adjusting brake pedal height .

4. INSTALL BRAKE PEDAL SUPPORT ASSEMBLY
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Install the brake pedal support assembly with the bolt.

  • Torque:
  • 21 N*m{ 214 kgf*cm, 16 ft.*lbf}
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Engage the wire harness clamp.

Connect the 2 connectors.

5. INSTALL BRAKE BOOSTER GASKET

Install a new brake booster gasket to the brake booster assembly.

6. INSTALL BRAKE BOOSTER ASSEMBLY
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Install the brake booster assembly with the 4 nuts.

  • Torque:
  • 12.7 N*m{ 130 kgf*cm, 9 ft.*lbf}
  • NOTICE:
  • Do not damage the brake lines.
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Connect the vacuum hose with the clip.

7. INSTALL BRAKE MASTER CYLINDER PUSH ROD CLEVIS
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Apply lithium soap base glycol grease to the clevis pin.

Install the push rod clevis to the brake pedal support assembly with the clevis pin and a new clip.

8. INSTALL BRAKE PEDAL RETURN SPRING

Remove the brake pedal return spring.

9. INSTALL BRAKE MASTER CYLINDER SUB-ASSEMBLY

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

Brake Pedal - Installation. BRAKE. 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 Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Brake Pedal - Installation. BRAKE. 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.

10. CONNECT CLUTCH RESERVOIR HOSE (for Manual Transmission)

Connect the clutch reservoir hose with the clamp.

11. INSTALL BRAKE ACTUATOR ASSEMBLY WITH BRACKET

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

Brake Pedal - Installation. BRAKE. 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 Pedal - Installation. BRAKE. 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 Pedal - Installation. BRAKE. 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.
12. INSTALL NO. 3 ENGINE ROOM RELAY BLOCK
Brake Pedal - Installation. BRAKE. 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}
13. CONNECT BATTERY NEGATIVE TERMINAL
14. ADD BRAKE FLUID
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Fill the reservoir with brake fluid.

  • Fluid:
  • SAE J1703 or FMVSS No. 116 DOT3
15. 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 Pedal - Installation. 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 Pedal - Installation. 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}
16. BLEED BRAKE LINE
  • NOTICE:
  • Bleed the brake line at the wheel furthest from the master cylinder.
Brake Pedal - Installation. 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 Pedal - Installation. 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.

17. 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 Pedal - Installation. 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 Pedal - Installation. 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 Pedal - Installation. 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 Pedal - Installation. 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 Pedal - Installation. 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 Pedal - Installation. 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 Pedal - Installation. 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 Pedal - Installation. 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 Pedal - Installation. 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.

18. BLEED AIR FROM CLUTCH LINE (for Manual Transmission)
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Remove the bleeder plug cap.

Connect a vinyl tube to the bleeder plug.

Depress the clutch pedal several times, and then loosen the bleeder plug with the pedal depressed.

When fluid no longer comes out, tighten the bleeder plug, and then release the clutch pedal.

Repeat the previous 2 steps until all the air in the fluid is completely bled.

Tighten the bleeder plug.

  • Torque:
  • 11 N*m{ 112 kgf*cm, 8 ft.*lbf}

Install the bleeder plug cap.

Check that all the air has been bled from the clutch line.

19. 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.
20. INSPECT FOR BRAKE FLUID LEAKAGE
21. INSPECT AND ADJUST BRAKE PEDAL HEIGHT
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Check the brake pedal height.

  • Pedal height from asphalt sheet (AT for LHD):
  • 151.8 to 161.8 mm (5.976 to 6.370 in.)
  • Pedal height from asphalt sheet (AT for RHD):
  • 147.0 to 157.0 mm (5.787 to 6.181 in.)
  • Pedal height from asphalt sheet (MT for LHD):
  • 146.6 to 156.6 mm (5.772 to 6.165 in.)
  • Pedal height from asphalt sheet (MT for RHD):
  • 154.0 to 164.0 mm (6.063 to 6.457 in.)

Adjust brake pedal height.

Disconnect the connector from the stop light switch assembly.

Loosen the stop light switch lock nut. Turn the switch in order to give the pedal some free play.

Remove the brake booster assembly.

Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Loosen the push rod lock nut, turn the push rod clevis and adjust dimension "A" shown in the illustration.

  • Dimension "A":
  • 146.2 to 147.2 mm (5.756 to 5.795 in.)

Tighten the push rod lock nut.

  • Torque:
  • 26 N*m{ 265 kgf*cm, 19 ft.*lbf}

Install the brake booster assembly.

Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Turn the stop light switch assembly so that the clearance between the switch and the area where the pedal makes contact is between 0.5 and 2.4 mm (0.020 to 0.095 in.). Tighten the lock nut.

  • Torque:
  • 17 N*m{ 170 kgf*cm, 12 ft.*lbf}

Connect the connector to the stop light switch assembly.

22. INSPECT PEDAL FREE PLAY

Stop the engine and depress the brake pedal several times until no vacuum is left in the booster.

Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Press the pedal until a slight resistance is felt. Measure the distance as shown in the illustration.

  • Pedal free play:
  • 1.0 to 2.0 mm (0.039 to 0.079 in.)

If the pedal free play is 1.0 mm (0.039 in.) or less, check the protrusion of the stop light switch assembly shaft.


  • Protrusion of the stop light switch assembly shaft:
  • 0.5 to 2.4 mm (0.020 to 0.095 in.)

If the protrusion is not within the specified range, adjust it.


If the protrusion of the stop light switch is within the specified range, and the brake pedal free play is 1.0 mm (0.039 in.) or less, the brake pedal free play can be considered acceptable.


23. INSPECT PEDAL RESERVE DISTANCE
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Release the parking brake pedal.

With the engine running, depress the pedal and measure the pedal reserve distance as shown in the illustration.

  • Pedal reserve distance from asphalt sheet at 490 N (50 kgf, 110 lbf):
  • 4GR-FSE, AT, for LHD:
  • More than 108 mm (4.25 in.)
  • 4GR-FSE, AT, for RHD:
  • More than 104 mm (4.09 in.)
  • 4GR-FSE, MT, for LHD:
  • More than 104 mm (4.09 in.)
  • 4GR-FSE, MT, for RHD:
  • More than 110 mm (4.33 in.)
  • 2AD-FHV, MT, for LHD:
  • More than 103 mm (4.06 in.)
  • 2AD-FHV, MT, for RHD:
  • More than 108 mm (4.25 in.)

If incorrect, troubleshoot the brake system.


24. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
  • CAUTION:
  • Wait for 90 seconds after disconnecting the terminal to prevent airbag deployment.
25. INSTALL DRIVER SIDE KNEE AIRBAG ASSEMBLY
26. INSTALL LOWER INSTRUMENT PANEL FINISH PANEL SUB-ASSEMBLY
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Connect the connectors.

Engage the 7 clips and install the lower instrument panel finish panel sub-assembly.

27. INSTALL NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Connect the connectors.

Insert the No. 1 instrument panel under cover sub-assembly into the guide as shown in the illustration.

Engage the 2 claws.

Install the No. 1 instrument panel under cover sub-assembly with the 2 screws <E-.

28. INSTALL INSTRUMENT SIDE PANEL LH
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Engage the 5 claws and 3 clips, and then install the side instrument panel LH.

29. INSTALL INSTRUMENT SIDE PANEL RH
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Engage the 5 claws and 3 clips, and then install the side instrument panel RH.

30. INSTALL FRONT DOOR OPENING TRIM COVER LH
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Engage the 6 claws and install the front door opening trim cover LH.

31. INSTALL FRONT DOOR OPENING TRIM COVER RH
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Engage the 6 claws and install the front door opening trim cover RH.

32. INSTALL FRONT DOOR SCUFF PLATE LH
33. INSTALL FRONT DOOR SCUFF PLATE RH
34. INSTALL FRONT WHEEL
  • Torque:
  • 103 N*m{ 1,050 kgf*cm, 76 ft.*lbf}
35. INSTALL COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Engage the 11 claws.

Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

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

36. INSTALL WINDSHIELD WIPER ARM AND BLADE ASSEMBLY RH

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

Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Clean the wiper arm serrations.

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

Brake Pedal - Installation. BRAKE. 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.

37. INSTALL WINDSHIELD WIPER ARM AND BLADE ASSEMBLY LH

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

Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Clean the wiper arm serrations.

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

Brake Pedal - Installation. BRAKE. 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.)
38. INSTALL FRONT WIPER ARM HEAD CAP
Brake Pedal - Installation. BRAKE. 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.
39. INSTALL ROOF DRIP SIDE FINISH MOULDING RH
Brake Pedal - Installation. BRAKE. 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.

40. INSTALL ROOF DRIP SIDE FINISH MOULDING LH
41. INSTALL FRONT UPPER FENDER PROTECTOR RH
  • HINT:
  • Use the same procedures for the RH side and the LH side.
42. INSTALL FRONT UPPER FENDER PROTECTOR LH
Brake Pedal - Installation. BRAKE. 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.

43. INSTALL ENGINE ROOM SIDE COVER RH
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Install the side cover with the 2 clips.

44. INSTALL ENGINE ROOM SIDE COVER LH
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Install the side cover with the 5 clips.

45. INSTALL COOL AIR INTAKE DUCT SEAL
Brake Pedal - Installation. BRAKE. Lexus IS250 IS220d GSE20 ALE20

Install the intake duct seal with the 11 clips.

46. CONNECT BATTERY NEGATIVE TERMINAL
47. CHECK AND CLEAR DTC
  • HINT:
48. INSPECT VSC SENSOR SIGNAL

Inspect the VSC sensor signal .

49. INSPECT ACTUATOR WITH INTELLIGENT TESTER
  • HINT:
50. INSPECT SRS WARNING LIGHT
  • HINT:
51. PERFORM INITIALIZATION

Some systems need initialization after reconnecting the battery negative terminal .

LEXUS IS250, IS220d / GSE20 ALE20