Toyota Avalon (XX50): Brake Actuator(for Hv Model)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Brake / Brake Control / Dynamic Control Systems / Brake Actuator(for Hv Model)

Components

COMPONENTS

ILLUSTRATION

*1

FRONT STABILIZER LINK ASSEMBLY RH

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-

Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping": N*m (kgf*cm, ft.*lbf)

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-

ILLUSTRATION

*1

BRAKE ACTUATOR WITH BRACKET

*2

CONNECTOR

*3

BRAKE LINE

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Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping": N*m (kgf*cm, ft.*lbf)

*

For use with a union nut wrench

ILLUSTRATION

*1

BRAKE ACTUATOR ASSEMBLY

*2

BRAKE ACTUATOR BOLT CUSHION

*3

BRAKE ACTUATOR BRACKET ASSEMBLY

*4

BRAKE ACTUATOR CASE COLLAR

Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping": N*m (kgf*cm, ft.*lbf)

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-

Inspection

INSPECTION

PROCEDURE

1. INSPECT BRAKE ACTUATOR ASSEMBLY

(a) Inspect the solenoid circuit.

(1) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

*a

Component without harness connected

(Brake Actuator Assembly)

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-

(2) Disconnect the brake actuator assembly connector.

(3) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(4) Measure the resistance according to the value(s) in the table below.

HINT:

  • Check the brake actuator assembly when it is cooled down.
  • If the result is not as specified, replace the brake actuator assembly.

Standard Resistance:

Tester Connection

Condition

Specified Condition

5 (+BS) - 28 (SFRH)

Always

6.4 to 7.0 Ω

5 (+BS) - 31 (SFLH)

Always

6.4 to 7.0 Ω

5 (+BS) - 30 (SRRH)

Always

6.4 to 7.0 Ω

5 (+BS) - 29 (SRLH)

Always

6.4 to 7.0 Ω

5 (+BS) - 18 (SFRR)

Always

5.1 to 5.7 Ω

5 (+BS) - 15 (SFLR)

Always

5.1 to 5.7 Ω

5 (+BS) - 16 (SRRR)

Always

5.1 to 5.7 Ω

5 (+BS) - 17 (SRLR)

Always

5.1 to 5.7 Ω

Installation

INSTALLATION

CAUTION / NOTICE / HINT

HINT:

The parking brake indicator light blinks (red) when the power switch is turned on after replacing the brake actuator assembly. Operate the electric parking brake switch assembly to turn off the parking brake indicator light.

PROCEDURE

1. INSTALL BRAKE ACTUATOR BOLT CUSHION

(a) Install the 3 brake actuator bolt cushions to the brake actuator bracket assembly.

(b) Install the 3 brake actuator case collars to the brake actuator bolt cushions.

NOTICE:

Make sure that the brake actuator case collars are in full contact with the brake actuator bolt cushions.

2. INSTALL BRAKE ACTUATOR ASSEMBLY

(a) Install the brake actuator assembly to the brake actuator bracket assembly with the 3 bolts.

Torque:

6.5 N·m {66 kgf·cm, 58 in·lbf}

NOTICE:

  • Do not remove the hole plugs of a new brake actuator assembly before connecting the brake lines because the brake actuator assembly is filled with brake fluid.
  • Do not hold the brake actuator assembly by the connector.
  • Do not drop the brake actuator assembly when carrying it.

3. INSTALL BRAKE ACTUATOR WITH BRACKET

(a) Temporarily install the brake actuator with bracket to the vehicle body as shown in the illustration.

NOTICE:

  • Do not kink or damage the brake lines.
  • Do not allow any foreign matter such as dirt or dust to enter the brake lines from the connecting parts.
  • Be careful not to allow any brake fluid to enter the connector.
  • Do not hold the brake actuator assembly by the connector.
  • Do not drop the brake actuator with bracket when carrying it.

HINT:

Install the brake actuator with bracket while avoiding the brake lines.

(b) Install the 2 bolts and nut in the order shown in the illustration.

Torque:

19 N·m {194 kgf·cm, 14 ft·lbf}

HINT:

Install the 2 bolts from the bottom of the vehicle.

(c) Temporarily tighten the 2 brake lines to the correct positions on the brake actuator assembly as shown in the illustration.

NOTICE:

  • Do not kink or damage the brake lines.
  • Do not allow any foreign matter such as dirt or dust to enter the brake lines from the connecting parts.

*a

From 1st Chamber of Brake Booster with Master Cylinder Assembly

*b

From 2nd Chamber of Brake Booster with Master Cylinder Assembly

(d) Using a union nut wrench, fully tighten each brake line.

Torque:

Specified tightening torque :

15.2 N·m {155 kgf·cm, 11 ft·lbf}

NOTICE:

Do not kink or damage the brake lines.

HINT:

  • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

    Click here

  • When using a union nut wrench (fulcrum length of 22 mm (0.866 in.)) + torque wrench (fulcrum length of 162 mm (6.38 in.)):

    13.4 N*m (137 kgf*cm, 10 ft.*lbf)

*a

Torque Wrench Fulcrum Length

*b

Union Nut Wrench

(e) Temporarily tighten the brake line to the correct position on the brake actuator assembly as shown in the illustration.

NOTICE:

  • Do not kink or damage the brake line.
  • Do not allow any foreign matter such as dirt or dust to enter the brake line from the connecting parts.

*a

To Front Wheel Cylinder Assembly LH

(f) Using a union nut wrench, fully tighten the brake line.

Torque:

Specified tightening torque :

15.2 N·m {155 kgf·cm, 11 ft·lbf}

NOTICE:

Do not kink or damage the brake line.

HINT:

  • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

    Click here

  • When using a union nut wrench (fulcrum length of 22 mm (0.866 in.)) + torque wrench (fulcrum length of 162 mm (6.38 in.)):

    13.4 N*m (137 kgf*cm, 10 ft.*lbf)

*a

Torque Wrench Fulcrum Length

*b

Union Nut Wrench

(g) Temporarily tighten the brake line to the correct position on the brake actuator assembly as shown in the illustration.

NOTICE:

  • Do not kink or damage the brake line.
  • Do not allow any foreign matter such as dirt or dust to enter the brake line from the connecting parts.

*a

To Rear Wheel Cylinder Assembly RH

(h) Using a union nut wrench, fully tighten the brake line.

Torque:

Specified tightening torque :

15.2 N·m {155 kgf·cm, 11 ft·lbf}

NOTICE:

Do not kink or damage the brake line.

HINT:

  • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

    Click here

  • When using a union nut wrench (fulcrum length of 22 mm (0.866 in.)) + torque wrench (fulcrum length of 162 mm (6.38 in.)):

    13.4 N*m (137 kgf*cm, 10 ft.*lbf)

*a

Torque Wrench Fulcrum Length

*b

Union Nut Wrench

(i) Temporarily tighten the 2 brake lines to the correct positions on the brake actuator assembly as shown in the illustration.

NOTICE:

  • Do not kink or damage the brake lines.
  • Do not allow any foreign matter such as dirt or dust to enter the brake lines from the connecting parts.

*a

To Front Wheel Cylinder Assembly RH

*b

To Rear Wheel Cylinder Assembly LH

(j) Using a union nut wrench, fully tighten each brake line.

Torque:

Specified tightening torque :

15.2 N·m {155 kgf·cm, 11 ft·lbf}

NOTICE:

Do not kink or damage the brake lines.

HINT:

  • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

    Click here

  • When using a union nut wrench (fulcrum length of 22 mm (0.866 in.)) + torque wrench (fulcrum length of 162 mm (6.38 in.)):

    13.4 N*m (137 kgf*cm, 10 ft.*lbf)

*a

Torque Wrench Fulcrum Length

*b

Union Nut Wrench

(k) Connect the connector to the brake actuator assembly and lock the lock lever.

Connect the connector

Lock the lock lever

NOTICE:

  • Make sure that the connector is locked securely.
  • Make sure that the actuator connector can be connected smoothly.
  • Do not allow water, oil or dirt to enter the connector.

4. INSTALL FRONT STABILIZER LINK ASSEMBLY RH

HINT:

Use the same procedure as for the LH side.

Click here

5. INSTALL FRONT WHEEL RH

Click here

6. INSTALL BRAKE BOOSTER PUMP ASSEMBLY

Click here

Removal

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed, installed, or replaced during brake actuator assembly removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced (for HV Model:)

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function when Necessary Procedure not Performed

Link
*: When performing learning using the Techstream.

Click here

Auxiliary battery terminal is disconnected/reconnected

Perform steering sensor zero point calibration

Lane Departure Alert System (w/ Steering Control)

Pre-collision System

Intelligent Clearance Sonar System*

Lighting System (for HV Model with Cornering Light)

Memorize steering angle neutral point

Parking Assist Monitor System

Panoramic View Monitor System

Replacement of brake actuator assembly
  1. Bleed air
  2. Clear the data stored during previous linear solenoid valve offset learning, ABS holding solenoid valve learning, brake pedal stroke sensor assembly zero point calibration and system information memorization
  3. Perform linear solenoid valve offset learning, ABS holding solenoid valve learning, brake pedal stroke sensor assembly zero point calibration and system information memorization
  • DTCs are stored
  • ABS warning light illuminates
  • Brake warning light / yellow (minor malfunction) illuminates
  • Slip indicator light illuminates
  • VSC disabled or malfunctions

for Initialization:

for Calibration:

Operate the electric parking brake switch (electric parking brake switch assembly)

Parking brake indicator light blinks when the power switch is first turned on (IG)

NOTICE:

While the auxiliary battery is connected, even if the power switch is off, the brake control system activates when the brake pedal is depressed or any door courtesy switch turns on. Therefore, when servicing the brake system components, do not operate the brake pedal or open/close the doors while the auxiliary battery is connected.

PROCEDURE

1. REMOVE BRAKE BOOSTER PUMP ASSEMBLY

Click here

2. REMOVE FRONT WHEEL RH

Click here

3. SEPARATE FRONT STABILIZER LINK ASSEMBLY RH

HINT:

Use the same procedure as for the LH side.

Click here

4. REMOVE BRAKE ACTUATOR WITH BRACKET

(a) Release the lock lever and disconnect the connector from the brake actuator assembly.

Release the lock lever

Disconnect the connector

NOTICE:

Be careful not to allow any brake fluid to enter the connector.

(b) Use tags or make a memo to identify the places to reconnect the brake lines.

*a

From 1st Chamber of Brake Booster with Master Cylinder Assembly

*b

From 2nd Chamber of Brake Booster with Master Cylinder Assembly

*c

To Front Wheel Cylinder Assembly RH

*d

To Rear Wheel Cylinder Assembly LH

*e

To Rear Wheel Cylinder Assembly RH

*f

To Front Wheel Cylinder Assembly LH

(c) Using a union nut wrench, disconnect the 6 brake lines from the brake actuator assembly.

NOTICE:

  • Do not kink or damage the brake lines.
  • Do not allow any foreign matter such as dirt or dust to enter the brake lines from the connecting parts.

(d) Apply protective tape to the vehicle body as shown in the illustration.

Protective Tape

(e) Remove the 2 bolts.

HINT:

Insert the tool from the bottom of the vehicle.

(f) Remove the nut.

(g) Remove the brake actuator with bracket as shown in the illustration.

NOTICE:

  • Do not kink or damage the brake lines.
  • Do not allow any foreign matter such as dirt or dust to enter the brake lines from the connecting parts.
  • Be careful not to allow any brake fluid to enter the connector.
  • Do not hold the brake actuator assembly by the connector.
  • Do not drop the brake actuator with bracket when carrying it.

HINT:

Remove the brake actuator with bracket while avoiding the brake lines.

5. REMOVE BRAKE ACTUATOR ASSEMBLY

(a) Remove the 3 bolts and brake actuator assembly from the brake actuator bracket assembly.

NOTICE:

  • Do not hold the brake actuator assembly by the connector.
  • Do not drop the brake actuator assembly when carrying it.

6. REMOVE BRAKE ACTUATOR BOLT CUSHION

(a) Remove the 3 brake actuator case collars from the brake actuator bolt cushions.

*1

Brake Actuator Case Collar

*2

Brake Actuator Bolt Cushion

(b) Remove the 3 brake actuator bolt cushions from the brake actuator bracket assembly.

Brake Actuator(for Gasoline Model)

Brake Hold Switch

See More:

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

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