Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001YN7F
Model Year Start: 2022 Model: Avalon HV Prod Date Range: [08/2021 -           ]
Title: BRAKE SYSTEM (OTHER): BRAKE BOOSTER PUMP(for HV Model): REMOVAL; 2022 MY Avalon HV [08/2021 -        ]

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 booster pump assembly removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function when Necessary Procedure not Performed

Link
*: When performing learning using the Techstream.

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; PARK ASSIST / MONITORING: INTELLIGENT CLEARANCE SONAR SYSTEM (for HV Model): CALIBRATION

Auxiliary battery terminal is disconnected/reconnected

Perform steering sensor zero point calibration

Lane Tracing Assist System

2022 MY Avalon Avalon HV [08/2021 -        ]; PRE-COLLISION: PRE-COLLISION SYSTEM: INITIALIZATION

Pre-collision System

Intelligent Clearance Sonar System*

Lighting System (for HV Model with Cornering Light)

Memorize steering angle neutral point

Parking Assist Monitor System

2019 - 2022 MY Avalon HV [04/2018 -        ]; PARK ASSIST / MONITORING: PARKING ASSIST MONITOR SYSTEM(for HV Model): INITIALIZATION

Panoramic View Monitor System

2019 - 2022 MY Avalon HV [04/2018 -        ]; PARK ASSIST / MONITORING: PANORAMIC VIEW MONITOR SYSTEM (for HV Model): INITIALIZATION

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. PRECAUTION

NOTICE:

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

2. PERFORM ACCUMULATOR PRESSURE ZERO DOWN

Click here 2022 MY Avalon HV [08/2021 -        ]; BRAKE SYSTEM (OTHER): BRAKE BOOSTER (for HV Model): REMOVAL+

3. REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; WIPER / WASHER: FRONT WIPER MOTOR: REMOVAL

4. REMOVE FRONT CENTER UPPER SUSPENSION BRACE SUB-ASSEMBLY

Click here 2022 MY Avalon HV [08/2021 -        ]; BRAKE SYSTEM (OTHER): BRAKE BOOSTER (for HV Model): REMOVAL+

5. REMOVE NO. 1 ENGINE COVER SUB-ASSEMBLY

Click here 2022 MY Avalon HV [08/2021 -        ]; A25A-FXS (ENGINE MECHANICAL): ENGINE ASSEMBLY: REMOVAL+

6. DRAIN BRAKE FLUID

NOTICE:

If brake fluid leaks onto any painted surface, immediately wash it off.

7. DISCONNECT NO. 2 BRAKE ACTUATOR HOSE

(a) Slide the clip and disconnect the No. 2 brake actuator hose from the No. 1 brake actuator tube.

8. DISCONNECT ACCUMULATOR TO BRAKE MASTER CYLINDER TUBE

(a) Using a union nut wrench, disconnect the accumulator to brake master cylinder tube from the brake booster pump assembly.

NOTICE:

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

9. REMOVE BRAKE BOOSTER PUMP ASSEMBLY

(a) Release the lock lever and disconnect the connector from the brake booster pump assembly as shown in the illustration.

Release the lock lever

Disconnect the connector

NOTICE:

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

(b) Disengage the claw and clamp to separate the brake booster pump assembly wire harness from the brake actuator bracket assembly.

(c) Remove the nut from the brake booster pump assembly.

(d) Remove the brake booster pump assembly, brake booster pump bushing and brake actuator case collar from the brake actuator bracket assembly as shown in the illustration.

NOTICE:

  • Do not apply excessive force to the brake lines.
  • Do not carry the brake booster pump assembly by the parts shown in the illustration.
  • Do not drop the brake booster pump assembly when carrying it.
  • Be careful not to allow brake fluid to enter the connector.

*a

Union

*b

Connector

*c

Wire Harness

*d

Stud

Remove in this Direction

(e) Remove the 2 brake booster pump collars and 2 brake booster pump bushings from the brake booster pump assembly.

HINT:

Perform this procedure only when replacement of the brake booster pump collars or brake booster pump bushings is necessary.

10. REMOVE NO. 2 BRAKE ACTUATOR HOSE

(a) Slide the clip and remove the No. 2 brake actuator hose from the brake booster pump assembly.