Toyota Avalon (XX50): Vacuum Warning Switch(for Gasoline Model)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Brake / Brake System (other) / Vacuum Warning Switch(for Gasoline Model)

Components

COMPONENTS

ILLUSTRATION

*1

CHECK VALVE GROMMET

*2

VACUUM WARNING SWITCH ASSEMBLY

Non-reusable part

-

-

Installation

INSTALLATION

PROCEDURE

1. INSTALL CHECK VALVE GROMMET

(a) Install a new check valve grommet to the brake booster assembly.

2. INSTALL VACUUM WARNING SWITCH ASSEMBLY

(a) Install the vacuum warning switch assembly to the brake booster assembly as shown in the illustration.

*a

30° +/- 20°

Up

(b) Connect the connector to the vacuum warning switch assembly.

3. INSTALL BATTERY

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On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT BRAKE FLUID LEVEL IN RESERVOIR

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2. INSPECT BRAKE BOOSTER ASSEMBLY

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3. INSPECT VACUUM WARNING SWITCH ASSEMBLY

(a) Start the engine and stop it after 1 or 2 minutes.

(b) Remove the battery.

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(c) Disconnect the connector from the vacuum warning switch assembly.

(d) Measure the resistance of the vacuum warning switch assembly.

Standard Resistance:

10 kΩ or higher

(e) With the engine stopped, depress the brake pedal several times to release vacuum from the brake booster assembly, and measure the resistance of the vacuum warning switch assembly.

Standard Resistance:

Below 1 Ω

(f) Connect the connector to the vacuum warning switch assembly.

(g) Install the battery.

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Removal

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during vacuum warning switch 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.

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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 Gasoline Model with Cornering Light)

Memorize steering angle neutral point

Parking assist monitor system

Panoramic View Monitor System

PROCEDURE

1. PRECAUTION

NOTICE:

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

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2. REMOVE BATTERY

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3. REMOVE VACUUM WARNING SWITCH ASSEMBLY

(a) Disconnect the connector from the vacuum warning switch assembly.

(b) Remove the vacuum warning switch assembly from the brake booster assembly.

4. REMOVE CHECK VALVE GROMMET

(a) Remove the check valve grommet from the brake booster assembly.

Vacuum Pump(for 2gr-fks)

Electric Parking Brake Actuator

See More:

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

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