Toyota Yaris: Vehicle Stability Control System / Excessive Brake Pedal Travel (No Fluid Leaks and No Air in System)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Brake / Brake Control / Dynamic Control Systems / Vehicle Stability Control System / Excessive Brake Pedal Travel (No Fluid Leaks and No Air in System)

CAUTION / NOTICE / HINT

NOTICE:

After replacing the skid control ECU (brake actuator assembly), perform "Calibration".

Click here

PROCEDURE

1.

PRE-INSPECTION

(a) Brake pedal inspection

(1) Perform a visual inspection and operate the brake pedal to check for any malfunctions.

(2) Check the brake pedal height, brake pedal free play and brake pedal reserve distance.

Click here

HINT:

If the brake pedal height is not within specification, confirm that there are no other malfunctions before adjusting the brake pedal height.

(b) Brake inspection

(1) Check that the disc brake pads of each wheel are installed correctly.

(2) Check that the bleeder plug and union bolt is not loose, and that there are no damaged gaskets or brake fluid leaks, for each wheel cylinder.

(c) Brake fluid leaks and air in brake line inspection

(1) Check and take a note of the fluid level in the brake master cylinder reservoir assembly.

(2) Repeatedly depress the brake pedal and confirm that the brake pedal feels normal (no air in the system, etc.).

(3) Check if the brake fluid level in the brake master cylinder reservoir assembly has changed.

(4) If the brake fluid level has decreased, check for leaks due to damaged brake lines or hoses, loose union nuts, damaged brake master cylinder sub-assembly seals, etc.

(d) Bleeding air from brake system

(1) Bleed air from the brake lines and brake actuator assembly.

Click here

NEXT

2.

PERFORM ACTIVE TEST USING GTS (MOTOR RELAY)

(a) Perform the Active Test of the motor relay using the GTS.

Chassis > Brake > Active Test

Tester Display

Measurement Item

Control Range

Restrict Condition

Diagnostic Note

Motor Relay

ABS motor relay

OFF / ON

Vehicle condition: Vehicle stopped

HINT:

To protect this Actuator and Solenoid, this test will only last 5 seconds.

-

Chassis > Brake > Active Test

Tester Display

Motor Relay

(b) Fully depress and hold the brake pedal.

HINT:

Make sure that the brake pedal has travelled excessively before holding it depressed.

(c) Operate the motor relay using the Active Test and check if the brake pedal height changes when the pump motor is operating.

OK:

The brake pedal height does not change (the brake pedal travel remains excessive).

NG

REPLACE BRAKE ACTUATOR ASSEMBLY

OK

3.

CHECK BRAKE MASTER CYLINDER SUB-ASSEMBLY

(a) Check that there are no brake fluid leaks and no indications of a malfunction in the brake master cylinder sub-assembly.

OK:

There are no brake fluid leaks and no indications of a malfunction in the brake master cylinder sub-assembly.

NG

REPLACE BRAKE MASTER CYLINDER SUB-ASSEMBLY

OK

4.

INSPECT BRAKE BOOSTER ASSEMBLY

Click here

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE BRAKE BOOSTER ASSEMBLY

    Zero Point Calibration of Steering Angle Sensor Not Acquired (X20D8)

    DESCRIPTION Code Tester Display Measurement Item Trouble Area RoB Output from X20D8 Zero Point Calibration of Steering Angle Sensor Not Acquired History of being unable to obtain the steering angle zero point Sensor installation Yaw rate and acceleration sensor (airbag sensor assembly) Brake CAUTION / NOTICE / HINT NOTICE: This Vehicle Control History (RoB) may be output during situations when the steering angle sensor zero point calibration temporarily cannot be acquired, such as when the stop light is stuck ON...

    ABS Operates Before Necessary When Braking

    DESCRIPTION Troubleshooting for when ABS operates too soon due to a noisy signal from the speed sensor, a difference in output, etc. CAUTION / NOTICE / HINT NOTICE: After replacing or removing and installing a speed sensor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly...

    Other information:

    Toyota Yaris XP210 (2020-2022) Owner's Manual: Hill Launch Assist (HLA)(If equipped)


    Hill Launch Assist (HLA) is a function which assists the driver in accelerating from a stop while on a slope. When the driver releases the brake pedal and depresses the accelerator pedal while on a slope, the function prevents the vehicle from rolling...

    Toyota Yaris XP210 (2020-2022) Owner's Manual: Operating Tips for OGG


    OGG is the audio compression format for Xiph. Org Foundation. Audio data can be created and stored at a higher compression ratio than MP3. This unit plays files with the extension (.ogg) as OGG files. OGG files written under specifications other than the indicated specification may not play normally or files or folder names may not display correctly...

    Categories

    Fuel Gauge

    The fuel gauge shows approximately how much fuel is remaining in the tank when the ignition is switched ON. We recommend keeping the tank over 1/4 full.

    Toyota Yaris. Fuel Gauge

    Full 1/4 Full Empty

    read more

     
    Copyright © 2022 www.toyaris4.com