Toyota CH-R Service Manual: Brake Actuator Operation Sound is Loud during Initial Check

Toyota CH-R Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System / Brake Actuator Operation Sound is Loud during Initial Check

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake actuator assembly), perform system variant learning.

Click here

PROCEDURE

1.	PERFORM ROAD TEST

(a) After turning the ignition switch ON, compare the operating sound of the brake actuator the first time the vehicle speed reaches approximately 25 km/h (16 mph) with a known good vehicle of the same model.

OK:

The operating sound is the same or quieter than that of a known good vehicle of the same model.

HINT:

When the vehicle speed reaches approximately 20 km/h (12 mph), the initial check of the brake actuator assembly is performed and pump motor operation sounds are generated.

END

2.	CHECK BRAKE ACTUATOR BOLT CUSHION

(a) Check that the cushion of the brake actuator bracket assembly is not worn, damaged or deformed.

OK:

The brake actuator bracket assembly is not worn, damaged or deformed.

REPLACE BRAKE ACTUATOR BOLT CUSHION

3.	ADJUST INSTALLATION OF BRAKE ACTUATOR ASSEMBLY

(a) Drain the brake fluid.

(b) Disconnect all brake lines from the brake actuator assembly.

Click here

NOTICE:

After connecting all the brake lines, add brake fluid and bleed the brake system.

Click here

HINT:

By reducing the tension on the brake lines and cushion, the operating sound of the brake actuator assembly may be reduced.

(d) Check that no brake lines interfere the vehicle body or other components.

4.	RECHECK SYMPTOM

(a) Perform a road test and check the magnitude of the operating sound again.

OK:

The operating sound is the same or quieter than that of a known good vehicle of the same model.

USE SIMULATION METHOD TO CHECK

REPLACE BRAKE ACTUATOR ASSEMBLY

VSC does not Operate or VSC does not Operate Correctly

DESCRIPTION When ABS, TRAC or VSC is operating, the skid control ECU (brake actuator assembly) blinks the slip indicator light to inform the driver that slippage occurred. When a communication mal ...

VSC OFF Switch Circuit

DESCRIPTION The skid control ECU assembly is connected to the combination meter assembly via CAN communication. Pressing the VSC OFF switch turns off TRAC operation, and pressing and holding thi ...

Other materials:

Toyota CH-R Owners Manual > Maintenance: Maintenance requirements
To ensure safe and economical driving, day-to-day care and regular maintenance are essential. It is the owner's responsibility to perform regular checks. Toyota recommends the following maintenance: General maintenance General maintenance should be performed on a daily basis. This can be d ...

Toyota CH-R Service Manual > Continuously Variable Transaxle System: Check Mode Procedure
CHECK MODE PROCEDURE DESCRIPTION (a) Check mode has a higher sensitivity to malfunctions and can detect malfunctions that cannot be detected in normal mode. Check mode can also detect all the malfunctions that can be detected in normal mode. In check mode, DTCs are stored with 1 trip detecti ...