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.

OK

END

NG

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.

NG

REPLACE BRAKE ACTUATOR BOLT CUSHION

OK

3.

ADJUST INSTALLATION OF BRAKE ACTUATOR ASSEMBLY

(a) Drain the brake fluid.

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

Click here

(c) Connect each brake line so that the cushion of the brake actuator assembly is tensioned evenly.

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.

NEXT

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.

OK

USE SIMULATION METHOD TO CHECK

NG

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 Service Manual > Tire Pressure Warning System: Tire Pressure Monitor Receiver Communication Stop (B1247)
    DESCRIPTION The main body ECU (multiplex network body ECU) and tire pressure warning ECU and receiver are connected using 2 direct lines that they use to communicate with each other. DTC No. Detection Item DTC Detection Condition Trouble Area ...

    Toyota CH-R Service Manual > Wiper And Washer System: Data List / Active Test
    DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may ...

    © 2017-2020 Copyright www.tochr.net
    0.0159