Brake Actuator Operation Sound is Loud during Initial Check [12/2019 - ]: Procedure

1. After turning the ignition switch to ON, compare the operating sound of the brake actuator the first time the vehicle speed reaches approximately 10 km/h (6 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 6 km/h (4 mph), the initial check of the brake actuator assembly is performed and pump motor operation sounds are generated.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

See step  2

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

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE BRAKE ACTUATOR BRACKET CUSHION 

Result: 

OK 

See step  3

1. Drain the brake fluid.
2. Disconnect all brake lines from the brake actuator assembly.

   Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

3. Connect each brake line so that the cushion of the brake actuator assembly is tensioned evenly.

   Refer to INSTALLATION [12/2019 - 10/2022] , or refer to INSTALLATION [10/2022 - 11/2023] , or refer to INSTALLATION [11/2023 - ]

   NOTE:

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

   Refer to BLEEDING [12/2019 - 10/2022] , or refer to BLEEDING [10/2022 - ]

   HINT: 

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

4. Check that no brake lines interfere with the vehicle body or other components.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. 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.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023]  , or refer to  REMOVAL [11/2023 - ]