BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR (for HV Model): REMOVAL; 2023 - 2025 MY Corolla Corolla HV [09/2022

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM10000000265ZU
Model Year Start: 2023	Model: Corolla	Prod Date Range: [09/2022 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR (for HV Model): REMOVAL; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ]

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 brake actuator assembly removal/installation are shown below.

Replaced Part	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed
Skid control ECU (brake actuator assembly)	Update ECU security key	Vehicle Control History (RoB) are stored
	Bleed air Perform "Reset Memory" Perform "Calibration"	DTCs are stored ABS warning light illuminates Brake system warning light (yellow indicator) illuminates Slip indicator light illuminates Electronically controlled brake system disabled or malfunctions
	Operate the electric parking brake switch	Electric Parking Brake System

NOTICE:

When replacing the auxiliary battery, use a new auxiliary battery of the same dimensions and same capacity or more from the same class at a 20-hour rate.
After the ignition switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the ignition switch off, make sure to wait at least 3 minutes before disconnecting the cable from the negative (-) auxiliary battery terminal.
When the cable is disconnected from the negative (-) auxiliary battery terminal and the security lock setting has been enabled, multi-display operations will be disabled upon next startup unless the password is entered. Be sure to check the security lock setting before disconnecting the cable from the negative (-) auxiliary battery terminal. (for Audio and Visual System (for Single Knob Type))

HINT:

When the cable is disconnected / reconnected to the auxiliary battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
Front Camera System	Drive the vehicle straight ahead at 15 km/h (9 mph) or more for 1 second or more.

PROCEDURE

1. PRECAUTION

NOTICE:

After turning the ignition 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.

2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

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3. DRAIN BRAKE FLUID

NOTICE:

If brake fluid leaks onto any painted surface, immediately wash it off.

4. REMOVE WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY

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5. REMOVE NO. 1 HEATER AIR DUCT SPLASH SHIELD SEAL

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6. REMOVE OUTER COWL TOP PANEL SUB-ASSEMBLY

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7. REMOVE BRAKE ACTUATOR WITH BRACKET

(a) Release the lock lever and disconnect the connector from the brake actuator assembly.

	Release the lock lever
	Disconnect the connector

NOTICE:

Be careful not to allow any brake fluid to enter the connector.

(b) Use tags or make a memo to identify the places to reconnect the brake lines.

*a	From 1st Chamber of Brake Master Cylinder Sub-assembly
*b	From 2nd Chamber of Brake Master Cylinder Sub-assembly
*c	To Front Wheel Cylinder Assembly RH
*d	To Rear Wheel Cylinder Assembly LH
*e	To Rear Wheel Cylinder Assembly RH
*f	To Front Wheel Cylinder Assembly LH

NOTICE:

Do not kink or damage the brake lines.
Do not allow any foreign matter such as dirt or dust to enter the brake lines from the connecting parts.

(d) Disengage the 5 clamps to remove the No. 1 brake tube clamp from the brake lines.

NOTICE:

Do not kink or damage the brake lines.

(e) Remove the 2 nuts.

NOTICE:

Do not kink or damage the brake lines.
Do not allow any foreign matter such as dirt or dust to enter the brake lines from the connecting parts.
Be careful not to allow any brake fluid to enter the connector.
Do not hold the brake actuator assembly by the connector.
Do not drop the brake actuator with bracket when carrying it.

HINT:

Remove the brake actuator with bracket while avoiding the brake lines.

8. REMOVE BRAKE ACTUATOR ASSEMBLY

(a) Remove the 3 bolts and brake actuator assembly from the brake actuator bracket assembly.

NOTICE:

Do not hold the brake actuator assembly by the connector.
Be careful not to allow any brake fluid to enter the connector.
Do not drop the brake actuator assembly when carrying it.

9. REMOVE BRAKE ACTUATOR BRACKET CUSHION

(a) Remove the 3 nuts and separate the brake actuator bracket assembly.

*1	Brake Actuator Bracket Cushion
*2	No. 1 Brake Actuator Case Collar
*3	Brake Actuator Bracket Assembly

(b) Remove the 3 No. 1 brake actuator case collars from the brake actuator bracket cushion.