BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System): UTILITY; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [03/2019

(a) Refer to the table below and then perform the necessary operation according to the part to be replaced in order to perform calibration.

ACCELERATION SENSOR ZERO POINT CALIBRATION AND STORE SYSTEM INFORMATION MEMORIZATION

NOTICE:

After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.
After replacing or reinstalling the yaw rate and acceleration sensor (airbag sensor assembly), perform acceleration sensor zero point calibration and store system information memorization after performing "Reset Memory".
As the acceleration sensor zero point cannot be stored again until the current zero point is cleared, perform "Reset Memory" and acceleration sensor zero point calibration and store system information memorization after replacing or removing and installing the yaw rate and acceleration sensor (airbag sensor assembly).
While obtaining the zero point, keep the vehicle stationary and do not vibrate, tilt, move, or shake it.
Be sure to perform this procedure on a level surface (with an inclination of less than 0.45 degrees).
While obtaining the zero point, make sure the tire pressure is as specified and the vehicle is in full contact with the ground (not lifted up or loaded).

When entering Dealer Mode (Calibration), the skid control ECU (brake actuator assembly) communicates with the forward recognition camera to judge whether the vehicle is equipped with the pre-collision system. Therefore, do not exit Dealer Mode (Calibration) within 5 seconds of entering Dealer Mode (Calibration) (w/ Pre-collision System).

(8) Select the skid control ECU (brake actuator assembly) to clear the zero point calibration data using the Techstream. Enter the following menus: Chassis / Brake / Utility / Reset Memory.

Chassis > Brake > Utility

After perform "Reset Memory", the ABS warning light, brake warning light / red (malfunction) and slip indicator light illuminate. If the vehicle is driven with the memory cleared, DTCs C124A00 and C051D54 will be stored.

(b) Perform acceleration sensor zero point calibration and store system information memorization.

HINT:

Acceleration sensor zero point calibration and store system information memorization are automatically performed immediately after Dealer Mode (Calibration) is entered.
If store system information memorization has not yet been performed, the slip indicator light will remain on and DTC C124A00 will be stored.
If acceleration sensor zero point calibration is not successful, the slip indicator light will remain on and DTC C051D54 will be stored.

(9) Switch the skid control ECU (brake actuator assembly) to calibration using the Techstream. Enter the following menus: Chassis / Brake / Utility / Calibration.

Chassis > Brake > Utility

(10) Using the Techstream, perform "Calibration" and enter Dealer Mode (Calibration).

(11) Confirm that the ABS warning light and slip indicator light indicate the Dealer Mode pattern (blinking at 0.25 seconds intervals).

HINT:

After "Calibration" has successfully completed, the ABS warning light and slip indicator light indicate the Dealer Mode pattern (blinking at 0.25 seconds intervals).
The slip indicator light may illuminate for approximately 7 seconds before learning successfully completes.
Do not exit Dealer Mode (Calibration) within 5 seconds of entering Dealer Mode (Calibration). If Dealer Mode (Calibration) is exited within 5 seconds of entering Dealer Mode (Calibration), DTC U023A87 may be stored. If DTC U023A87 is output after exiting Dealer Mode (Calibration), enter Dealer Mode (Calibration) again, wait at least 5 seconds, then recheck for DTCs (w/ Pre-collision System).

HINT:

With "All Readiness", you can check whether or not the DTC judgment has been completed by using the Techstream.
You should check "All Readiness" after simulating malfunction symptoms or for validation after finishing repairs.

(e) Clear the DTCs even if no DTCs are stored. Enter the following menus: Chassis / Brake / Trouble Codes.

Chassis > Brake > Clear DTCs

Chassis > Brake > Utility

If the judgment result shows Incomplete or N/A, perform the DTC confirmation driving pattern again.

When testing with a 2-wheel drum tester such as speedometer tester, combination tester for the speedometer and brakes, or chassis dynamometer, or when jacking up the front wheels and turning the wheels, perform the following procedure to enter Inspection Mode and disable the TRAC and VSC systems.

CAUTION:

Do not use the drum tester with any of the lock chains disconnected.
Using the drum tester with a lock chain disconnected could cause the vehicle to begin moving unexpectedly.
Do not use the drum tester while the TRAC or VSC is able to operate.
TRAC or VSC operation could cause the vehicle to begin moving unexpectedly.

NOTICE:

Inspection Mode will be canceled when the ignition switch is turned off. Make sure to enter Inspection Mode again if the inspection is continued after the ignition switch is turned off.
Never drive the vehicle while in Inspection Mode.

Chassis > Brake > Utility

(6) Check that the VSC OFF indicator light comes on and "Traction Control Turned Off" is displayed on the multi-information display (Confirm that the system has entered Inspection Mode).

If the ignition switch is turned to ON within 60 seconds of being turned off, the system will reenter Inspection Mode.

(2) Confirm that the VSC OFF indicator light turns off and the "Traction Control Turned Off" on the multi-information display is cleared (Confirm that Inspection Mode is canceled).

CAUTION:

Do not use the drum tester with any of the lock chains disconnected.
Using the drum tester with a lock chain disconnected could cause the vehicle to begin moving unexpectedly.
Do not use the drum tester while the TRAC or VSC is able to operate.
TRAC or VSC operation could cause the vehicle to begin moving unexpectedly.

NOTICE:

Inspection Mode will be canceled when the ignition switch is turned off. Make sure to enter Inspection Mode again if the inspection is continued after the ignition switch is turned off.
Never drive the vehicle while in Inspection Mode.

(2) Ensure that the ignition switch is off and the engine is stopped (Step "A").

(4) Make sure that the shift lever is in P (for continuously variable transaxle) (Step "C").

(5) Make sure that the shift lever is in neutral (for manual transaxle) (Step "C").

(8) While holding the brake pedal down, release and apply the parking brake twice (Step "F").

(9) With the parking brake applied, depress and release the brake pedal twice (Step "G").

(10) Check that the VSC OFF indicator light comes on and "Traction Control Turned Off" is displayed on the multi-information display (Step "H").

If the VSC OFF indicator light does not come on and "Traction Control Turned Off" is not displayed on the multi-information display in step "H", repeat steps "A" to "H".

If the ignition switch is turned to ON within 60 seconds of being turned off, the system will reenter Inspection Mode.

(2) Confirm that the VSC OFF indicator light turns off and the "Traction Control Turned Off" on the multi-information display is cleared (Confirm that Inspection Mode is canceled).