Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001G79M
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): Slip Indicator Light Remains ON; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

Slip Indicator Light Remains ON

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) is connected to the combination meter assembly via CAN communication.

If the skid control ECU (brake booster with master cylinder assembly) stores a DTC, the slip indicator light comes on in the combination meter assembly.

The slip indicator light blinks during ABS, VSC and/or TR(A)C operation.

When the system is malfunctioning, the slip indicator light comes on to warn the driver.

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): DIAGNOSIS SYSTEM

WIRING DIAGRAM

Refer to Brake Control Warning Light Remains ON.

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): Brake Control Warning Light Remains ON

CAUTION / NOTICE / HINT

NOTICE:

After replacing the skid control ECU (brake booster with master cylinder assembly), perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): INITIALIZATION

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if CAN communication system DTCs are output.

Click here 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

Result

Proceed to

DTCs are not output.

A

DTCs are output.

B
B

INSPECT CAN COMMUNICATION SYSTEM

A

2.

CHECK IF BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY CONNECTOR IS SECURELY CONNECTED

(a) Check if the skid control ECU (brake booster with master cylinder assembly) connector is securely connected.

OK:

The connector is securely connected.

NG

CONNECT CONNECTOR TO BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY CORRECTLY
OK

3.

CHECK AUXILIARY BATTERY

(a) Check the auxiliary battery voltage.

Standard Voltage:

Tester Connection

Condition

Specified Condition

Auxiliary battery

Power switch on (IG)

11 to 14 V

Auxiliary battery

Power switch on (READY)

11 to 15.5 V
NG

CHARGE OR REPLACE AUXILIARY BATTERY
OK

4.

READ VALUE USING TECHSTREAM (SLIP INDICATOR LIGHT)

(a) Select the Data List on the Techstream.

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): DATA LIST / ACTIVE TEST

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Slip Indicator Light

Slip indicator light

ON or OFF

ON: Indicator light on

OFF: Indicator light off

-

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Slip Indicator Light

(b) Check the Techstream display condition of the slip indicator light.

Result

Proceed to

ON is displayed.

A

OFF is displayed.

B
A

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

B

INSPECT METER / GAUGE SYSTEM