Toyota Yaris: Vehicle Stability Control System / Brake Warning Light does not Come ON

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Brake / Brake Control / Dynamic Control Systems / Vehicle Stability Control System / Brake Warning Light does not Come ON

DESCRIPTION

The skid control ECU (brake actuator assembly) controls the brake system warning light in the combination meter assembly via CAN communication.

CAUTION / NOTICE / HINT

NOTICE:

After replacing the skid control ECU (brake actuator assembly), perform "Calibration".

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PROCEDURE

1.

CHECK GTS OUTPUT (CAN COMMUNICATION SYSTEM)

(a) Operate the GTS, and check for DTCs related to the CAN communication system.

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Result

Proceed to

Any CAN communication system relating DTCs are output

A

None of the above conditions are met

B

A

INSPECT CAN COMMUNICATION SYSTEM

B

2.

INSPECT COMBINATION METER ASSEMBLY

(a) Perform the Active Test of the combination meter assembly using the GTS.

Body Electrical > Combination Meter > Active Test

Tester Display

Brake Warning

(b) Check the combination meter assembly.

OK:

The brake system warning light turns on or off in accordance with the GTS operation.

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

INSPECT METER / GAUGE SYSTEM

    Brake Warning Light Remains ON

    DESCRIPTION This procedure is for troubleshooting when the brake system warning light remains on but no DTCs are output. The skid control ECU (brake actuator assembly) controls the brake system warning light in the combination meter assembly via CAN communication...

    Slip Indicator Light Remains ON

    DESCRIPTION This procedure is for troubleshooting when the slip indicator light remains on but no DTCs are output. The skid control ECU (brake actuator assembly) controls the slip indicator light in the combination meter assembly via CAN communication...

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