Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Brake Warning Light (Yellow) Remains On

Toyota Corolla Cross (2022-2026) Service Manual / Brake / Parking Brake / Electric Parking Brake System (for Gasoline Model) / Brake Warning Light (Yellow) Remains On

DESCRIPTION

This procedure is for troubleshooting when the brake system warning light (yellow indicator) remains on but no DTCs are output.

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

CAUTION / NOTICE / HINT

NOTICE:

  • The electric parking brake may still operate up to 20 seconds after the ignition switch is turned off. Before disconnecting connectors or fuses, turn the ignition switch off and wait 20 seconds or more.
  • After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.

    Click here

  • When replacing the skid control ECU (brake actuator assembly), operate the electric parking brake switch (electric parking brake switch assembly) as the parking brake indicator light (red) blinks when the ignition switch is first turned ON.

PROCEDURE

1.

CHECK VEHICLE CONTROL HISTORY (RoB) (ELECTRIC PARKING BRAKE SYSTEM)

(a) Using the GTS, check for Vehicle Control History (RoB).

Click here

Chassis > Brake/EPB > Utility

Tester Display

Vehicle Control History (RoB)

HINT:

If vehicle control history (RoB) is stored when the electric parking brake system is suspended, the brake system warning light (yellow indicator) illuminates.

Result

Proceed to

There is no vehicle control history (RoB) for when the electric parking brake system was suspended.

A

There is vehicle control history (RoB) for when the electric parking brake system was suspended.

B
B

PERFORM TROUBLESHOOTING AND REPAIR REGARDING VEHICLE CONTROL HISTORY (RoB)

NOTICE:

After performing troubleshooting and repair regarding vehicle control history (RoB), clear the vehicle control history (RoB).
A

2.

INSPECT COMBINATION METER ASSEMBLY (BRAKE SYSTEM WARNING LIGHT (YELLOW INDICATOR))

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

Click here

Body Electrical > Combination Meter > Active Test

Tester Display

ECB Warning

(b) Check the combination meter assembly.

OK:

The brake system warning light (yellow indicator) turns on or off in accordance with GTS operation.

OK

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

NG

INSPECT METER / GAUGE SYSTEM

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    DESCRIPTION The skid control ECU (brake actuator assembly) receives shift position signals from the TCM via CAN communication to control the electric parking brake system AUTO function (shift-lin

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     Precaution

    PRECAUTION TROUBLESHOOTING PRECAUTIONS (a) When inspecting the rear brakes, disconnect the connector or disconnect the cable from the negative (-) auxiliary battery terminal in order to shut off

    SEE MORE:

     Parts Location

    PARTS LOCATION ILLUSTRATION *A w/ Power Back Door System - - *1 FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH *2 FRONT DOOR LOCK WITH MOTOR ASSEMBLY RH *3 REAR DOOR LOCK WITH MOTOR ASSEMBLY LH *4 REAR DOOR LOCK WITH MOTOR ASSEMBLY RH *5 FRON

     Dtc Check / Clear

    DTC CHECK / CLEAR DTC CHECK (a) Turn the ignition switch off. (b) Connect the GTS to the DLC3. (c) Turn the ignition switch to ON. (d) Turn the GTS on. (e) Read the DTCs following the prompts on the GTS. Chassis > Brake/EPB > Trouble Codes (f) Check the details of the DTCs. NOTICE:

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