VEHICLE STABILITY CONTROL SYSTEM Brake Warning Light does not Come ON

DTC Code DTC Name
Brake Warning Light does not Come ON

DESCRIPTION

The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication.

CAUTION / NOTICE / HINT

Note:

  • When replacing the skid control ECU (brake actuator assembly), perform system variant learning and acceleration sensor zero point calibration.

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  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

  1. CHECK CAN COMMUNICATION SYSTEM

    1. Check if CAN communication system DTCs are output.

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    Result

    Result

    Proceed to

    DTCs are not output.

    A

    DTCs are output.

    B
    B

    INSPECT CAN COMMUNICATION SYSTEM

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    A

  2. PERFORM ACTIVE TEST USING GTS (BRAKE WARNING LIGHT)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Select the Active Test on the GTS.

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      Chassis > ABS/VSC/TRC > Active Test

      Tester Display

      Measurement Item

      Control Range

      Diagnostic Note

      Brake Warning Light

      Brake warning light

      Warning light ON/OFF

      Observed combination meter assembly

      Chassis > ABS/VSC/TRC > Active Test

      Tester Display

      Brake Warning Light

    4. Select the Data List on the GTS.

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      Chassis > ABS/VSC/TRC > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Brake Warning Light

      Brake warning light

      ON or OFF

      ON: Warning light on

      OFF: Warning light off

      -

      Chassis > ABS/VSC/TRC > Data List

      Tester Display

      Brake Warning Light

    5. Check the operating condition of the brake warning light when operating it using the GTS.

      Result

      Result

      Proceed to

      Brake Warning Light in the Data List does not change using the Active Test.

      A

      Brake Warning Light in the Data List turns ON/OFF using the Active Test.

      B
      Tip:

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts.

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    A

    REPLACE BRAKE ACTUATOR ASSEMBLY

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    B

  3. INSPECT COMBINATION METER ASSEMBLY

    1. Turn the ignition switch off.

    2. Perform an Active Test of the combination meter assembly using the GTS.

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      Body Electrical > Combination Meter > Active Test

      Tester Display

      Indicat. Lamp Brake

    3. Check the combination meter assembly.

      OK

      The brake warning light turns on or off in accordance with the Active Test operation.

      Tip:

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts.

      Click hereClick here

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY

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    NG

    INSPECT METER / GAUGE SYSTEM

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