VEHICLE STABILITY CONTROL SYSTEM Brake Warning Light does not Come ON

DESCRIPTION

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

WIRING DIAGRAM

Refer to Brake Warning Light Remains ON Click here.

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if a CAN communication system DTC is output Click here.

      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    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 Click here.

      ABS/VSC/TRC
      Tester Display Test Part Control Range Diagnostic Note
      Brake Warning Light Brake warning light Warning light ON/OFF

      Can be observed on the combination meter assembly

      Vehicle condition: Vehicle stopped

    4. Select the Data List on the GTS Click here.

      ABS/VSC/TRC
      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

      		 -

    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

    B

    INSPECT COMBINATION METER ASSEMBLY Click here

    A

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

  3. INSPECT COMBINATION METER ASSEMBLY


    1. Turn the ignition switch off.

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

    3. Check the combination meter assembly.

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

    NG

    INSPECT METER / GAUGE SYSTEM Click here

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here