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 assembly via CAN communication.

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information Click here.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication system DTCs are output (See page for with Central Gateway ECU, Click here for without Central Gateway ECU).

      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output (w/ Central Gateway ECU). B
      DTCs are output (w/o Central Gateway ECU). C

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    C

    INSPECT CAN COMMUNICATION SYSTEM Click here

    A

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


    1. Turn the engine switch off.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Select the Active Test on the GTS.

    5. According to the display on the GTS, perform the Active Test.

      ABS/VSC/TRC
      Tester Display Measurement Item Control Range Diagnostic Note
      Brake Warning Light Brake warning light Warning light ON/OFF Can be observed on the combination meter assembly

    6. When performing the Brake Warning Light Active Test, check Brake Warning Light in the Data List.

      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

      		 -
      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

      Tech Tips

      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 here.


    A

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    B

  3. INSPECT COMBINATION METER ASSEMBLY


    1. Turn the engine switch off.

    2. Perform 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 GTS.

      Tech Tips

      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 here.


    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    NG

    INSPECT METER / GAUGE SYSTEM Click here