VEHICLE STABILITY CONTROL SYSTEM Brake Warning Light does not Come ON

DESCRIPTION

The skid control ECU is connected to the combination meter via the CAN and multiplex communication systems.

WIRING DIAGRAM

Refer to Brake Warning Light Remains ON Click here.

INSPECTION PROCEDURE

Note

When replacing the brake actuator assembly, perform zero point calibration and store system information Click here.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


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

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK MULTIPLEX COMMUNICATION SYSTEM


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

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    INSPECT MULTIPLEX COMMUNICATION SYSTEM Click here

    A

  3. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (BRAKE WARNING LIGHT)


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine.

    3. Select the Active Test on the intelligent tester Click here.

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

    4. Check that the brake warning light on the combination meter turns on or off in accordance with the intelligent tester operation.

      OK
      The brake warning light turns on or off in accordance with the intelligent tester operation.

      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 the part Click here.


    NG

    INSPECT COMBINATION METER ASSEMBLY Click here

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

  4. INSPECT COMBINATION METER ASSEMBLY


    1. Turn the engine switch off.

    2. Reconnect the skid control ECU connector.

    3. Perform the Active Test of the combination meter (meter CPU) using the intelligent tester Click here.

    4. Check the combination meter.

      OK
      The brake warning light turns on or off in accordance with the intelligent tester operation.

      Tech Tips

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


    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here