VEHICLE STABILITY CONTROL SYSTEM Brake Warning Light does not Come ON

DESCRIPTION

Refer to Brake Warning Light Remains ON Click here.

WIRING DIAGRAM

Refer to Brake Warning Light Remains ON Click here.

INSPECTION PROCEDURE

Note


  • After replacing the brake actuator assembly, perform calibration Click here.

  • Before disconnecting the connector, make sure that there are no problems with the connection.

  • After disconnecting the connector, make sure that the connector case and terminals are not deformed or corroded.

PROCEDURE


  1. CHECK BRAKE WARNING LIGHT


    1. Turn the ignition switch off.

    2. Disconnect the skid control ECU (brake actuator assembly) connector.

    3. Turn the ignition switch to ON.

    4. Check that the brake warning light comes on.

      OK
      The brake warning light comes on.
      Result
      Result Proceed to
      NG A
      OK for LHD B
      for RHD C

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

  2. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER AND PARKING BRAKE SWITCH)


    1. Turn the ignition switch off.

    2. Disconnect the skid control ECU (brake actuator assembly) connector.

    3. Disconnect the C25 combination meter connector.

    4. Disconnect the parking brake switch connector.

    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      S35-8 (BRL) - C25-26 Always Below 1 Ω
      S35-8 (BRL) - Body ground Always 10 kΩ or higher
      S35-29 (PKB) - P2-1 Always Below 1 Ω
      S35-29 (PKB) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Turn the ignition switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the intelligent tester on.

    5. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

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

    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: Brake warning light on

      OFF: Brake warning light off

      		 -
      Result
      Result Proceed to
      Data List Display Data List Display When Performing Active Test ON/OFF Operation
      ON Does not change between ON and OFF for LHD A
      Does not change between ON and OFF for RHD B
      Changes between ON and OFF C
      OFF Does not change between ON and OFF for LHD A
      Does not change between ON and OFF for RHD B
      Changes between ON and OFF C

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here