VEHICLE STABILITY CONTROL SYSTEM(for Hydraulic Brake Booster) 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.

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (master cylinder solenoid), perform zero point calibration and store the system information Click here.

PROCEDURE


  1. INSPECT BRAKE WARNING LIGHT


    1. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    2. Turn the ignition switch to ON.

    3. Check that the brake warning light comes on.

      OK
      Brake warning light comes on.
      Result
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    B

    REPLACE MASTER CYLINDER SOLENOID Click here

    C

    REPLACE MASTER CYLINDER SOLENOID Click here

    A

  2. CHECK CAN COMMUNICATION LINE


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. Select CAN Bus Check from the System Selection Menu screen and follow the prompts on the screen to inspect the CAN bus (w/ Central Gateway ECU: See page , w/o Central Gateway ECU: Click here.

      OK
      CAN Bus Check indicates no malfunctions in CAN communication.
      Result
      Result Proceed to
      OK A
      NG (w/ Central Gateway ECU) B
      NG (w/o Central Gateway ECU) C

    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

  3. PERFORM ACTIVE TEST USING GTS (INDICAT. LAMP BRAKE)


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON and the GTS on.

    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.

    5. Check the condition of the brake warning light by operating the GTS.

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      Indicat. Lamp Brake Brake Warning Light ON or OFF Perform the test with the vehicle stopped and engine idling.
      OK
      The warning light turns on when operating the GTS.

    OK

    CHECK FOR USE SIMULATION METHOD TO CHECK Click here

    NG

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