ELECTRONICALLY CONTROLLED BRAKE SYSTEM Brake Warning Light does not Come ON

DESCRIPTION

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

WIRING DIAGRAM

Refer to Brake Warning Light Remains ON Click here.

CAUTION / NOTICE / HINT

Note

When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve 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 BRAKE WARNING LIGHT / RED (MALFUNCTION)


    1. Disconnect the skid control ECU connector.

    2. Turn the power switch on (IG).

    3. Check that the brake warning light / red (malfunction) comes on.

      OK
      The brake warning light / red (malfunction) comes on.
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

      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.


    A

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Click here

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Click here

    C

  3. INSPECT COMBINATION METER


    1. Turn the power 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 / red (malfunction) turns on or off in accordance with the intelligent tester operation.
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

      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.


    A

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Click here

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Click here

    C

    REPLACE COMBINATION METER Click here