ELECTRONICALLY CONTROLLED BRAKE SYSTEM Brake Control Warning Light does not Come ON

DESCRIPTION

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

WIRING DIAGRAM

Refer to Brake Control Warning Light Remains ON Click here.

INSPECTION PROCEDURE

Note

When replacing the skid control ECU assembly, 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 (for LHD: Click here, for RHD: Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output (for LHD) B
      DTC is output (for RHD) 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 / YELLOW (MINOR MALFUNCTION))


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Select the Active Test on the GTS Click here.

      ABS/VSC/TRC
      Tester Display Test Part Control Range Diagnostic Note
      ECB* Warning Light Brake warning light / yellow (minor malfunction) Warning light ON/OFF Observe combination meter

      *: Electronically Controlled Brake System

    4. Check that the brake warning light / yellow (minor malfunction) on the combination meter assembly turns on or off in accordance with the GTS operation.

      OK
      The brake warning light / yellow (minor malfunction) turns on or off in accordance with the GTS 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 SKID CONTROL ECU ASSEMBLY Click here

  3. INSPECT COMBINATION METER ASSEMBLY


    1. Turn the power switch off.

    2. Perform the Active Test of the combination meter assembly (meter CPU) using the GTS Click here.

    3. Check the combination meter assembly.

      OK
      The brake warning light / yellow (minor malfunction) turns on or off in accordance with the GTS 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

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

    REPLACE SKID CONTROL ECU ASSEMBLY Click here