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

WIRING DIAGRAM

Refer to Brake Control Warning Light Remains ON Click here.

INSPECTION PROCEDURE

Note

When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration Click here.

PROCEDURE


  1. INSPECT CAN COMMUNICATION SYSTEM


    1. for LHD:

      Check if the CAN communication system DTC is output Click here.

      for RHD:

      Check if the CAN communication system DTC is output Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output (for LHD) B
      DTC is output (for RHD) C

    B

    GO TO CAN COMMUNICATION SYSTEM (for LHD) Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (for RHD) Click here

    A

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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Select the ABS/VSC/TRAC "Warning Light" in the Active Test and operate the brake control (electronically controlled brake system/VSC) warning light by the intelligent tester.

      Skid control ECU:
      Tester Display

      Vehicle Condition/

      Test Details

      		 Control Range Diagnostic Note
      Electronically Controlled Brake System Warning Light Turns brake control warning light / yellow (minor malfunction) ON / OFF Observe combination meter

    4. Check that "ON" and "OFF" of the brake (electronically controlled brake system/VSC) warning lights / yellow (minor malfunction) are indicated on the combination meter when using the intelligent tester.

      OK
      The brake (electronically controlled brake system/VSC) warning light / yellow (minor malfunction) turn on or off in accordance with the intelligent tester.

      Tech Tips

      If troubleshooting has been carried out according to the PROBLEM SYMPTOMS TABLE, refer back to the table and proceed to the next step before replacing the part Click here.

      Result
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    B

    REPLACE SKID CONTROL ECU (for LHD) Click here

    C

    REPLACE SKID CONTROL ECU (for RHD) Click here

    A

  3. INSPECT COMBINATION METER ASSEMBLY


    1. Check the combination meter Click here.

      Tech Tips

      If troubleshooting has been carried out according to the "PROBLEM SYMPTOMS TABLE", refer back to the table and proceed to the next step before replacing the part Click here.


    NG

    REPLACE NO. 1 METER ECU SUB-ASSEMBLY Click here

    OK

    END