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

WIRING DIAGRAM

Refer to Brake Control Warning Light Remains ON Click here.

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU, perform the following operations:


  • Initialization of linear solenoid valve and calibration Click here

  • Yaw rate and acceleration sensor zero point 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
      for RHD C

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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power 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.

      ABS/VSC/TRC:
      Tester Display Test Part Control Range Diagnostic Note
      Electronically Controlled Brake System Warning Light Brake 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
      for RHD C

    B
    C
    A
  3. INSPECT COMBINATION METER ASSEMBLY


    1. Perform the meter and gauge system active test 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.


    OK
    NG