ELECTRONICALLY CONTROLLED BRAKE SYSTEM Brake Control Warning Light Remains ON

DESCRIPTION

If the ECU stores a DTC, the brake warning light / yellow (minor malfunction) comes on in the combination meter.

The skid control ECU is connected to the No. 1 meter ECU via CAN communication.

WIRING DIAGRAM

A01GYEVE08

INSPECTION PROCEDURE

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

    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

  2. INSPECT IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED


    1. Check the skid control ECU connector's connection.

      OK
      The connector is securely connected.

    NG

    CONNECT CONNECTOR TO ECU CORRECTLY

    OK

  3. INSPECT BATTERY


    1. Check the battery voltage.

      Standard voltage
      11 to 14 V

    NG

    RECHARGE OR REPLACE BATTERY Click here

    OK

  4. 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.

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

    B

    REPLACE SKID CONTROL ECU Click here

    C

    REPLACE SKID CONTROL ECU Click here

    A

    REPLACE NO. 1 METER ECU SUB-ASSEMBLY Click here