ELECTRONICALLY CONTROLLED BRAKE SYSTEM Brake Warning Light does not Come ON

WIRING DIAGRAM

Refer to Brake Warning Light Remains ON Click here.

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 BRAKE WARNING LIGHT / RED (MALFUNCTION)


    1. Disconnect the skid control ECU connector.

    2. Turn the power switch ON (IG).

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

      OK
      Brake warning light / red (malfunction) comes on.

      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

  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.


    NG

    REPLACE NO. 1 METER ECU SUB-ASSEMBLY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here