ELECTRONICALLY CONTROLLED BRAKE SYSTEM > Brake Control Warning Light Remains ON

for Preparation Click here


DESCRIPTION

If the ECU stores a DTC, the brake control warning light comes on in the combination meter.
The skid control ECU is connected to the combination meter via CAN and multiplex communications.

WIRING DIAGRAM


C112009E05


INSPECTION PROCEDURE

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

1.INSPECT CAN COMMUNICATION SYSTEM

  1. Check if the CAN communication system DTC is output (Click here for LHD, for Click here RHD).

    Result:

    Condition
    		Proceed To
    DTC is not output
    		A
    DTC is output
    		B



B
REPAIR CAN COMMUNICATION SYSTEM
A


2.INSPECT MULTIPLEX COMMUNICATION SYSTEM

  1. Check if the multiplex communication system DTC is output (Click here).

    Result:

    Condition
    		Proceed To
    DTC is not output
    		A
    DTC is output
    		B



B
REPAIR MULTIPLEX COMMUNICATION SYSTEM
A


3.INSPECT IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

  1. Check the skid control ECU connector's connecting condition.

    OK:
    The connector should be securely connected.



NG
CONNECT CONNECTOR TO ECU CORRECTLY
OK


4.INSPECT BATTERY

  1. Check the battery voltage.

    Voltage:
    11 to 14 V



NG
INSPECT CHARGING SYSTEM
OK


5.INSPECT COMBINATION METER ASSEMBLY

  1. Check the combination meter assembly (Click here).

    HINT:
    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 COMBINATION METER ASSEMBLY
OK

REPLACE SKID CONTROL ECU