ANTI-LOCK BRAKE SYSTEM PRECAUTION


  1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL

    Note

    When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected Click here.

  2. IGNITION SWITCH EXPRESSION

    Tech Tips

    The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section.

    Expression Ignition Switch (Position) Engine Switch (Condition)
    Ignition Switch off LOCK Off (Lock)
    Ignition Switch ACC ACC On (ACC)
    Ignition Switch ON ON On (IG)
    Engine Start START On (Start)

  3. TROUBLESHOOTING PRECAUTION

    Tech Tips

    The anti-lock brake system includes the ABS and BA Click here.

    Note


    • When there is a malfunction in the terminal contact points or installation problems with parts, removing and installing the suspected problem parts may return the system to normal, either completely or temporarily.

    • In order to determine the malfunctioning area, be sure to check the conditions at the time the malfunction occurred, such as by the DTC output and the freeze frame data output, and record it, before disconnecting each connector or removing and installing pats.

    • Be sure to remove and install the brake actuator and each individual sensor with the ignition switch off unless specified otherwise in the inspection procedure.

    • When removing and installing the brake actuator and each individual sensor, be sure to check that the normal display is output in Test Mode inspection and DTC output inspection after installing all the parts.

  4. CAN COMMUNICATION SYSTEM PRECAUTIONS


    1. The CAN communication system is used for data communication among the skid control ECU (brake actuator assembly) and other ECUs. If there is trouble in the CAN communication line, corresponding communication line DTCs are output.

    2. If any CAN communication line DTC is output, repair the malfunction in the communication line and troubleshoot the ABS system after data communication becomes normal.

    3. In order to enable CAN communication, a specific type of wiring is used for the CAN communication lines. The wiring used for each communication line is a twisted pair of wires of equal length. A bypass wire should not be used because the data being transmitted will be corrupted.