STEERING LOCK SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Steering Lock Actuator or UPR Bracket Assembly Steering Lock ECU Receives the steering wheel unlock/lock request signal from the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU), and activates the steering lock motor.
    Certification ECU (Smart Key ECU Assembly)

    • Detects the engine switch (push start switch) condition.

    • Certifies the electrical key transmitter sub-assembly.

    • Sends steering lock motor drive permission signals to the steering lock ECU.
    ID Code Box (Immobiliser Code ECU) Sends each set/unset request signal to the steering lock ECU.
    Shift Control ECU

    • Outputs the shift position signal.

    • Outputs the lock/unlock signal of parking lock mechanism.
    Combination Meter Assembly Multi-information Display Displays a warning message to inform the driver of a malfunction in the electrical steering lock system.
    Master Warning Light Illuminates when the warning message is displayed on the multi-information display.
    Buzzer Sounds to warn the driver of a malfunction in the system.

  2. FUNCTION


    1. The steering lock actuator or UPR bracket assembly is integrated into the steering lock ECU, and the ECU controls the lock bar operation in the steering lock actuator or UPR bracket assembly through the control of the steering lock motor.

    2. The steering lock ECU detects the position (lock/unlock) of the lock bar and transmits this information to the ID code box (immobiliser code ECU) and certification ECU (smart key ECU assembly).

    3. In this system, the certification ECU (smart key ECU assembly) determines whether to lock or unlock the steering based on communication with the ID code box (immobiliser code ECU). Then, the certification ECU (smart key ECU assembly) sends lock or unlock command signals to the steering lock ECU via LIN communication. Upon receiving the signals, the steering lock ECU operates the steering lock motor to lock or unlock the steering.

      Tech Tips

      It is not possible to replace only the steering lock ECU in the steering lock actuator or UPR bracket assembly. Therefore, if the ECU is malfunctioning, the entire steering lock assembly must be replaced.