ACTIVE NOISE CONTROL SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Stereo Component Equalizer Assembly

    • Calculates the frequency of electronic control sounds and engine order component sound based on the vehicle speed, accelerator pedal depression amount, engine speed, generated torque and driving mode signals.

    • Generates the output sound quality based on the calculated frequency information and sends it to the stereo component amplifier assembly.
    Active Noise Control Microphone (Front RH) Detects muffled sounds in the cabin and sends signals to the stereo component equalizer assembly.
    Active Noise Control Microphone (Front LH)
    Active Noise Control Microphone (Rear)
    Stereo Component Amplifier Assembly Generates electronic control sounds and engine order component sound based on signals from the stereo component amplifier assembly.
    Front No. 1 Speaker Assembly Generates electronic control sounds and engine order component sound based on signals from the stereo component amplifier assembly.
    Rear No.3 Speaker Assembly
    Radio Receiver Assembly Sends audio signals to the stereo component amplifier assembly.
    ECM

    • Outputs engine speed to the stereo component equalizer assembly via the direct line.

    • Sends the information such as the accelerator pedal depression amount, generated torque and drive mode to the stereo component equalizer assembly.
    Main Body ECU (Multiplex Network Body ECU)

    • Sends driver seat and front passenger seat power window state signals to the stereo component equalizer assembly.

    • Outputs courtesy light switch signals to the stereo component equalizer assembly.
    Skid Control ECU Sends vehicle speed signals to the stereo component equalizer assembly.
    Multi-display Controller Sub-assembly* Relays sent and received information via MOST communication.
    Central Gateway ECU (Network Gateway ECU) Relays the signal between the CAN communication lines.
    DLC3 Can read the Diagnostic Trouble Codes (DTCs) of malfunctions by connecting the Global TechStream (GTS).

    *: Models with rear seat entertainment system

  2. SYSTEM CONTROL


    1. ANC Function


      1. Based on the muffled sounds in the cabin detected by each active noise microphone and the vehicle condition signals from each ECU, the stereo component equalizer assembly calculates the control signals corresponding to respective speakers in the front No. 1 speaker assembly (RH), front No. 1 speaker assembly (LH) and rear No. 3 speaker assembly, and then sends the signals to the 3 speakers through the stereo component amplifier assembly.

      2. The front No. 1 speaker assembly (RH), front No. 1 speaker assembly (LH) and rear No. 3 speaker assembly output electronic control sounds with an inverted phase to the muffled sounds, achieving muffled sound reduction.

    2. ESE Function


      1. Based on the vehicle condition signals from each ECU, the stereo component equalizer assembly calculates engine order component sound signals for the speakers in the front No. 1 speaker assembly (RH), front No. 1 speaker assembly (LH) and rear No. 3 speaker assembly and then outputs the signals to the 3 speakers through the stereo component amplifier assembly.

      2. The front No. 1 speaker assembly (RH), front No. 1 speaker assembly (LH) and rear No. 3 speaker assembly generate engine order component sound to create realistic engine sounds.

  3. DIAGNOSIS


    1. If a system malfunction is detected, the stereo component equalizer assembly stores Diagnostic Trouble Codes (DTCs) in its memory. For details, refer to the Repair Manual.