ASC SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Stereo Component Equalizer Assembly

    • The stereo component equalizer assembly calculates the frequency of the output sound based on the vehicle speed, accelerator pedal depression angle, calculated engine rotation speed, generated torque, shift lever position, shift range and driving mode signals.

    • The stereo component equalizer assembly creates synthesized sounds which are output to the No. 1 speaker with box assembly through the power amplifier.
    Vehicle Sound Switch Turns off or adjusts the volume of the sound output from the No. 1 speaker with box assembly.
    No. 1 Speaker with Box Assembly Emits sounds based on the signal from the stereo component equalizer assembly. The No. 1 speaker output sound is reverberated in the box.
    ECM Outputs the acceleration pedal depression amount, engine speed, generated torque, shift lever position, shift range and driving mode information to the stereo component equalizer assembly.
    Acceleration Pedal Sensor Assembly Sends the accelerator pedal depression angle signal to the ECM.
    Paddle Shift Switch (Transmission Shift Switch Assembly)* Detects the paddle shift switch operation and transmits a signal to the ECM.
    Park/Neutral Positin Sensor Assembly Sends a shift lever position signal to the ECM.
    Integration Control and Panel Assembly Sends a drive mode selected signal to the ECM.
    Skid Control ECU Detects the signals from each speed sensor and outputs the vehicle speed signal to the ECM.
    Speed Sensor Detects the wheel speed of each of the 4 wheels.

    • *: Models with shift paddle

  2. OPERATING CONDITION


    1. The ASC system operates when the following conditions are met:


      1. The engine switch is on (IG).

      2. The driving mode is in NORMAL mode or SPORT (SPORT S/S+) mode.

      3. The vehicle sound switch indicator light is illuminated.

      4. The shift lever is in R, D or M.

      5. The vehicle speed is 6 km/h (4 mph) or higher.

    2. A lower volume output is performed when the driving mode is in NORMAL mode compared to SPORT (SPORT S/S+) mode.

    3. The ASC system stops the driving sound output when ECO mode is selected.*

      Tech Tips

      When the driving mode is changed from ECO mode to NORMAL mode or SPORT (SPORT S/S+) mode, the ASC system may not restart immediately, as the operation conditions are redetermined.

    4. The generated tone of the driving sound changes depending on the accelerator pedal depression amount.

      A01GGZFE01
      *1 Vehicle Speed
      *2 6 km/h (4 mph)
      *3 0 km/h (0 mph)
      *4 Driving sound generated

  3. SYSTEM CONTROL


    1. The ASC system outputs a driving sound when the vehicle is being driven in a mid-range or high speed range.

    2. When the shift lever is in D, the stereo component equalizer assembly outputs a driving sound based on the engine speed and shift range signals sent from the ECM.

    3. When shifting via shift paddle operation, the stereo component equalizer assembly creates and outputs a shifting noise due to shift change operation.

  4. DIAGNOSIS


    1. If the stereo component equalizer assembly detects a malfunction in the ASC system, Diagnostic Trouble Codes (DTCs) are stored in the stereo component equalizer assembly.


      1. The 5-digit DTCs can be read by connecting the Global TechStream (GTS) to the DLC3. For details, refer to the Repair Manual.