ASC SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Stereo Component Equalizer Assembly

    • Receives signals, such as accelerator pedal opening angle, shift lever position, driving mode and drive force, from the ECM via CAN communication and creates simulated engine sounds.

    • Sends a simulated engine sound signal to the No. 1 speaker with box assembly and No. 2 speaker with box assembly.
    No. 1 Speaker with Box Assembly Outputs simulated engine sounds into the cabin according to the signal sent by the stereo component equalizer assembly.
    No. 2 Speaker with Box Assembly
    Integration Control and Panel Assembly ASC Switch Turns the ASC system on and off.
    ECM Sends signals, such as accelerator pedal opening angle, shift lever position, driving mode and drive force to the stereo component equalizer assembly via CAN communication.
    Brake Actuator Assembly Skid Control Computer Sends vehicle speed signals to the stereo component equalizer assembly via CAN communication.

  2. OPERATING CONDITION


    1. Additional engine sounds generation conditions

      Item Condition Remark
      Drive mode SPORT S mode SPORT S+ mode -
      Shift lever position R, D, M -
      Vehicle speed 6 km/h (4 mph) or more When all of the conditions are met, additional engine sounds are generated.
      Engine speed 980 rpm or more
      Sounding Speaker No. 2 Speaker with Box Assembly

      No. 1 Speaker with Box Assembly

      No. 2 Speaker with Box Assembly

      		 -
      A01XPORC01
      *a Example of additional engine sounds generation *b Vehicle speed
      *c Time *d Accelerating
      *e Decelerating *f When vehicle being driven
      *g 6 km/h (4 mph) *h 980 rpm or more
      *i Less than 980 rpm *j Sounds output

    2. Intake flow noise generation conditions

      Item Condition Remark
      Drive mode SPORT S mode SPORT S+ mode -
      Shift lever position - P, R, N, D, M -
      Vehicle speed - 0 km/h or more and 1 km/h or less, or more than 100 km/h and 250 km/h or less -
      Engine speed - Between 1300 rpm and 5000 rpm -
      Accelerator pedal opening angle -

      Opening angle range: Between 15% and 70%

      Condition: When the accelerator pedal opening angle increases 15% or more in 0.01 seconds

      		 To generate additional intake flow noise again, decrease the accelerator pedal opening angle to below 10%
      Sounding Speaker - No. 1 Speaker with Box Assembly -

    3. Exhaust pulsation sound generation conditions

      Item Condition Remark
      Drive mode SPORT S mode SPORT S+ mode -
      Shift lever position - D, M -
      Vehicle speed - 80 km/h or more -
      Gear - 3rd or less -
      Accelerator pedal opening angle - From 80% or more to 0% within 450 msec -
      Sounding Speaker - No. 2 Speaker with Box Assembly -

  3. SYSTEM CONTROL


    1. The following sounds are generated.

      Additional Engine Sounds

      • Specially designed engine sounds which are synchronized with the engine speed and output when the vehicle is being driven.

      • Generated when the vehicle speed is 6 km/h (4 mph) or more and engine speed is 980 rpm or more.
      Intake Flow Noise

      • Specially designed intake flow noise which is output when the throttle valve is opened rapidly and intake airflow increases.

      • Generated when the engine is running and the accelerator pedal is depressed rapidly.
      Exhaust Pulsation Sound

      • Specially designed exhaust pulsation sound which simulates the sound of unburned exhaust gases combusting in and around the exhaust pipe.

      • Generated when the vehicle is being driven with the accelerator pedal depressed, and the accelerator pedal is suddenly released.

  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 Techstream to the DLC3. For details, refer to the Repair Manual.