SFI SYSTEM


  1. OPERATION


    1. The ECM drives the throttle control motor by determining the target throttle valve opening in accordance with the respective operating condition.

    2. The ECM controls the throttle to an optimal throttle valve opening that is appropriate for the driving conditions such as the amount of accelerator pedal effort and the engine speed in order to achieve excellent throttle control and comfort in all operating ranges.

      A01N5F9E12

    3. The ECM controls the throttle valve in order to constantly maintain an ideal idle speed.

    4. As part of the TRC, the throttle valve opening angle is reduced by a demand signal sent from the skid control ECU to the ECM. This demand signal is sent if an excessive amount of slippage occurs at a drive wheel, thus ensuring vehicle stability and applying an appropriate amount of power to the road.

    5. In order to bring the effectiveness of the VSC into full play, the throttle valve angle is regulated through a coordination control by the skid control ECU and the ECM.

    6. The ECM directly actuates the throttle valve for operation of the cruise control.

    7. On the models with dynamic radar cruise control system, the dynamic radar cruise control uses a millimeter wave radar sensor and driving support ECU to determine the distance, direction, and relative speed of a vehicle ahead. Thus, the system can effect deceleration control, follow-up control, constant speed control, and acceleration control. To make these controls possible, the ECM controls the throttle valve.