•  If there is a difference between the target idle speed and the actual idle speed, the PCM controls the fuel injection amount so that the actual idle speed corresponds to the target idle speed.

•  Controls engine speed based on the input signal from the engine coolant temperature sensor (below 0 °C {32 °F}) so that the engine speed while warming up corresponds to the target engine speed.

•  The PCM detects the engine speed fluctuation while idling and corrects the fuel injection amount per each cylinder. Due to this, the variance in fuel injection amount caused by ununiformity of the cylinders (such as fuel injectors) and engine vibration while idling are reduced.