•  The fuel pump speed control turns the fuel pump speed control relay on/off according to the required fuel amount, switching between two fuel pump speed levels.

•  Excess load on the fuel pump is reduced by control of the fuel pump speed. Due to this, reliability has been improved as well as an assured delivery of the optimum fuel injection time according to the engine conditions.

•  In addition, at warm engine start and cold engine start, the fuel pump speed control relay is turned on during cranking to improve startability.