Fuel Pump Control Circuit [06/2016 - 03/2017]: Description

The fuel pump circuit (low pressure side) is comprised of the ECM, fuel pump assembly (low pressure side), and fuel pump control ECU assembly (which operates the fuel pump [low pressure side]). The ECM judges the speed of the fuel pump assembly (low pressure side) based on the engine output. This speed is converted into a loading signal, which is sent to the fuel pump control ECU assembly. The fuel pump control ECU assembly adjusts the fuel pump operating speed (low pressure side), based on the signal sent from the ECM.