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03-23 0000-00 ENGINE CONTROL SYSTEM Engine ECU (D20DTF) 1. OVERVIEW The components in the fuel system supply fuel and generate high pressure to inject fuel to each injector. They are controlled by the engine ECU. The common rail fuel injection system consists of fuel tank, fuel line, low pressure line which supplies low pressure fuel to the low pressure pump (includes high pressure pump), high pressure line which connected to the injector and the engine control unit (ECU) which calculates the accelerator pedal position and controls the overall performance of vehicle based on the input signals from various sensors. HP fuel pump Common rail and Injector Fuel filter (Priming pump) Fuel supply tube Fuel return tube Fuel tank Fuel neck Fuel sender (main) Fuel sender (sub) Low pressure line High pressure line |