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Home >> Acura >> 2007 >> RL >> Repair and Diagnosis >> External Pages >> Different car >> Section 23 (Fuel And Emissions Systems) >> System Description >> Fuel Supply System >> Fuel Pump Control (J35A8 engine}

Fuel Pump Control (J35A8 engine}

WARNING: This page is about a different car, the 2008 Acura TL and 2007 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.

When the ignition switch is turned on, the ECM/PCM grounds PGM-FI main relay 2 which feeds current to the fuel pump control module. The ECM/PCM sends a signal to the fuel pump control module to operate the fuel pump for 2 seconds to pressurize the fuel system. With the engine running, the fuel pump speed is controlled in four levels by the fuel pump control module. The ECM/PCM decides the fuel pump speed by the calculation of the injector activation time and engine speed and sends an operation command signal to the fuel pump control module. This operation makes it possible to decrease fuel pump noise at low engine speed.

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