Fuel Pump

The electric in-tank fuel pump is turned on by the ECU. Depending upon the system in use, either voltage or ground is supplied directly to the fuel pump. Fuel pump is activated when ECU supplies the missing voltage or ground signal through the fuel pump relay. See FUEL PUMP RELAY for appropriate models.

Depending on the system, fuel pump will be energized by the ECU for up to 5 seconds when ignition is first turned on, during cranking and running, and will be de-energized approximately one second after engine stops.