Operation

OPERATION

The Fuel Pump Relay supplies battery voltage to the Fuel Pump. The Fuel Pump Relay power circuit contains a fuse. The fuse is located in the Relay Control Module. Refer to the Wiring Diagrams for circuit information.

The PCM controls the Fuel Pump Relay by switching the ground path for the coil side of the relay on and off. The PCM turns the ground path off when the ignition switch is in the OFF position. When the ignition switch is in the ON position, the PCM energizes the Fuel Pump. If the Crankshaft Position Sensor does not detect engine rotation, the PCM de-energizes the relay.