Neon L4-2.0L VIN C (1998)
Fuel Pump Relay: Description and Operation
Fuel Pump Relay Operation
FUEL PUMP RELAY-PCM OUTPUT
The fuel pump relay supplies battery voltage to the fuel pump. A buss bar in the Power Distribution Center (PDC) supplies voltage to the solenoid
side and contact side of the relay. The fuel pump relay power circuit contains a 20 amp fuse between the buss bar in the PDC and the relay. The
fuse also protects the power circuit for the Automatic Shutdown (ASD) relay. The fuse is located in the PDC. Refer to Diagrams for circuit
information.
The PCM controls the fuel pump relay by switching the ground path for the solenoid 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 after approximately one second.
The fuel pump relay is located in the PDC. The inside top of the PDC cover has a label showing relay and fuse location.
