Fuel Pump Relay: Description and Operation

Fig. 25 Power Distribution Center (PDC):

FUEL PUMP RELAY - PCM OUTPUT
The fuel pump relay supplies battery voltage to the fuel pump. Power for the solenoid is supplied through a 10A fuse in the Junction Block. The contacts are supplied power through a 20A fuse in the PDC. Refer to Diagrams/Electrical 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 Fig. 25. The inside top of the PDC cover has a label showing relay and fuse location.

Fig. 1 ASD And Fuel Pump Relay Terminals: