Fuel Pump Relay: Description and Operation

Instrument Panel Electrical Components:

PURPOSE
Controls fuel pump operation.

LOCATION
Under the L.H. side of the dash, next to the ECU.

OPERATION
The EFC System control unit provides the power supply and ground circuit to operate the fuel pump relay. When the ignition is switched "ON" with the engine not running, the control unit energizes the relay, thereby operating the fuel pump. After 3 seconds, the control unit shuts off power to the relay unless it receives the crank angle signal (engine cranking or running). A faulty fuel pump relay does not set a trouble code.