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Main Relay (Computer/Fuel System): Description and Operation
EFI Main Relay Schematic:
PURPOSE The
EFI main relay controls the ECU power supply.
LOCATION Located in the
relay box on the left side of the engine compartment.
OPERATION When the ignition switch is turned to the ON position, the relay coil is energized. When powered the relay contacts close, sending battery voltage to ECU terminals +B and +B1.
