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Home >> Toyota >> 1994 >> Corolla Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Fuel System >> Fuel Pump Control Circuit >> Circuit Opening Relay

Circuit Opening Relay

Circuit opening relay controls fuel pump circuit. When engine is cranking, circuit opening relay receives a start signal.

Start signal energizes circuit opening relay during cranking. Circuit opening relay then provides voltage to fuel pump.

Circuit opening relay is grounded by ECM through the FC terminal.

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