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Home >> Suzuki >> 1990 >> Swift GL, 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Fuel System >> Fuel Delivery >> Fuel Pump Relay
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Fuel Pump Relay

Fuel pump relay is energized based upon ignition switch and RPM input. On Swift DOHC, ECM turns on fuel pump relay by providing a ground to fuel pump relay on ECM terminal B13. Power for fuel pump is supplied by EFI main relay, which receives its power from main fuse. EFI main relay is energized by ECM when the ignition is turned on. Fuel pump relay is energized through main relay from main fuse on Swift SOHC. When relay is energized, internal relay contacts close and fuel pump is activated.

Fig 1: Typical Fuel Pressure Regulator
G90J20213Courtesy of SUZUKI OF AMERICA CORP.