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Home >> Lexus >> 1997 >> LX 450 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Fuel System >> Fuel Pump Control Circuit >> EFI Main Relay

EFI Main Relay

The EFI fuse supplies constant battery voltage to EFI main relay. When EFI main relay is energized by MRLY terminal of Engine Control Module (ECM), the EFI main relay provides battery voltage to circuit opening relay, data link connector No. 1 and various other electrical components. The EFI main relay also provides battery voltage to +B terminal of ECM when ignition is turned on.

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