T100 Pickup 4WD V6-180.5 2959cc 3.0L SOHC (3VZ-E) (1993)
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EFI Main Relay: Description and Operation
PURPOSE
The Electronic Fuel Injection Main Relay serves as a source of battery power for several components including the Circuit Opening Relay, (which
powers the Fuel Pump), and the Engine Control Module (ECM).
OPERATION
The main relay is energized by a signal from the Ignition Switch. It then supplies battery current from the EFI fuse to the ECM and other
components.
