EFI Main Relay

EFI Main Relay:

The EFI Main Relay, located on the RH side of the engine compartment, serves as a source of battery power for several components including the Circuit Opening Relay, (which powers the Fuel Pump), the Fuel Pressure Up VSV and the ECU. The EFI Main Relay is supplied battery current through the EFI fuse and is energized by a signal from the M-REL terminal of the ECU. The ECU receives relay input at terminals +B and +B1.