EFI Main Relay (4Runner 3.4L V6)
EFI main relay may also be referred to as EFI relay. EFI fuse supplies constant battery voltage to one side of EFI main relay. EFI main relay is energized by MREL terminal of Engine Control Module (ECM). When EFI main relay is energized, EFI main relay provides battery voltage to circuit opening relay, data link connector No. 1 and various other electrical components. EFI main relay also provides battery voltage to +B terminal of ECM. For EFI main relay location, see EFI MAIN RELAY LOCATION table.
EFI MAIN RELAY LOCATION
| Application | Location |
|---|---|
| Avalon, Camry & Camry Solara | In Fuse/Relay Box At Driver's Side Front Corner Of Engine Compartment, Near Battery & Air Cleaner |
| Celica, Corolla & ECHO | In Fuse/Relay Box At Driver's Side Front Corner Of Engine Compartment, Just In Front Of Strut Tower, Near Battery |
| Land Cruiser | In Fuse/Relay Box At Driver's Side Front Corner Of Engine Compartment, Near Battery |
| RAV4 | In Fuse/Relay Box Behind Driver's Side Of Instrument Panel, Next To Steering Column, Or In Fuse/Relay Box At Driver's Side Front Corner Of Engine Compartment, Near Strut Tower |
| Sienna | In Fuse/Relay Box At Driver's Side Front Corner Of Engine Compartment, Near Battery & Air Cleaner |
| Tacoma, Tundra & 4Runner | In Fuse/Relay Box At Driver's Side Front Corner Of Engine Compartment, Next To Battery |