EFI Main Relay

NOTE: On Corolla, EFI main relay may also be referred to as EFI relay or F-HTR relay. On all other models, EFI main relay may also be referred to as EFI relay.

Ensure ignition is off. Remove EFI main relay. See EFI MAIN RELAY LOCATION table.

EFI MAIN RELAY LOCATION

Application	Location
Camry CNG & Gasoline Models, & Camry Solara	In Fuse/Relay Box At Driver-Side Front Corner Of Engine Compartment, Near Battery & Air Cleaner
Celica, Corolla & ECHO	In Fuse/Relay Box At Driver-Side Front Corner Of Engine Compartment, Just In Front Of Strut Tower, 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-Side Front Corner Of Engine Compartment, Near Strut Tower
Tacoma & 4Runner	In Fuse/Relay Box At Driver-Side Front Corner Of Engine Compartment, Next To Battery

To test EFI main relay continuity, using ohmmeter, check for continuity and no continuity between specified terminals on EFI main relay. See Fig 1-Fig 6 .
To test EFI main relay operation, apply battery voltage and ground to EFI main relay. Using ohmmeter, check for continuity between specified terminals on EFI main relay. See Fig 1-Fig 6 . Replace EFI main relay if defective.

Fig 1: Testing Circuit Opening Relay Or EFI Main Relay (Camry CNG & Gasoline Models, & Camry Solara)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Testing Circuit Opening Relay Or EFI Main Relay (Celica, Corolla & ECHO)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Testing Circuit Opening Relay Or EFI Main Relay (RAV4)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Testing Circuit Opening Relay (Tacoma)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 5: Testing EFI Main Relay (Tacoma)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 6: Testing Circuit Opening Relay & EFI Main Relay (4Runner)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002