EFI Main Relay

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

NOTE: The EFI main relay may also be identified using appropriate illustration in THEORY/OPERATION - 1.6L article or wire color. See wiring diagram in the WIRING DIAGRAMS article.

EFI MAIN RELAY LOCATION

Application	Location
Corolla	Fuse/Relay Box Near Driver's Side Front Corner Of Engine Compartment

Using ohmmeter, check continuity between specified terminals. See Fig 1 or Fig 2 .
Check EFI main relay operation by applying battery voltage and ground and checking continuity between specified terminals. See Fig 3 or Fig 4 . Replace EFI main relay if defective.

Fig 1: Testing EFI Main Relay (Checking Continuity - Bosch)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Testing EFI Main Relay (Checking Continuity - Nippondenso)

Fig 3: Testing EFI Main Relay (Checking Operation - Bosch)

Fig 4: Testing EFI Main Relay (Checking Operation - Nippondenso)