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Home >> Toyota >> 2001 >> 4Runner Base >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Engine Immobilizer Systems >> Component Tests >> EFI Relay

EFI Relay

NOTE: EFI relay may also be referred to as EFI main relay.
  1. Ensure ignition is off. Remove EFI relay from fuse/relay box at driver's side front corner of engine compartment.
  2. To test EFI relay continuity, using ohmmeter, check for continuity and no continuity between specified terminals on EFI relay. See Fig 1.
  3. To test EFI relay operation, apply battery voltage and ground to EFI relay and use ohmmeter to check continuity between specified terminals on EFI relay. See Fig 1. Replace EFI relay if defective.
    Fig 1: Testing EFI Relay
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