EFI Main Relay: Inspection

REMOVE RELAY BOX COVER
REMOVE EFI MAIN RELAY (Marking: EFI)

Fig 1: Removing EFI Main Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT EFI MAIN RELAY
1. Inspect the relay continuity.
  1. Using an ohmmeter, check that there is a continuity between terminal 1 and 3.
    If there is no continuity, replace the relay.
  2. Check that there is no continuity between terminals 2 and 4.
    If there is a continuity, replace the relay.
    
    Fig 2: Inspecting Relay Continuity
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the relay operation.
  1. Apply battery positive voltage across terminals 1 and 3.
  2. Using an ohmmeter, check that there is a continuity between terminal 2 and 4.
    If there is no continuity, replace the relay.
REINSTALL EFI MAIN RELAY
REINSTALL RELAY BOX COVER

Fig 3: Inspecting Relay Operation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002