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EFI Main Relay: Inspection

  1. REMOVE RELAY BOX COVER 
  2. REMOVE EFI MAIN RELAY 
    Fig 1: Removing Relay Box Cover & EFI Main Relay
    G02639454Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT EFI MAIN RELAY 
    1. Inspect the relay continuity.
      1. Using an ohmmeter, check that there is continuity between terminals 1 and 2.

        If there is no continuity, replace the relay.

      2. Check that there is no continuity between terminals 3 and 5.
        3. Fig 2: Inspecting EFI Main Relay Continuity
        G02639455Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If there is continuity, replace the relay.

    2. Inspect the relay operation.
      1. Apply battery positive voltage to terminals 1 and 2.
      2. Using an ohmmeter, check that there is continuity between terminals 3 and 5.
        3. Fig 3: Inspecting EFI Main Relay Operation
        G02639456Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If there is no continuity, replace the relay.

  4. REINSTALL EFI MAIN RELAY 
  5. REINSTALL RELAY BOX COVER 
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