EFI Main Relay: Inspection

WARNING: This page is about a different car, the 2004 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

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

Fig 1: Identifying EFI Main Relay

INSPECT EFI MAIN RELAY
1. Inspect the relay continuity.
  1. Using an ohmmeter, check that there is a continuity between terminals 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.
2. Inspect the relay operation.
  1. Apply battery positive voltage across terminal 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.
Fig 3: Inspecting Relay Operation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REINSTALL EFI MAIN RELAY
REINSTALL RELAY BOX COVER