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Circuit Opening Relay

  1. Turn ignition off. Remove relay from vehicle. Using a DVOM, check for continuity between relay terminals STA and E1. See Fig 1. Check for continuity between terminals B and FC. Ensure there is no continuity between B and FP. If continuity is not as specified, replace relay.
    Fig 1: Identifying ES250 Circuit Opening Relay Terminals
    G90C18855Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Apply battery voltage between terminals STA and E1. Using a DVOM, ensure continuity is present between terminals B and FP. Apply battery voltage between terminals B and FC. Ensure continuity is present between terminals B and FP. If continuity is not as specified, replace relay.