Testing EFI Main, Starter & Circuit Opening Relays

For relay terminal identification, see Fig 1 or Fig 2 . If relay continuity is not as specified, replace relay and retest system.

• Continuity should exist between terminals No. 1 and 2.
• Continuity should not exist between terminals No. 3 and 5.
• Apply battery voltage across terminals No. 1 and 2. Continuity should exist between terminals No. 3 and 5.

Fig 1: Identifying EFI Main (All Models) & Circuit Opening (IS300, LS430 & SC430) Relay Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Identifying Starter Relay Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002