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Starter Relay

  1. Remove starter relay from junction block No. 2. Junction block No. 2 is located in left side engine compartment. Using a DVOM, check for continuity between relay terminals No. 1 and 3. See Fig 1. Ensure continuity is not present between terminals No. 2 and 4.
    Fig 1: Identifying LS400 Starter Relay Terminals
    G90E18857Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. If continuity is not as specified, replace relay. Apply battery voltage between terminals No. 1 and 3. Check for continuity between terminals No. 2 and 4. If continuity is not as specified, replace relay.