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Home >> Lexus >> 1992 >> SC 300 Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Relays >> EFI Main Relay
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EFI Main Relay

  1. EFI main relay is located in engine compartment. Using an ohmmeter, check for continuity between relay terminals No. 1 and 3. Ensure continuity is not present between terminals No. 2 and 4. If continuity is not as specified, replace relay.
  2. Apply battery voltage between relay terminals No. 1 and 3. Using an ohmmeter, check for continuity between terminals No. 2 and 4. If continuity is not present, replace relay.
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