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Home >> Nissan-Datsun >> 1980 >> 280ZX Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Mixture Ratio Feedback System >> Testing & Diagnosis >> EFI Control Unit

EFI Control Unit

  1. Remove jumper wire from exhaust gas sensor terminal and leave connector at sensor disconnected. Start engine and operate at 2000 RPM under no-load condition.
  2. With exhaust gas sensor harness disconnected, monitor lamp on control unit should not glow. With harness connector terminal grounded, monitor lamp should glow.
  3. If monitor lamp does not operate as described, replace control unit. If good, proceed to "EXHAUST GAS OXYGEN SENSOR ".
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