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Home >> Nissan-Datsun >> 1996 >> Quest XE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests 3.0L >> Idle Control Systems >> Air Regulator System Test
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Air Regulator System Test

  1. Turn ignition on. Pinch fuel feed hose with fingers to feel fuel pulsations or listen for fuel pump operating sound. Fuel pump should operate for 5 seconds after ignition is turned on. If fuel pump does not operate, see FUEL PUMP SYSTEM TEST  . If fuel pump operates, go to next step.
  2. Turn ignition off. Disconnect air regulator harness connector. Turn ignition on. Measure voltage between ground and air regulator harness connector Light Green/Red wire.
  3. Battery voltage should be present for 5 seconds after ignition is turned on. If voltage is as specified, go to next step. If voltage is not as specified, check continuity of Light Green/Red wire between air regulator harness connector and fuel pump relay. Repair or replace harness or connectors as necessary. If continuity is okay, check fuel pump relay. See RELAYS  under RELAYS & SOLENOIDS.
  4. Turn ignition off. Check continuity between ground and air regulator harness connector Black wire. Continuity should exist. If continuity exists, check air regulator. See AIR REGULATOR  . If continuity does not exist, repair open Black or Blue/White wire.
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