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Home >> Nissan-Datsun >> 1994 >> Pathfinder LE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Idle Control System >> 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 under FUEL DELIVERY SYSTEM. If fuel pump operates, go to next step.
  2. Turn ignition off. Disconnect air regulator harness connector. Measure voltage between ground and air regulator harness connector White/Blue wire.
  3. Turn ignition on. 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 White/Blue 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 TEST. If continuity does not exist, repair open in Black wire.
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