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Home >> Nissan-Datsun >> 1997 >> Sentra Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests 1.6 >> Fuel System >> Fuel Pump System Test
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Fuel Pump System Test

  1. Turn ignition on. With fingers, pinch fuel feed hose at fuel filter. Fuel pressure pulsation should be felt for 5 seconds after ignition is turned on. If pulsation is not felt, go to next step. If pulsation is felt, system is functioning properly.
  2. Turn ignition off. Disconnect fuel pump relay. Fuel pump relay is located in relay box (behind instrument panel with 2.0L engine). Turn ignition on. Measure voltage between ground and fuel pump relay harness connector terminals No. 1 (Black/Blue wire) and No. 3 (Black/White wire). Battery voltage should be present. If battery voltage is present, go to next step. If battery voltage is not present, check 15-amp fuse in main fuse box. Check harness continuity between fuse and fuel pump relay. Repair or replace as necessary.
  3. Check fuel pump relay. See RELAYS  under RELAYS & SOLENOIDS. If relay is okay, check fuel pump. See FUEL PUMP. If fuel pump relay and fuel pump are okay, disconnect and inspect harness and connectors for pushed-out, bent, damaged or corroded terminals. Repair harness or connectors as necessary.
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