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Home >> Eagle >> 1995 >> Vision ESi >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 3.3L >> Test NS-5A >> Inspecting Fuel Pump
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Inspecting Fuel Pump

NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.3L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-1  .
  1. Using scan tool, stop actuation test. Actuate Auto Shutdown (ASD) relay. Touch fuel pump relay. If fuel pump relay does not pulsate when actuated, go to TEST NS-5B  . If fuel pump relay pulsates when actuated, go to next step.
  2. Turn ignition off. Disconnect fuel pump relay. Using scan tool in voltmeter mode, check voltage on fuel pump relay connector terminal "B" (Red wire). If voltage is less than 10 volts, repair open Red wire. If voltage is more than 10 volts, go to next step.
  3. Reconnect fuel pump relay. Disconnect fuel pump connector. Ensure fuel pump connector has clean and tight connections. Turn ignition on. Go to next step.
  4. Using scan tool, actuate fuel system. Using scan tool in voltmeter mode, check voltage on fuel pump relay connector terminal No. 1 (Dark Green/Black wire). If voltage is less than 10 volts, go to step 6). If voltage is more than 10 volts, go to next step.
  5. Stop actuation test. Using scan tool in ohmmeter mode, check resistance of fuel pump connector terminal No. 5 (Black wire). If resistance is more than 5 ohms, repair open Black wire. If resistance is less than 5 ohms, replace fuel pump.
  6. If voltage is less than 10 volts in step 4), turn ignition off. Disconnect fuel pump relay. Connect a jumper wire between fuel pump relay connector terminal "D" (Dark Green/Black wire) and chassis ground. Go to next step.
  7. Using scan tool in ohmmeter mode, check resistance of fuel pump connector terminal No. 1 (Dark Green/Black wire). If resistance is less than 5 ohms, replace fuel pump relay. If resistance is more than 5 ohms, repair open Dark Green/Black wire.
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