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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 247 (Engine Controls Self-Diagnostics - 3.4L) >> Diagnostic Tests >> DTC P0230: Fuel Pump Primary Circuit >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, 2003 Chevrolet Monte Carlo, and 2003 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform diagnostic system check - engine controls. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM. After performing diagnostic system check - engine controls, go to next step.
  2. Turn ignition switch to RUN position, engine OFF. Using a scan tool, command the fuel pump ON and OFF. Does the fuel pump relay turn ON and OFF with each command? If yes, go to next step. If no, go to step  4.
  3. Observe the Freeze Frame/Failure Records data for this DTC. Turn ignition switch to OFF position for 30 seconds. Start the engine. Operate the vehicle within the Conditions For Running as specified in the supporting text or as close to the Freeze Frame/Failure Records data that you observed. See CONDITIONS FOR RUNNING . Does the DTC fail this ignition? If yes, go to next step. If no, see INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 3.4L ALERO, GRAND AM, IMPALA & MONTE CARLO article.
  4. Turn ignition switch to OFF position. Disconnect the fuel pump relay. Turn ignition switch to RUN position, engine OFF. Probe the fuel pump relay control circuit using a test light connected to a good ground. Using a scan tool, command the fuel pump ON and OFF. Does the test light turn ON and OFF with each command? If yes, go to next step. If no, go to step  6.
  5. Connect a test light between the fuel pump relay control circuit and the fuel pump relay ground circuit. Using a scan tool, command the fuel pump ON and OFF. Does the test light turn ON and OFF with each command? If yes, go to step  9. If no, go to step  11.
  6. Does the test light remain illuminated with each command? If yes, go to step  8. If no, go to next step.
  7. Check the control circuit of the fuel pump relay for a short to ground or an open. Did you find and correct the condition? If yes, go to step  14. If no, go to step  10.
  8. Check the fuel pump relay control circuit for a short to voltage. Did you find and correct the condition? If yes, go to step  14. If no, go to step  10.
  9. Inspect for poor connections at the fuel pump relay. Did you find and correct the condition? If yes, go to step  14. If no, go to step  12.
  10. Inspect for poor connections at the harness connectors of the PCM. Did you find and correct the condition? If yes, go to step  14. If no, go to step  13.
  11. Repair the fuel pump relay ground circuit. After repair, go to step  14.
  12. Replace the fuel pump relay. After repair, go to step  14.
  13. Replace PCM. See POWERTRAIN CONTROL MODULE in appropriate REMOVAL & INSTALLATION article. Perform PCM relearn procedure. See POWERTRAIN CONTROL MODULE  under PROGRAMMING. After replacing PCM, go to next step.
  14. Using a scan tool, clear the DTCs. Turn ignition switch to OFF position for 30 seconds. Start the engine. Operate the vehicle within the Conditions For Running. See CONDITIONS FOR RUNNING . You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition? If yes, go to step  2. If no, go to next step.
  15. Using the scan tool, observe the stored information in CAPTURE INFO. Does the scan tool display any DTCs that you have not diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay at this time.
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