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Home >> Chevrolet >> 2000 >> Venture Plus >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics >> Diagnostic Tests >> DTC P0230: Fuel Pump Control Circuit >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
  2. Turn ignition on, with engine off. Using a scan tool, command fuel pump relay on and off. If relay turns on and off with each command, see DIAGNOSTIC AIDS . If relay does not turn on and off with each command, go to next step.
  3. Turn ignition off. Disconnect fuel pump relay. Turn ignition on, with engine off. Using a test light connected to ground, probe relay control circuit. Using scan tool, command relay on and off. If test light turns on and off with each command, go to next step. If test light does not turn on and off with each command, go to step  5.
  4. Connect test light between relay control and ground circuits. Using scan tool, command relay on and off. If test light turn on and off with each command, go to step  8. If test light does not turn on and off with each command, go to step  10.
  5. If test light remains illuminated with each command, go to step  7. If test light does not remain illuminated with each command, go to next step.
  6. Check relay control circuit for short to ground or an open circuit. Repair as necessary. After repairs, go to step  13. If circuit is okay, go to step  9.
  7. Check relay control circuit for short to voltage. Repair as necessary. After repairs, go to step  13. If circuit is okay, go to step  9.
  8. Check for poor connections at relay. Repair as necessary. After repairs, go to step  13. If connections are okay, go to step  11.
  9. Check for poor connections at PCM. Repair as necessary. After repairs, go to step  13. If connections are okay, go to step  12.
  10. Repair relay ground circuit. After repairs, go to step  13.
  11. Replace relay. After replacing relay, go to step  13.
  12. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
  13. Using scan tool, select DTC, CLEAR INFO function. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter this DTC. Operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, repeat step  2.
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