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Home >> Oldsmobile >> 2000 >> Intrigue GL >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0230: Fuel Pump Relay Control Circuit >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
  2. Turn ignition off. Wait 15 seconds, then turn ignition on, with engine off. Listen for fuel pump operation. Fuel pump should operate for 2 seconds. Fuel pump can also be commanded on using scan tool. If fuel pump turns on and off, problem is intermittent. See DIAGNOSTIC AIDS . If fuel pump does not turn on and off, go to next step.
  3. If fuel pump stays on all the time, go to step  9. If fuel pump does not stay on all the time, go to next step.
  4. Using a test light, connect test light between fuel pump relay connector cavities for the control and ground circuit. Using scan tool, select fuel pump output control function and command fuel pump on. Observe test light. If test light illuminates when fuel pump is commanded on, go to step  10. If test light does not illuminate when fuel pump is commanded on, go to next step.
  5. Connect test light between battery voltage and fuel pump relay ground circuit. If test light illuminates, go to next step. If test light does not illuminate, go to step  12.
  6. Turn ignition off. Disconnect PCM harness connector. Using test light connected to battery voltage, probe test light to fuel pump relay control circuit at PCM harness connector side. If test light illuminates, go to step  11. If test light does not illuminate, go to next step.
  7. Check for open in fuel pump relay control circuit between PCM and fuel pump relay. Repair as necessary. After repairs, go to step  16. If circuit is okay, go to next step.
  8. Check fuel pump relay control circuit for poor terminal connection at PCM. Repair as necessary. After repairs, go to step  16. If connections are okay, go to step  15.
  9. Turn ignition off. Disconnect PCM harness connector. Turn ignition on. Observe fuel pump. If fuel pump is running, go to step  13. If fuel pump is not running, go to step  15.
  10. Check for poor terminal connection at fuel pump relay. Repair as necessary. After repairs, go to step  16. If terminal connection is okay, go to step  14.
  11. Locate and repair short to ground in fuel pump relay control circuit. After repairs, go to step  16.
  12. Locate and repair open in fuel pump relay ground circuit. After repairs, go to step  16.
  13. Locate and repair short to voltage in fuel pump relay control circuit. After repairs, go to next step  16.
  14. Replace fuel pump relay. After replacing relay, go to step  16.
  15. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
  16. Using scan tool, clear DTCs. Turn ignition off for 15 seconds. Start engine and 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, go to step  2.
  17. Using scan tool, select CAPTURE INFO. If any undiagnosed DTCs are displayed, go to applicable DTC test.
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