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Diagnostic Procedures

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Did you perform the Diagnostic System Check - Engine Controls? If yes, go to next step. If no, go to DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM.
  2. Turn ignition on, with engine off. With scan tool, command 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. Using scan tool, observe and record FREEZE FRAME/FAILURE RECORDS data for this DTC. Turn ignition off for 30 seconds. Start engine. Operate vehicle within conditions for running the DTC or as close to recorded FREEZE FRAME/FAILURE RECORDS data as possible. See CONDITIONS FOR RUNNING DTC . If DTC resets, go to next step. If DTC does not reset, fault may be intermittent. See INTERMITTENT CONDITIONS  under SELF-DIAGNOSTIC SYSTEM.
  4. Turn ignition off. Disconnect fuel pump relay. Turn ignition on, with engine off. Probe the control circuit of the fuel pump relay with a test light connected to a good ground. Using scan tool, command fuel pump ON and OFF. Does 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 control circuit of the fuel pump relay and ground circuit of relay. Using scan tool, command 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. If test light is always on, go to step  8. If test light is always off, go to next step.
  7. Test 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. Test the control circuit of the fuel pump relay 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. Check fuel pump relay connector for poor connections. Repair connector as necessary. After repairs, go to step  14. If connector is okay, go to step  12.
  10. Check PCM connectors for poor connections. Repair connectors as necessary. After repairs, go to step  14. If connectors are okay, go to step  13.
  11. Repair open in fuel pump relay ground circuit. After repairs, go to step  14.
  12. Replace fuel pump relay. After repairs, go to step  14.
  13. Replace PCM. Program replacement PCM. See PROGRAMMING . After repairs, go to next step.
  14. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Start engine. Operate vehicle within conditions for running the DTC. See CONDITIONS FOR RUNNING DTC . If DTC runs and passes, go to next step. If DTC resets, go to step  2.
  15. Using scan tool, check for any other DTCs that are set. If no other DTCs are set, system is okay. If any other DTCs are set, repair DTCs as necessary. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
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