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Home >> Pontiac >> 2001 >> Aztek Base, AWD >> 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 powertrain diagnostic system check. See POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing diagnostic system check, go to next step.
  2. Turn ignition on, with engine off. Using scan tool, command fuel pump on and off. If fuel pump relay turns on and off with each command, go to next step. If fuel pump relay does not turn on and off with each command, go to step  4.
  3. Observe FREEZE FRAME/FAILURE RECORDS data for this DTC. Turn ignition off for 30 seconds. Operate vehicle within the conditions for running this DTC or as close to FREEZE FRAME/FAILURE RECORDS data observed. See CODE ENABLE CRITERIA . If DTC fails this ignition, go to next step. If DTC does not fail this ignition, problem is intermittent.
  4. Turn ignition off. Remove fuel pump relay. Fuel pump relay is located in underhood fuse/relay block. Turn ignition on, with engine off. Using a test light connected to ground, probe fuel pump relay control circuit (Dark Green/White wire) at underhood fuse/relay block. See WIRING DIAGRAMS article. Using scan tool, command fuel pump 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, go to step  6.
  5. Connect test light between fuel relay control circuit (Dark Green/White wire) and fuel pump relay ground circuit (Black/White wire) at underhood fuse relay block. Using scan tool, command fuel pump on and off. If test light turns on and off with each command, go to step  9. If test light does not turn on and off with each command, go to step  11.
  6. If test light remains illuminated with each command, go to step  8. If test light does not remain illuminated with each command, go to next step.
  7. Turn ignition off. Check fuel pump relay control circuit (Dark Green/White wire) for short to ground or open circuit. Repair as necessary. After repairs, go to step  14. If circuit is okay, go to step  10.
  8. Turn ignition off. Check fuel pump relay control circuit (Dark Green/White wire) for short to voltage. Repair as necessary. After repairs, go to step  14. If circuit is okay, go to step  10.
  9. Turn ignition off. Check for poor connections at fuel pump relay. Repair as necessary. After repairs, go to step  14. If connections are okay, go to step  12.
  10. Turn ignition off. Check for poor connections at PCM harness connectors. Repair as necessary. After repairs, go to step  14. If connections are okay, go to step  13.
  11. Turn ignition off. Repair fuel pump relay ground circuit. After repairs, go to step  14.
  12. Replace fuel pump relay. After replacing relay, go to step  14.
  13. Replace PCM. Perform PCM relearn procedure. See POWERTRAIN CONTROL MODULE  under PROGRAMMING. After replacing PCM, go to next step.
  14. Turn ignition on, with engine off. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Operate vehicle within the conditions for running this DTC. See CODE ENABLE CRITERIA . If DTC runs and passes, go to next step. If DTC resets, go to step  2.
  15. Using scan tool, observe the stored information and CAPTURE INFO. If scan tool displays any undiagnosed DTCs, diagnose affected DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are displayed, system is okay.
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