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Home >> Oldsmobile >> 2000 >> Intrigue GL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0449: EVAP Vent Solenoid 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 on, with engine off. Using scan tool, command solenoid on and off. If solenoid turns on and off as commanded, go to next step. If solenoid does not turn on or off when commanded, go to step  5.
  3. Turn ignition off. Disconnect PCM harness connector. Turn ignition on. Using DVOM in 10-amp scale, check current from solenoid control circuit in PCM harness connector to ground for 2 minutes. If current draw is less than 0.1-0.75 amp, see DIAGNOSTIC AIDS . If current draw is not less than 0.1-0.75 amp, go to next step.
  4. Turn ignition off. Disconnect solenoid connector. Using DVOM, check resistance from solenoid control circuit in PCM harness connector and ground. If resistance is not infinite, go to step  11. If resistance is infinite, go to step  9.
  5. Turn ignition off. Disconnect solenoid connector. Connect test light between solenoid harness connectors. Turn ignition on. Using scan tool, command solenoid on and off. If test light turns on and off with each command, go to step  8. If test light does not turn on and off with each command, go to next step.
  6. Connect test light to ground and probe ignition feed circuit in solenoid harness connector. If test light illuminates, go to next step. If test light does not illuminate, go to step  10.
  7. Turn ignition off. Reconnect solenoid harness connector. Disconnect PCM harness connector. Turn ignition on. Connect a fused jumper wire between ground and PCM harness connector, solenoid control circuit. If solenoid operates, go to step  12. If solenoid does not operate when energized, go to step  9.
  8. Check connections at solenoid. Repair as necessary. After repairs, go to step  14. If connections are okay, go to step  11.
  9. Repair solenoid control circuit. After repairs, go to step  14.
  10. Repair ignition feed circuit to solenoid. After repairs, go to step  14.
  11. Replace solenoid. After replacing solenoid, go to step  14.
  12. Check for poor connections/terminals at PCM harness connector. Repair as necessary. After repairs, go to step  14. If connections are okay, go to next step.
  13. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
  14. Using scan tool, select DTC, CLEAR INFO function. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter 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.
  15. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test.
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