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Home >> Oldsmobile >> 2001 >> Intrigue GLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Inspection/Maintenance Procedures >> Inspection/Maintenance Complete System Set Procedure >> Diagnostic Procedures
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Diagnostic Procedures

NOTE: Before performing this procedure, read diagnostic aid information. See DIAGNOSTIC AIDS .
  1. If I/M system check has been performed, go to next step. If I/M system check has not been performed, go to INSPECTION/MAINTENANCE SYSTEM CHECK .
    NOTE: Whenever ignition is on, ignition voltage is supplied to Heated Oxygen Sensor (HO2S) heaters. After verifying enable criteria, turn ignition off for approximately 5 minutes to allow sensors to cool before continuing test. Once engine is started, DO NOT turn engine off for remaining portion of procedure.
  2. Program scan tool with vehicle information before ignition is turned on. Turn off all accessories, including A/C and blower fan. Set vehicle parking brake. Ensure transmission is in Park. Ensure vehicle meets conditions for running this procedure. See ENABLE CRITERIA . Start engine. Allow engine to idle. Allow engine to idle for 2 minutes. Go to next step.
  3. Test drive vehicle. Ensure vehicle is accelerated at part throttle to 55 MPH. Drive vehicle at 55 MPH until engine reaches normal operating temperature. This may take 8-10 minutes depending on start-up coolant temperature. Continue test driving vehicle under these conditions for 6 minutes. Go to next step.
  4. Reduce vehicle speed to 45 MPH, maintain this speed for one additional minute. Perform 4 decelerations of 25 seconds each from 45 MPH while maintaining the following criteria:
    • Throttle is closed.
    • No brake application.
    • No clutch actuation (M/T).
    • No manual downshift.
    • Vehicle speed remains greater than 25 MPH.

    After each deceleration period, vehicle speed is returned to 45 MPH under part throttle acceleration and speed is maintained for 15 seconds. Go to next step.

  5. Accelerate vehicle at part throttle to 45-55 MPH. Maintain this speed for 2 minutes. Decelerate vehicle to zero MPH. Idle engine for 2 minutes while service brake is depressed and transmission is in Drive. Go to next step.
  6. Using scan tool, observe I/M system status display. If all I/M system status indicators updated to YES, go to next step. If any I/M system status indicator did not update to YES, repeat procedure.
  7. Using scan tool, observe emission related DTC portion of I/M system status display. If scan tool indicates any emission related DTCs, perform appropriate diagnostic test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If scan tool does not indicate emission related DTCs, system is okay.
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