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Home >> Pontiac >> 2001 >> Aztek Base, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics >> Inspection/Maintenance Procedures >> Inspection/Maintenance Air System Set Procedure >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform I/M system check. See INSPECTION/MAINTENANCE SYSTEM CHECK . After performing I/M system check, go to next step.
  2. Ensure vehicle is within the conditions for running this test. See ENABLE CRITERIA . Turn off all accessories (e.g., A/C, blower fan, etc.). Start and allow engine to idle for 2 minutes. In order for Active Test to run, vehicle must operate in the following conditions:
    • Accelerate at part throttle to 45 MPH and maintain speed for 3 minutes or until I/M system status indicator updates to YES.
    • Using scan tool, monitor I/M SYSTEM STATUS. If CATALYST SYSTEM STATUS is YES, go to step  5. If CATALYST SYSTEM STATUS is not YES, go to next step.
  3. Using scan tool, observe DTC information. If scan tool indicates any failed DTCs, diagnose affected DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If scan tool does not indicate any failed DTCs, go to next step.
  4. Using scan tool, observe the Not Ran Since Code Cleared display. Determine which of DTCs required for a YES status has not run. Enter DTC number in Specific DTC menu of scan tool. Operate vehicle within conditions for running the DTC. See ENABLE CRITERIA . Repeat procedure until scan tool indicates that diagnostic test has run. Repeat for any additional required DTCs that have not run. Using scan tool, observe I/M system status display. If AIR system status updates to YES, go to next step. If AIR system status does not update to yes, see DIAGNOSTIC AIDS .
  5. Using scan tool, check for DTCs. If scan tool indicates any DTCs are set, diagnose affected DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are displayed, system is okay.
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