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Home >> Pontiac >> 2003 >> Aztek AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics >> Drive Cycles >> Inspection/Maintenance Complete System Set Procedure >> Diagnostic Procedures
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Diagnostic Procedures

  1. Did you perform the Inspection/Maintenance (I/M) System Check? If yes, go to next step. If no, see INSPECTION/MAINTENANCE SYSTEM CHECK .
    2. NOTE: Whenever the ignition is turned ON, ignition positive voltage is supplied to the HO2S heaters. After verifying the enable criteria, Turn ignition off for about 5 minutes to allow the sensors to cool before continuing with the test. Once engine is started, DO NOT turn engine OFF for the remaining portion of the set procedure.
  2. Preprogram the scan tool with the vehicle information before the ignition is turned ON. Ensure that the vehicle is within the Conditions for Running. See CONDITIONS FOR RUNNING . Turn OFF all of the accessories (e.g., A/C, blower fan, etc.). Set the vehicle parking brake. Verify that the transmission is in Park (A/T) or Neutral (M/T). Start engine and allow engine to idle for 2 minutes. When complete, go to next step.
    3. WARNING: Road test a vehicle under safe conditions and while obeying all traffic laws. Do not attempt any maneuvers that could jeopardize vehicle control. Failure to adhere to these precautions could lead to serious personal injury and vehicle damage.
  3. In order for the next group of tests to run, the vehicle must operate in the following conditions:
    • Accelerate at part throttle to 55 MPH with this speed maintained until engine reaches operating temperature. This may be up to 8-10 minutes depending on the start-up coolant temperature.
    • Continued operation under these conditions for an additional 6 minutes.

    After procedure, go to next step.

  4. In order for the next group of tests to run, the vehicle must operate in the following conditions:
    • Vehicle speed reduced to 45 MPH with this speed maintained for one additional minute.
    • Four decelerations of 25 seconds each from 45 MPH while the following criteria is maintained:
      1. The throttle is closed.
      2. NO brake application on either manual or automatic transmission.
      3. NO clutch actuation on a manual transmission.
      4. NO manual downshift.
      5. Vehicle speed remains more than 25 MPH.
      6. After each deceleration period, the vehicle is returned to 45 MPH under part throttle acceleration and the speed is maintained for 15 seconds.
    When complete, go to next step.
  5. In order for the next group of tests to run, the vehicle must operate in the following conditions:
    • Accelerate at part throttle to 45-55 MPH with this speed maintained for 2 minutes.
    • Decelerate to zero MPH.
    • Engine idling for 2 minutes while the following criteria is maintained:
      1. Service brake depressed.
      2. Automatic transmission in Drive.
      3. Manual transmission in Neutral with the clutch pedal depressed.
    When complete, go to next step.
  6. With a scan tool, observe the I/M System Status display. Did all of the I/M System Status indicators update to YES? If yes, go to next step. If no, go to the I/M System Set Procedure for the indicated systems.
  7. With a scan tool, observe the Emission Related DTC portion of the I/M System Status display. Does the scan tool indicate any Emission Related DTCs set? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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