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Home >> Chevrolet >> 2001 >> Tracker 2D Utility, 4WD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics >> Inspection/Maintenance Procedures >> Inspection/Maintenance Heated Oxygen Sensor/Oxygen Sensor (Ho2S/O2S) System Set Procedure >> 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. CAUTION: Road test 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.
  2. In order for this test to run, operate vehicle in the following conditions:
    • Accelerate vehicle to 50-60 MPH and cruise for 3-5 minutes after engine reaches operating temperature or when I/M System Status updates to YES.

    Using scan tool, review I/M System Status display. If display updates to YES, go to step  5 . If display does not update to 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. NOTE: Refer to INSPECTION/MAINTENANCE COMPLETE SYSTEM SET PROCEDURE  to determine which DTCs are required to run in order to complete this test.
  4. Using scan tool, observe the NOT RAN SINCE CODE CLEARED display. Determine which of the DTCs required for a YES status has not run. Operate vehicle within Conditions For Running DTC. Monitor status of DTCs that are necessary to complete the test in the NOT RAN SINCE CODE CLEARED display of scan tool. Repeat procedure until scan tool indicates the diagnostic test has run. Repeat this step for any additional required DTCs that have not run. Using scan tool, observe I/M System Status display. If HO2S/O2S System Status updates to YES, go to next step. If status does not update to YES, see DIAGNOSTIC AIDS  .
  5. Using scan tool, observe the emission related DTC portion of the I/M System Status display. If scan tool indicates any emission related DTCs are set, diagnose affected DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  . If scan tool does not indicate any emission related DTCs are set, system is okay.
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