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Home >> Chevrolet >> 2003 >> Tracker 2D Utility, 4WD, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Control System Self-Diagnostics - 2.5L) >> Drive Cycles >> Inspection/Maintenance Heated Oxygen Sensor/Oxygen Sensor (Ho2S/O2S) System Set Procedure >> Diagnostic Procedures
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Diagnostic Procedures

WARNING: This page is about a different variant/trim than selected.
  1. Did you perform the Inspection/Maintenance (I/M) System Check? If yes, go to next step. If no, go to INSPECTION/MAINTENANCE SYSTEM CHECK  .
    2. WARNING: Road test a vehicle under safe conditions and while obeying all traffic laws. DO NOT attempt any maneuvers that could jeopardize vehicle control and could result in serious personal injury and vehicle damage.
  2. Ensure vehicle is within the Conditions for Running. See CONDITIONS FOR RUNNING  . Turn off all accessories, e.g., A/C, blower fan, etc. Start and idle engine. Important: In order for this test to run, the vehicle must operate in the following conditions: Accelerate vehicle to 50-60 MPH (80-100 km/h) and operate vehicle within the specified speed for 3-5 minutes or until the I/M System Status updates to YES. With a scan tool, review the I/M System Status display. Did the HO2S/O2S System Status update to YES? If yes, go to step  5 . If no, 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. CONDITIONS FOR RUNNING  . Monitor status of DTCs that are necessary to complete the test in the NOT RAN SINCE CODE CLEARED display of scan tool. Repeat this 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. Did the HO2S/O2S System Status update to YES? If yes, go to next step. If no, see DIAGNOSTIC AIDS  .
  5. Using 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, diagnose affected DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  . If no, system is okay.
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