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Home >> Chevrolet >> 2002 >> Tracker 2D Utility, 4WD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 2.0L >> Inspection/Maintenance Procedures >> Inspection/Maintenance EGR 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, 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 the vehicle is within the Conditions for Running. Turn OFF all of the accessories, e.g., A/C, blower fan, etc. Start engine and warm to operating temperature of at least 158°F (70°C). This may be up to 8-10 minutes depending on the start up coolant temperature. Important: In order for this test to run, the vehicle must operate in the following conditions: Accelerate at part throttle to 55 MPH (88 km/h) with speed maintained for 2 minutes. Decelerate for 10 seconds from 55 MPH (88 km/h) while the following criteria is maintained: Throttle is closed, NO brake application during deceleration, NO clutch actuation during deceleration, NO manual downshift, and vehicle speed remains above 25 MPH (40 km/h). With a scan tool, observe the I/M System Status display. Did the EGR System Status update to YES? If yes, go to step  5 . If no, go to next step.
  3. Using scan tool, observe DTC Information. Does the scan tool indicate any failed DTCs? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS  . If no, go to next step.
    NOTE: Refer to INSPECTION/MAINTENANCE SYSTEM DTC TABLE  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 the Conditions for Running the DTC. Repeat the procedure until the scan tool indicates the diagnostic test has run or for any additional required DTCs that have not run. Using scan tool, observe the I/M System Status display. Did the EGR System Status update to YES? If yes, go to next step. If no, go to DIAGNOSTIC AIDS  .
  5. Using scan tool, observe the emission related DTC portion of 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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