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Home >> Chevrolet >> 2002 >> Prizm Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 1.8L >> Inspection/Maintenance Procedures >> 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, go to INSPECTION/MAINTENANCE SYSTEM CHECK  .
  2. Ensure the vehicle is within the Conditions for Running. See CONDITIONS FOR RUNNING DTC  . Set vehicle parking brake. Verify the transmission is in Park (A/T) and Neutral (M/T). Turn OFF all of the accessories, e.g., A/C, blower fan, etc. Once engine is started, DO NOT turn OFF engine for the remainder of the procedure until the test is complete. Start and idle engine until engine reaches an operating temperature of at least 70°C (158°F). This may be up to 8-10 minutes depending on start-up coolant temperature. When complete, go to next step.
    3. WARNING: 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.
    NOTE: In order for the remaining portion of this test to run, vehicle must operate in the following conditions.
  3. Accelerate vehicle at part throttle to 45-55 MPH and maintain with this speed for 4 minutes or until the I/M System Status indicator updates to YES, then go to next step.
  4. Stop vehicle. Operate engine at idle for 2 minutes while maintaining the following criteria:
    • Service brakes depressed.
    • Transmission in Drive (A/T).
    • Transmission in Neutral with clutch depressed (M/T).

    After completing action, go to next step.

  5. Accelerate vehicle at part throttle to 45-55 MPH and maintain speed for 4 minutes or until I/M System Status indicator updates to YES, then go to next step.
  6. Using scan tool, observe I/M System Status display. If all I/M System Status indicators update to YES, go to next step. If not all I/M System Status indicators update to YES, repeat this procedure.
  7. Using scan tool, observe emission related DTC portion of I/M System Status display. If scan tool indicates any emission related DTCs, see DIAGNOSTIC TROUBLE CODE DEFINITIONS  . If scan tool does not indicate emission related DTCs, system is okay.
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