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Diagnostic Procedures

  1. Perform Inspection/Maintenance (I/M) system check. See INSPECTION/MAINTENANCE SYSTEM CHECK . After performing Inspection/Maintenance (I/M) system check, go to next step.
  2. Ensure vehicle meets requirements listed in CONDITIONS FOR RUNNING . Turn all accessories off. Start engine and allow to idle for 2 minutes. Road test vehicle. Accelerate at part throttle to 45 MPH. Maintain this speed for 3 minutes or until I/M system status indicator updates to YES. Using scan tool, monitor I/M system status display. If I/M system status display updates to YES, go to step  5. If I/M system status display does not update to YES, go to next step.
  3. Using scan tool, monitor DTCs. If any DTCs are set, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are set, go to next step.
  4. Using scan tool, monitor NOT RAN SINCE CODE CLEARED display. Determine which DTCs required for YES status have not run. See INSPECTION/MAINTENANCE SYSTEM DIAGNOSTIC TROUBLE CODES  table under INSPECTION/MAINTENANCE (I/M) SYSTEM CHECK. Enter DTC number in SPECIFIC DTC menu of scan tool. Operate vehicle within conditions for running DTC located in FREEZE FRAME and/or FAILURE RECORDS for DTC. Repeat procedure until scan tool indicates diagnostic test has run. Repeat step for any additional required DTCs that have not run. Using scan tool, observe I/M system status display. If I/M system status display updates to YES, go to next step. If I/M system status display does not update to YES, go to DIAGNOSTIC AIDS .
  5. Using scan tool, observe emission related DTC portion of I/M system status display. If scan tool indicates any emission related DTCs are set, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS . If scan tool does not indicate any emission related DTCs are set, system is okay at this time.
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