Diagnostic Procedures
- Did you perform the Inspection/Maintenance (I/M) system check? If yes, go to next step. If no, go to INSPECTION/MAINTENANCE SYSTEM CHECK .
- Ensure vehicle is within conditions for running. See CONDITIONS FOR RUNNING . Turn OFF all accessories, e.g., A/C, blower fan, etc. Start and idle the engine. Important: For this test to run, vehicle must operate in the following conditions:
- Idle engine for one minute after reaching operating temperature of 158°F (70°C).
- Acceleration at part throttle to 35-55 MPH (56-90 km/h) with this speed maintained for 2-3 minutes or until I/M system status updates to YES.
- Using scan tool, observe I/M system status display.
- Using scan tool, observe DTC information. Does scan tool indicate any failed DTCs? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, go to next step.
- Operate vehicle within Conditions for Running the DTC. See CONDITIONS FOR RUNNING . Repeat procedure until scan tool indicates the diagnostic test has run. Using scan tool, observe I/M System Status display. Did the Catalyst System Status update to YES? If yes, go next step. If no, see DIAGNOSTIC AIDS .
- Using scan tool, observe emission related DTC portion of I/M system status display. Does scan tool indicate any emission related DTCs? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay at this time.
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:
Refer to INSPECTION/MAINTENANCE SYSTEM DTCS to determine which DTCs are required to run to complete this test.