Inspection/Maintenance Catalyst System Set Procedure: Procedure
- Perform INSPECTION/MAINTENANCE SYSTEM CHECK . After performing inspection/maintenance system check, go to next step.
- Ensure vehicle is operating within enable criteria. Turn all accessories off. Start engine and allow to idle. Operate vehicle in the following manor:
- Accelerate at part throttle to 55 MPH and maintain speed for 5 minutes.
- Decelerate to zero MPH and allow engine to idle for 2 minutes while service brake is depressed, A/T in Drive and M/T in neutral with clutch pedal depressed.
Using scan tool, monitor I/M SYSTEM STATUS. If CATALYST SYSTEM STATUS is YES, go to step 5. If CATALYST SYSTEM STATUS is not YES, go to next step.
- Using scan tool, observe DTC information. If scan tool indicates any failed DTCs, see DIAGNOSTIC TROUBLE CODE INDEX table under DIAGNOSTIC TROUBLE CODE DEFINITIONS. If scan tool does not indicate any failed DTCs, go to next step.
- Using scan tool, monitor DTC P0420. Operate vehicle within code enable criteria for DTC P0420. See DTC P0420: CATALYST SYSTEM LOW EFFICIENCY under DIAGNOSTIC TESTS. Operate vehicle within code enable criteria until scan tool indicates diagnostic test has run. Using scan tool, observe I/M SYSTEM STATUS. If catalyst system status is YES, go to next step. If catalyst system status is not YES, see DIAGNOSTIC AIDS .
- Using scan tool, check for DTCs. If scan tool indicates any DTCs are set, see DIAGNOSTIC TROUBLE CODE DEFINITIONS .
CAUTION:
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.