Fuel System/Misfire Monitor Verification Test

FUEL SYSTEM/MISFIRE MONITOR VERIFICATION TEST

Applicability - All

1. If any existing DTC's have not been repaired, go to Symptom List and follow path specified.

2. Inspect the vehicle to ensure that all engine components are properly installed and connected. Reassemble and reconnect components as necessary.

3. Connect the DRB III to the Data Link Connector.

4. Ensure the fuel tank has at least 1/4 tank of fuel. Turn off all accessories.

5. Perform steps 6 through 8 if the PCM has been replaced, then proceed with the verification. If the PCM has not been replaced, skip those steps and continue verification.

6. If PCM has been changed and correct VIN and mileage have not been programmed, a DTC will be set in ABS and Airbag modules. In addition, if vehicle is equipped with a Sentry Key Immobilizer Module (SKIM), Secret Key data must be updated to enable start.

7. For ABS and Airbag systems: Enter correct VIN and Mileage in PCM. Erase codes in ABS and Airbag modules.

8. For SKIM theft alarm: Connect DRB III to the Data Link Connector. Go to Theft Alarm, SKIM, Misc. and place SKIM in secured access mode by using the appropriate PIN code for this vehicle. Select Update the Secret Key data. Data will be transferred from SKIM to PCM.

9. NOTE: Make sure that Misfire detection is enabled if you repaired a Misfire DTC. Low fuel level or an un-learned Adaptive Numerator can disable the Misfire monitor.

10. NOTE: If the PCM has been replaced or disconnected during testing, the Adaptive Numerator must be re-learned in order for the Misfire Monitor to run.

11. With the DRB III, monitor the Similar Conditions to attempt to duplicate the conditions that the vehicle was operating at when the DTC was set. If the conditions can be duplicated, the Good Trip counter will change to one or more.

12. If the conditions cannot be duplicated, erase trouble codes and disconnect the DRB.

13. If the repaired DTC has reset, or the OBD II monitor failed after running, the repair is not complete. Check for any technical service bulletins or flash updates and return to Symptom List.

14. If a new DTC has set, return to Symptom List and perform the tests specified for that code.

15. If the monitor ran, and the Good Trip counter changed to one or more, the repair was successful.

16. Erase DTC's.

17. Disconnect the DRB III. Test complete.