Monitor Preliminary Checks

1. Plug a SCAN TOOL into the vehicle's Data Link Connector (DLC).
2. Turn the ignition, KEY ON - ENGINE OFF. Watch for MIL lamp illumination during the bulb check. MIL lamp must have illuminated, if not, repair MIL lamp.
3. On the SCAN TOOL Select #1Stand-alone.
4. Select No.1 1998-2004 Diagnostics.
5. Select No.1 Engine.
6. Select No.2 DTCs and Related Functions.
7. Select No.1 Read DTCs.
- Verify that No Emissions Related DTCs are Present.
- If an Emissions DTC is Present, the OBD II Monitors may not run and the CARB Readiness will not update.
- The Emissions related DTC, will need to be repaired, then cleared. By clearing DTCs, the OBD Monitors will need to be run and completed to set the CARB Readiness Status.
8. Return to Engine Select Function Menu and Select No. 9, OBD II Monitors.
9. Select No. 3 CARB Readiness Status.

Q: Do all the CARB Readiness Status Locations read YES?

YES: then all monitors have been completed and this vehicle is ready to be I/M or Emission Tested.
NO: then the following procedure needs to be followed to run/complete all available monitors.

NOTE:
- Only the monitors, which are not YES in the CARB Readiness Status, need to be completed.
- Specific criteria need to be met for each monitor. Each monitor has a Pre-Test screen to assist in running the monitor. refer to the DaimlerChrysler Corporation Technical Training Workbook titled On Board Diagnostics: OBD II/EOBD, part number 81-699-01050.
- The most efficient order to run the monitors has been outlined below, including suggestions to aid the process.