Summary of Monitor Information

OBD II/Euro Stage III OBD Monitor Information:

OBDII Monitor Run Process

NGC Vehicles
The following procedure has been established to assist Technicians in the field with enabling and running OBDII Monitors. The order listed in the following procedure is intended to allow the technician to effectively complete each monitor and to set the CARB Readiness Status in the least time possible.

NOTE:
A. Once the monitor run process has begun, do not turn off the ignition. By turning the ignition key off; monitor enabling conditions will be lost. The NVLD Monitor runs after key off.
B. By performing a Battery Disconnect, or Selecting Erase DTCs, the CARB Readiness and all additional OBDII information will be cleared.

Monitor Preliminary Checks:
1. Plug a DRBIII(R) into the vehicle's DLC.
2. Turn the ignition to the RUN POSITION. Watch for MIL lamp illumination during the bulb check. MIL lamp must have illuminated, if not, repair MIL lamp.
3. On the DRB III(R) Select #1 DRB III Stand-alone.
4. Select #1 1998-2005 Diagnostics
5. Select #1 Engine
6. Select #2 DTCs and Related Functions
7. Select #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 #9, OBD II Monitors.
9. Select #3 CARB Readiness Status.

Do all the CARB Readiness Status Locations read YES?
- YES, then all monitors have been completed and this vehicle is ready to be uM or Emission Tested.
- NO, then the following procedure needs to be followed to run/complete all available monitors.

NOTE:
A. Only the monitors, which are not YES in the CARB Readiness Status, need to be completed.
B. Specific criteria must be met for each monitor to run. Each monitor has a Pre-Test screen to assist in running the monitor.

For additional information, refer to the Chrysler Corporation Technical Training Workbook titled On Board Diagnostics: OBDII/EOBD, part number 81-699-01050.

The most efficient order to run the monitors has been outlined below, including suggestions to aid the process.

A. NATURAL VACUUM LEAK DETECTION WITH PURGE MONITOR
This monitor requires a cool down cycle, usually an overnight soak for at least 8 hours without the engine running. The ambient temperature must decrease overnight - parking the vehicle outside is advised. To run this test the fuel level must be between 15-85% full. For the monitor run conditions select the EVAP MON PRE-TEST in the DRB III(R), OBD II Monitors Menu. The Purge monitor will run if the small leak test reports a pass. Criteria for NVLD monitor

1. Engine off time greater than @ one hour
2. Fuel Level between 15% and 85%
3. Start Up ECT and IAT within 10° C (18° F).
4. Vehicle started and run until Purge Monitor reports a result.

NOTE: If the vehicle does not report a result and the conditions where correct. It may take up to two weeks to fail the small leak monitor. DO NOT use this test to attempt to determine a fault. Use the appropriate service information procedure for finding a small leak. If there are no faults and the conditions are correct this test will run and report a pass. Note the Small leak test can find leaks less than 10 thousands of an inch. If a small leak is present it takes approximately one week of normal driving to report a failure.

B. CATALYST/O2 MONITOR
With NGC, Catalyst and O2 Monitor information are acquired and processed at the same time. Most vehicles will need to be driven at highway speed (<50 mph) for a few minutes. If the vehicle is equipped with a manual transmission, using 4th gear may assist in meeting the monitor running criteria. For the monitor run conditions, select the BANK 1 CAT MON PRE-TEST in the DRB III(R), OBD II Monitors Menu.

C. EGR MONITOR
The EGR monitor now runs in a closed throttle decel or at idle on a warm vehicle. However, it is necessary to maintain the TPS, Map and RPM ranges to allow the monitor to complete itself. For the monitor run conditions, select the EGR PRETEST in the DRB III(R), OBD II Monitors Menu.

D. O2 SENSOR HEATER MONITOR
This monitor is now continuously running once the heaters are energized. Pass information will be processed at power down. For the monitor run conditions, select the O2S HEATER MON PRETEST in the DRB III(R), OBD II Monitors Menu.