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Summary of Monitor Information

OBDII Monitor Operation:





JTEC CONTROLLED REAR WHEEL DRIVE VEHICLES
The following procedure has been established to assist Dealer Technicians in the field with enabling and running OBD II 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 oft the ignition. By turning the ignition key off, monitor enabling conditions will be lost.
b. By performing a Battery Disconnect, or Selecting Erase DTCs, the CARB Readiness and all additional OBD information will be cleared.

Monitor Preliminary Checks:
1. Plug Scan tool into the vehicle's 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. With the Scan tool check for any DTCs
- Verify that No Emissions Related DTCs are Present and MIL is not illuminated.
- If an Emissions DTC is Present and the MIL is ON, the OBD II Monitors may not run and the CARB Readiness will not update.
- The Emissions related DTC, which is causing the MIL, 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.
- Group 25 of the Service Manual can assist in determining which faults will illuminate the MIL Lamp.

With the Scan tool check for 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 I/M or Emission Tested.
- NO, then the following procedures will aid in running and completing all available monitors.

MONITOR RUN PROCESS
Outlined below is the Monitor Run Process, including suggestions and tips in order to aid in the process of meeting the enabling criteria to allow any of these monitors to run.


NOTE: The most efficient order has been outlined below. The first two monitors have very similar enable criteria. It is possible that the Evaporative Leak Detection Monitor will run during the O2 Sensor Heater Monitor.


1. O2 Sensor Heater Monitor
This monitor requires a cold start, usually an overnight soak or parked for at least 8 hours without the engine running. The engine coolant temperature must be within 10 degrees of ambient/battery temperature, and the sensed Ambient (outside temperature) must be between approximately 0 F and 100 F. For the monitor run conditions,

2. Evaporative Leak Detection Monitor (If the vehicle is equipped with an LDP system)
This monitor requires a cold start, usually an overnight soak or parked for at least 8 hours without the engine running. The engine coolant temperature must be within 10 degrees of ambient/battery temperature, and the sensed Ambient (outside) Temperature must be between approximately 40 F and 90 F. For the monitor run conditions select the EVAP LEAK PRE-TEST in the DRB III, OBD II Monitors Menu.

3. Catalyst Monitor
The vehicle will need to be driven at highway speed for a few minutes (approximately 35 to 40 mph for 2.5L and 4.0L engines, 50 to 60 mph for all others). 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 CATALYST PRE-TEST in the DRB III, OBD II Monitors Menu.

4. O2 Sensor Monitor
The vehicle will need to be driven for a period of time (approximately 35 to 40 mph for 2.5L and 4.0L engines, 50 to 60 mph for all others) and brought to a stop for a short period of time (with the Automatic Transmission left in Drive. The O2 Monitor will not run in Park or Neutral on an Automatic Transmission equipped vehicle). For the monitor run conditions, select the O2 SENSOR PRE-TEST in the DRB III, OBD II Monitors Menu.

5. Purge Monitor
The Purge Free (PF) cells must update on the PURGE FLOW PRE-TEST screen. For the enable conditions, select "F1" while looking at the PURGE FLOW PRE-TEST screen. Similar Test conditions as the O2 Sensor Monitor, that is, Normal Operating Temperature, come to a stop while leaving the Automatic Transmission in Drive (not Park or Neutral). The Purge Flow Monitor will attempt to run every OTHER Throttle Closure. If all of the parameters are met and it still does not run, with your foot firmly on the Service Brake, slightly (1/4) open the Throttle and quickly close the Throttle. This will allow the Purge Free update to happen, and then the Purge Flow Monitor will Run.

OBDII MONITOR RUN PROCESS NGC VEHICLES
The following procedure has been established to assist Chrysler Dealer Technicians in the field with enabling and running OBD II 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:
c. 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. NVLD Monitor runs after key off.
d. By performing a Battery Disconnect, or Selecting Erase DTCs, the CARB Readiness and all additional OBD II information will be cleared.


Monitor Preliminary Checks:
4. Plug a DRBIII(R) into the vehicle's DLC.
5. 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.
6. On the DRBIII(R) Select #1 DRBIII(R) Stand alone.
7. Select #1 1998-2003 Diagnostics
8. Select #1 Engine
9. Select #2 DTCs and Related Functions
10. 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 CARE 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.
11. Return to Engine Select Function Menu and Select #9, OBD II Monitors.
12. Select #3 CARE Readiness Status.

Do all the CARE 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:
a. Only the monitors, which are not YES in the CARB Readiness Status, need to be completed.
b. Specific criteria need to be met for each monitor. 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.
c. The most efficient order to run the monitors has been outlined below, including suggestions to aid the process.

1. 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 DRBIII(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.

2. 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. Some trucks run the monitor at idle in drive. 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 DRBIII(R), OBD II Monitors Menu.

3. 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 PRE-TEST in the DRBIII(R), OBD II Monitors Menu.

4. 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 PRE-TEST in the DRBIII(R), OBD II Monitors Menu.
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