Chrysler Concorde 2004 Service Manual page 662

GENERAL INFORMATION
OBD II MONITOR RUN PROCESS – NGC
VEHICLES
The following procedure has been established to
assist Technicians in the field with enabling and
running OBD II Monitors. The order listed in the
following procedure is intended to allow the techni-
cian to effectively complete each monitor and to set
the CARB Readiness Status in the least time pos-
sible.
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. NVLD Monitor runs after key off.
B. By performing a Battery Disconnect, or
Selecting Erase DTCs, the CARB Readiness
and all additional OBD II information will be
cleared.
Monitor Preliminary Checks:
1. Plug a DRB III 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. On the DRB III Select #1 DRB III Standalone.
4. Select #1 1998-2002 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 Readi-
ness 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 com-
pleted 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 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.
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 condi-
tions select the EVAP MON PRE-TEST in the
DRBIII , OBD II Monitors Menu. The Purge mon-
itor 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
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. 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 DRB III , OBD II Monitors
Menu.
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