Dodge ZB 2005 Service Manual page 1125

GENERAL INFORMATION
3.2.3 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 off 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 addi-
tional OBD information will be cleared.
Monitor Preliminary Checks:
1. Plug scantool 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 scantool 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 Readi-
ness Status.
*Group 25 of the Service Manual can assist in
determining which faults will illuminate the
MIL Lamp.
With the scantool check for CARB Readiness Sta-
tus:
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.
MONTIOR RUN PROCESS
Outlined below is the Monitor Run Process, in-
cluding 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 DRBIII , 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 DRBIII , 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 SEN-
SOR PRE-TEST in the DRBIII , OBD II Moni-
tors Menu.
5. Purge Monitor
The Purge Free (PF) cells must update on the
PURGE FLOW PRE-TEST screen. For the en-
able 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
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