Chrysler 2004 Concorde Service Manual page 1617

LH
EMISSIONS CONTROL (Continued)
Enabling Conditions—The following conditions
must typically be met before the PCM runs the cat-
alyst monitor. Specific times for each parameter may
be different from engine to engine.
• Accumulated drive time
• Enable time
• Ambient air temperature
• Barometric pressure
• Catalyst warm-up counter
• Engine coolant temperature
• Accumulated throttle position sensor
• Vehicle speed
• MAP
• RPM
• Engine in closed loop
• Fuel level
Pending Conditions—
• Misfire DTC
• Front Oxygen Sensor Response
• Front Oxygen Sensor Heater Monitor
• Front Oxygen Sensor Electrical
• Rear Oxygen Sensor Rationality (middle check)
• Rear Oxygen Sensor Heater Monitor
• Rear Oxygen Sensor Electrical
• Fuel System Monitor
• All TPS faults
• All MAP faults
• All ECT sensor faults
• Purge flow solenoid functionality
• Purge flow solenoid electrical
• All PCM self test faults
• All CMP and CKP sensor faults
• All injector and ignition electrical faults
• Idle Air Control (IAC) motor functionality
• Vehicle Speed Sensor
• Brake switch
• Intake air temperature
Conflict—The catalyst monitor does not run if any
of the following are conditions are present:
• EGR Monitor in progress
• Fuel system rich intrusive test in progress
• EVAP Monitor in progress
• Time since start is less than 60 seconds
• Low fuel level
• Low ambient air temperature
• Ethanel content learn is taking place and the
ethenal used once flag is set
Suspend—The Task Manager does not mature a
catalyst fault if any of the following are present:
• Oxygen Sensor Monitor, Priority 1
• Upstream Oxygen Sensor Heater, Priority 1
• EGR Monitor, Priority 1
• EVAP Monitor, Priority 1
• Fuel System Monitor, Priority 2
• Misfire Monitor, Priority 2
EMISSIONS CONTROL 25 - 5
DESCRIPTION - VEHICLE EMISSION CONTROL
INFORMATION LABEL
All models have a Vehicle Emission Control Infor-
mation (VECI) Label. Chrysler permanently attaches
the label in the engine compartment. It cannot be
removed without defacing information and destroying
the label.
The label contains the vehicle's emission specifica-
tions and vacuum hose routings. All hoses must be
connected and routed according to the label.
DESCRIPTION - TRIP DEFINITION
A "Trip" means vehicle operation (following an
engine-off period) of duration and driving mode such
that all components and systems are monitored at
least once by the diagnostic system. The monitors
must successfully pass before the PCM can verify
that a previously malfunctioning component is meet-
ing the normal operating conditions of that compo-
nent. For misfire or fuel system malfunction, the
MIL may be extinguished if the fault does not recur
when monitored during three subsequent sequential
driving cycles in which conditions are similar to
those under which the malfunction was first deter-
mined.
Anytime the MIL is illuminated, a DTC is stored.
The DTC can self erase only after the MIL has been
extinguished. Once the MIL is extinguished, the
PCM must pass the diagnostic test for the most
recent DTC for 40 warm-up cycles (80 warm-up
cycles for the Fuel System Monitor and the Misfire
Monitor). A warm-up cycle can best be described by
the following:
• The engine must be running
• A rise of 40°F in engine temperature must occur
from the time when the engine was started
• Engine coolant temperature must crossover
160°F
• A "driving cycle" that consists of engine start up
and engine shut off.
Once the above conditions occur, the PCM is con-
sidered to have passed a warm-up cycle. Due to the
conditions required to extinguish the MIL and erase
the DTC, it is most important that after a repair has
been made, all DTC's be erased and the repair veri-
fied by running 1–good trip.
OPERATION - NON-MONITORED CIRCUITS
The PCM does not monitor all circuits, systems
and conditions that could have malfunctions causing
driveability problems. However, problems with these
systems may cause the PCM to store diagnostic trou-
ble codes for other systems or components. For exam-
ple, a fuel pressure problem will not register a fault
directly, but could cause a rich/lean condition or mis-