Chrysler Concorde 2004 Service Manual page 1163

> 2nd gear PEMCC above 35 Km/h (22 MPH)
> Above 35 Km/h (22 MPH) the torque converter
will not unlock unless the throttle is closed (i.e. at
80 Km/h (50 MPH) a 4th FEMCC to 3rd FEMCC
shift will be made during a part throttle kick-
down or a 4th FEMCC to 2nd PEMCC shift will
be made at wide open throttle) or if a wide open
throttle 2nd PEMCC to 1 kickdown is made.
Causes for operation in the wrong tempera-
ture shift schedule:
Extreme Cold or Cold shift schedule at start up:
> Temperature Sensor circuit.
> Overheat or Super Overheat shift schedule
after extended operation:
> Operation in city traffic or stop and go traffic
> Engine idle speed too high
> Aggressive driving in low gear
> Trailer towing in OD gear position (use 3
position (or A/S 3rd) if frequent shifting oc-
curs)
> Cooling system failure causing engine to op-
erate over 110°C (230°F)
> Engine coolant temperature stays low too long
- If engine coolant temperature drops below
65°C (150°F), the transmission will disengage
EMCC. Extended operation with the EMCC
disengaged will cause the transmission to
overheat.
> Brake switch issue will cause the EMCC to
disengage. Extended operation with the
EMCC disengaged will cause the transmis-
sion to overheat.
> Transmission fluid overfilled
> Transmission cooler or cooler lines restricted
> Transmission Temperature Sensor circuit
3.3 DIAGNOSTIC TROUBLE CODES
Diagnostic trouble codes (DTC's) are codes stored
by the Powertrain Control Module (PCM) that help
us diagnose Transmission problems. They are
viewed using the DRBIII scan tool.
Always begin by performing a visual inspection of
the wiring, connectors, cooler lines and the trans-
mission. Any obvious wiring problems or leaks
should be repaired prior to performing any diagnos-
tic test procedures. Some engine driveability prob-
lems can be misinterpreted as a transmission prob-
lem. Ensure that the engine is running properly
and that no engine DTC's are present that could
cause a transmission complaint.
If there is a communication bus problem, trouble
codes will not be accessible until the problem is
GENERAL INFORMATION
fixed. The DRBIII
message. The following is a possible list of causes
for a bus problem:
– open or short to ground/battery in PCI bus
circuit.
– internal failure of any module or component on
the bus
Each diagnostic trouble code is diagnosed by
following a specific testing sequence. The diagnostic
test procedures contain step-by-step instructions
for determining the cause of a transmission diag-
nostic trouble code. Possible sources of the code are
checked and eliminated one by one. It is not neces-
sary to perform all of the tests in this book to
diagnose an individual code. These tests are based
on the problem being present at the time that the
test is run.
All testing should be done with a fully charged
battery.
If the PCM records a DTC that will adversely
affect vehicle emissions, it will request (via the
communication bus) that the PCM illuminate the
Malfunction Indicator Lamp (MIL). Although these
DTC's will be stored in the PCM immediately as a 1
trip failure, it may take up to five minutes of
accumulated trouble confirmation to set the DTC
and illuminate the MIL. Three consecutive success-
ful OBDII (EURO STAGE III OBD) trips or clearing
the DTC's with a diagnostic tool (DRBIII or equiv-
alent) is required to extinguish the MIL. When the
transmission control system requests that the en-
gine controller illuminate the MIL, the PCM sets a
DTC P0700 ($89) to alert the technician that there
are DTC's stored in the transmission control sys-
tem. P0700 must also be erased in the PCM in order
to extinguish the MIL.
3.3.1 HARD CODE
Any Diagnostic Trouble Code (DTC) that is set
whenever the system or component is monitored is
a HARD code. This means that the problem is there
every time the PCM checks that system or compo-
nent. Some codes will set immediately at start up
and others will require a road test under specific
conditions. It must be determined if a code is
repeatable (Hard) or intermittent before attempt-
ing diagnosis.
3.3.2 ONE TRIP FAILURES
A One Trip Failure, when read from the PCM, is
a hard OBDII (EURO STAGE III OBD) code that
has not matured for the full 5 minutes. This applies
to codes that will only set after 5 minutes of
substituted gear operation.
3
will display an appropriate