Chrysler 300M 2002 Service Manual page 2814

Possible causes:
> Engine overheat - refer to service manual for
diagnosis and repair
> Transmission Overheat
– Restricted transmission cooling system
– Transmission fluid overfilled
– Radiator fan not functioning properly
– Extended driving in low gear
NOTE: Strenuous driving conditions may
cause the vehicle to overheat. If the driver
operates in or initiates Autostick with an
overheated vehicle, the code will be set.
Name of code: P0897(73) - Worn Out/Burnt Tran-
saxle Fluid
When monitored: At every Fully Electronically
Modulated Converter Clutch (FEMCC) to Partial
Electronically Modulated Converter Clutch (PEM-
CC) transition miles when A/C compressor clutch is
being cycled.
Set condition: The code will be set if vehicle
shudder is detected 20 times when the A/C clutch is
cycled.
Theory of operation: While in 3rd or 4th FEMCC
and just before the A/C clutch engages, the Power-
train Control Module (PCM) requests the Trans-
mission Control System to momentarily establish
PEMCC operation. If vehicle shudder is detected
during the FEMCC to PEMCC transition, a
counter is incremented. If the count reaches 20, the
trouble code is set. The driver may then notice
harsh bumps when the A/C clutch is being cycled,
but vehicle shudder will be eliminated. After 35
OBDII (EURO STAGE III OBD) warm-up cycles or
if the code is cleared, PEMCC will be reactivated to
see if shudder is still present. If one shudder event
occurs, the code will be reset. Clearing the code and
running battery disconnect with the DRBIII is the
only way to reset the shudder counter from 20 back
to zero.
Transmission Effects: This code does not cause
the transmission to go into Limp-in mode. How-
ever, once the code is set, FEMCC to PEMCC
operation before the A/C clutch engagement will be
disabled for 35 OBDII (EURO STAGE III OBD)
warm up starts.
Possible causes:
> Degraded transmission fluid
> Wheels severely out of alignment
> Internal torque converter problem
Name of code: P1799(74) - Calculated Oil Tem-
perature in Use
When monitored: Whenever the Engine is run-
ning.
GENERAL INFORMATION
Set condition: The code is set if any of the
following conditions exist for three consecutive key
starts:
> The Temperature Sensor voltage is out of range
(below 0.07 volts or greater than 4.94 volts)
> If the PCM senses continuous erratic Tempera-
ture Sensor voltage.
> The Temperature Sensor temperature stays be-
low 27°C (80°F) for an extended period of time.
Theory of operation: The PCM uses a Tempera-
ture Sensor to monitor the transmission sump
temperature. This temperature is used to deter-
mine which shift schedule the PCM is to use. (See
Transmission Operation and Shift Scheduling at
Various Sump Temperatures in this diagnostic
manual) If the Temperature Sensor circuit fails to
operate properly the PCM will use the calculated
oil temperature routine found in prior model year
PCM. If this occurs for three consecutive key
starts, the code will be set. The PCM will then test
the Temperature Sensor circuit after ever 35
OBDII (EURO STAGE III OBD) warm-up cycles. If
the Temperature Sensor circuit is OK, the Temper-
ature Sensor data is used in place of the Calculated
Oil temperature data.
Transmission Effects: If the Transmission Tem-
perature Sensor indicates a temperature below
-18° C (0°F) or above 115° C (240°F) at start up,
The PCM compares the calculated oil temperature
to the indicated Temperature Sensor oil tempera-
ture. If the calculated oil temperature differs sig-
nificantly from the Temperature Sensor value, the
calculated oil temperature will be used for that key
start.
Possible causes:
> Wiring or Connector problems in the transmis-
sion temperature sensor signal circuit.
> TRS
> PCM
Name of code: P0218(75) - High Temperature
Operation Activated. Note: This DTC is an infor-
mational DTC designed to aid the technician in
diagnosing shift quality concerns.
When monitored: Whenever the engine is run-
ning.
Set condition: Immediately once the Overheat
Shift Schedule is activated.
Theory of operation: If the transmission oil
temperature rises above 115°C (240°F), the over-
heat shift schedule is activated refer to Transmis-
sion Operation as a function of Transmission Oil
Temperature and the code is set. The DTC is an
information code only and is being set to aid the
technician in determining root cause of a customer
driveability issue. The code is also intended to alert
the technician to determine if a cooling system
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