Chrysler Sebring 2005 Service Manual page 1591

21 - 180 40TE AUTOMATIC TRANSAXLE
TRANSMISSION RANGE SENSOR (Continued)
Fig. 326 Transmission Range Sensor (TRS)
1 - TRANSMISSION RANGE SENSOR
Fig. 327 Transmission Temperature Sensor
1 - TRANSMISSION RANGE SENSOR
2 - TEMPERATURE SENSOR
OPERATION
The Transmission Range Sensor (TRS) (Fig. 326)
communicates shift lever position (SLP) to the PCM/
TCM as a combination of open and closed switches.
Each shift lever position has an assigned combina-
tion of switch states (open/closed) that the PCM/TCM
receives from four sense circuits. The PCM/TCM
interprets this information and determines the
appropriate transaxle gear position and shift sched-
ule.
Location
Since there are four switches, there are 16 possible
combinations of open and closed switches (codes).
Seven of these codes are related to gear position and
three are recognized as "between gear" codes. This
results in six codes which should never occur. These
are called "invalid" codes. An invalid code will result
in a DTC, and the PCM/TCM will then determine the
shift lever position based on pressure switch data.
This allows reasonably normal transmission opera-
tion with a TRS failure.
TRS SWITCH STATES
SLP T42
P CL
R CL
N CL
OD OP
3 OP
L CL
TRANSMISSION TEMPERATURE SENSOR
The TRS has an integrated thermistor (Fig. 327)
that the PCM/TCM uses to monitor the transmis-
sion's sump temperature. Since fluid temperature
can affect transmission shift quality and convertor
lock up, the PCM/TCM requires this information to
determine which shift schedule to operate in. The
PCM also monitors this temperature data so it can
energize the vehicle cooling fan(s) when a transmis-
sion "overheat" condition exists. If the thermistor cir-
cuit fails, the PCM/TCM will revert to calculated oil
temperature usage.
CALCULATED TEMPERATURE
A failure in the temperature sensor or circuit will
result in calculated temperature being substituted for
actual temperature. Calculated temperature is a pre-
dicted fluid temperature which is calculated from a
combination of inputs:
• Battery (ambient) temperature
• Engine coolant temperature
• In-gear run time since start-up
REMOVAL
(1) Remove valve body assembly from transaxle.
(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTO-
MATIC - 41TE/VALVE BODY - REMOVAL)
(2) Remove transmission range sensor retaining
screw and remove sensor from valve body (Fig. 328).
(3) Remove TRS from manual shaft.
T41 T3
CL CL OP
OP OP OP
CL OP CL
OP OP CL
OP CL OP
OP CL CL
JR
T1