Dodge dakota 2002 Service Manual page 2422

DR
TRANSMISSION SOLENOID/TRS ASSEMBLY (Continued)
545RFE PRESSURE SWITCH STATES
GEAR L/R 2C
R OP OP
P/N CL OP
1ST CL* OP
2ND OP CL
2ND
OP OP
PRIME
D OP OP
4TH OP OP
5TH OP CL
*L/R is closed if output speed is below 100 rpm in
Drive and Manual 2. L/R is open in Manual 1.
A Diagnostic Trouble Code (DTC) will set if the
TCM senses any switch open or closed at the wrong
time in a given gear.
REMOVAL
(1) Remove the valve body from the transmission
(Fig. 127).
Fig. 127 Valve Body Bolts
1 - VALVE BODY TO CASE BOLT (6)
(2) Remove the screws holding the transmission
solenoid/TRS assembly onto the valve body (Fig. 128).
(3) Separate the transmission solenoid/TRS assem-
bly from the valve body.
INSTALLATION
(1) Place TRS selector plate in the PARK position.
(2) Position the transmission solenoid/TRS assem-
bly onto the valve body. Be sure that both alignment
AUTOMATIC TRANSMISSION - 45RFE/545RFE
4C UD OD
OP OP OP
OP OP OP
OP CL OP
OP CL OP
CL CL OP
OP CL CL
CL OP CL
OP OP CL
Fig. 128 Ttransmission Solenoid/TRS Assembly
1 - SOLENOID PACK BOLTS (15)
dowels are fully seated in the valve body and that
the TRS switch contacts are properly positioned in
the selector plate
(3) Install the screws to hold the transmission
solenoid/TRS assembly onto the valve body.
(4) Tighten the solenoid assembly screws adjacent
to the arrows cast into the bottom of the valve body
first. Tighten the screws to 5.7 N·m (50 in.lbs.).
(5) Tighten the remainder of the solenoid assembly
screws to 5.7 N·m (50 in.lbs.).
(6) Install the valve body into the transmission.
TRANSMISSION
TEMPERATURE SENSOR
DESCRIPTION
The transmission temperature sensor is a ther-
mistor that is integral to the Transmission Range
Sensor (TRS).
OPERATION
The transmission temperature sensor is used by
the TCM to sense the temperature of the fluid in the
sump. Since fluid temperature can affect transmis-
sion shift quality and convertor lock up, the TCM
requires this information to determine which shift
schedule to operate in.
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-
21 - 583
Screws