Jeep Liberty KJ. Manual — part 1215
GEAR
L/R
2C
4C
UD
OD
D
OP
OP
OP
CL
CL
4TH
OP
OP
CL
OP
CL
5TH
OP
CL
OP
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
NOTE: If the Transmission Solenoid/TRS Assembly is being replaced, the Quick Learn Procedure must be
performed. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/TRANSMISSION CONTROL MOD-
ULE - STANDARD PROCEDURE)
1. Remove the valve body from the transmission.
(Refer to 21 - TRANSMISSION/AUTOMATIC -
45RFE/545RFE/VALVE BODY - REMOVAL)
2. Remove the bolts (1) holding the transmission sole-
noid/TRS assembly onto the valve body.
3. Separate the transmission solenoid/TRS assembly
from the valve body.
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AUTOMATIC TRANSMISSION - 545RFE
KJ
INSTALLATION
1. Place TRS selector plate in the PARK position.
2. Position the transmission solenoid/TRS assembly
onto the valve body. Be sure that both alignment
dowels are fully seated in the valve body and that
the TRS switch contacts are properly positioned in
the selector plate
3. Install the bolts (1) to hold the transmission sole-
noid/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 6 N·m (50 in.lbs.).
5. Tighten the remainder of the solenoid assembly
screws to 6 N·m (50 in.lbs.).
6. Install the valve body into the transmission.
KJ
AUTOMATIC TRANSMISSION - 545RFE
21 - 805
SENSOR-TRANSMISSION TEMPERATURE
DESCRIPTION
The transmission temperature sensor is a thermistor 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 transmission 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 tem-
perature. Calculated temperature is a predicted fluid temperature which is calculated from a combination of inputs:
•
Battery (ambient) temperature
•
Engine coolant temperature
•
In-gear run time since start-up
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AUTOMATIC TRANSMISSION - 545RFE
KJ
BODY-VALVE
DESCRIPTION
The valve body consists of a cast aluminum valve body, a separator plate, and a transfer plate. The valve body
contains valves and check balls that control fluid delivery to the torque converter clutch, bands, and frictional
clutches. The valve body contains the following components :
•
Solenoid switch valve
•
Manual valve
•
Low/reverse switch valve
•
5 Accumulators
•
7 check balls
KJ
AUTOMATIC TRANSMISSION - 545RFE
21 - 807
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