Installation - Chrysler 2004 Concorde Service Manual

21 - 142 TRANSAXLE
SOLENOID/PRESSURE SWITCH ASSY (Continued)
help the PCM detect when clutch circuit hydraulic
failures occur. The range for the pressure switch clos-
ing and opening points is 11-23 psi. Typically the
switch opening point will be approximately one psi
lower than the closing point. For example, a switch
may close at 18 psi and open at 17 psi. The switches
are continuously monitored by the PCM for the cor-
rect states (open or closed) in each gear as shown in
the following chart:
PRESSURE SWITCH STATES
GEAR L/R
R OP
P/N CL
1st CL
2nd OP
D OP
OD OP
OP = OPEN
CL = CLOSED
A Diagnostic Trouble Code (DTC) will set if the
PCM senses any switch open or closed at the wrong
time in a given gear.
The PCM also tests the 2/4 and OD pressure switches
when they are normally off (OD and 2/4 are tested in
1st gear, OD in 2nd gear, and 2/4 in 3rd gear). The test
simply verifies that they are operational, by looking for
a closed state when the corresponding element is
applied. Immediately after a shift into 1st, 2nd, or 3rd
gear with the engine speed above 1000 rpm, the PCM
momentarily turns on element pressure to the 2/4
and/or OD clutch circuits to identify that the appropri-
ate switch has closed. If it doesn't close, it is tested
again. If the switch fails to close the second time, the
appropriate Diagnostic Trouble Code (DTC) will set.
REMOVAL
NOTE: If the Solenoid/Pressure Switch Assembly is
being replaced, the Quick Learn Procedure must be
performed. (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/POWERTRAIN
MODULE - STANDARD PROCEDURE)
(1) Raise vehicle on hoist.
(2) Remove valve body assembly from transaxle.
(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTO-
MATIC - 42LE/VALVE BODY - REMOVAL)
(3) Remove Solenoid/Pressure Switch Assembly
retaining screws from solenoid (Fig. 380).
(4) Remove Solenoid/Pressure Switch Assembly
and screen from valve body (Fig. 381).
2/4 OD
OP OP
OP OP
OP OP
CL OP
OP CL
CL CL
CONTROL
Fig. 380 Solenoid Retaining Screws
1 - SOLENOID/PRESSURE SWITCH ASSEMBLY
2 - RETAINING SCREWS
Fig. 381 Solenoid/Pressure Switch Assembly and
1 - SOLENOID/PRESSURE SWITCH ASSEMBLY
2 - VALVE BODY
3 - SCREEN

INSTALLATION

NOTE: If the Solenoid/Pressure Switch assembly is
being replaced, the Quick Learn Procedure must be
performed. (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/POWERTRAIN
MODULE - STANDARD PROCEDURE)
(1) Install Solenoid/Pressure Switch Assembly and
screen to the separator and transfer plates (Fig. 381).
(2) Install and tighten retaining screws (Fig. 380)
to 6 N·m (35 in. lbs.) torque.
(3) Install valve body. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC
BODY - INSTALLATION)
Screen
CONTROL
- 42LE/VALVE
LH