Chrysler Concorde 2004 Service Manual page 1161

1.0 INTRODUCTION
NOTE:
The 2004 model year, LH, 300M, Intrepid and
Concorde vehicles will integrate the Trans-
mission Control Module and Powertrain Con-
trol Module into a single control module. This
new module is called the Next Generation
Controller (NGC) for DaimlerChrysler and
will be referred to as the Powertrain Control
Module (PCM). The Transmission Control Sys-
tem is part of the Powertrain Control Module.
New Diagnostics procedures and New DTC's
are some of the changes you will see which
reflect the new combined module technology.
The PCM will have four color coded connec-
tors, C1 through C4, (C1-BLK, C2-GRAY, C3-
WHITE, C4-GREEN), each PCM connector will
have 38 pins each. Two new tools are used for
probing and repairing the New PCM connec-
tors. A New tool to release the pins from the
PCM connectors Miller Tool #3638 is intro-
duced, you must use the Miller Tool #3638 tool
to release the connector pins or harness and
connector damage will occur. Also a New tool
for probing connectors Miller Tool #8815 is
introduced, you must use the Miller tool #8815
tool to probe the PCM pins or harness and
connector damage will occur. There are also
new Verification tests and module replace-
ment procedures for the new PCM.
The procedures contained in this manual include
all of the specifications, instructions, and graphics
needed to diagnose 42LE Electronic Automatic
Transmission problems. The diagnostics in this
manual are based on the failure condition or symp-
tom being present at the time of diagnosis.
When repairs are required, refer to the appropri-
ate volume of the service manual for the proper
removal and repair procedure.
Diagnostic procedures change every year. New
diagnostic systems may be added and/or carryover
systems may be enhanced. READ THIS MANUAL
BEFORE TRYING TO DIAGNOSE A VEHICLE
TROUBLE CODE. It is recommended that you
review the entire manual to become familiar with
all new and changed diagnostic procedures.
This book reflects many suggested changes from
readers of past issues. After using this book, if you
have any comments or recommendations, please fill
out the form at the back of the book and mail it back
to us.
1.1 SYSTEM COVERAGE
This diagnostic procedures manual covers all
2004 LH equipped with a 42LE Transmission.
GENERAL INFORMATION
1.2 SIX-STEP TROUBLESHOOTING
PROCEDURE
Diagnosis of the 42LE electronic Transmission is
done in six basic steps:
• verification of complaint
•
verification of any related symptoms
•
symptom analysis
• problem isolation
• repair of isolated problem
•
verification of proper operation
2.0 IDENTIFICATION OF
SYSTEM
Visual identification of vehicles equipped with a 4
speed transmission, the Solenoid/Pressure Switch
Assembly is located on the passenger side, The
Transmission Range Sensor, Input Speed Sensor
and Output Speed Sensor are located on the drivers
side of the transmission. Refer to the Service Infor-
mation for transmission ID tag descriptions.
3.0 SYSTEM DESCRIPTION AND
FUNCTIONAL OPERATION
3.1 GENERAL DESCRIPTION
The 42LE electronic Transmission is a conven-
tional Transmission in that it uses hydraulically
applied clutches to shift a planetary gear train.
However, the electronic control system replaces
many of the mechanical and hydraulic components
used in conventional transmission valve bodies.
3.2 FUNCTIONAL OPERATION
The 42LE electronic Transmission has a fully
adaptive control system. The system performs it's
functions based on continuous real-time sensor
feedback information. The control system automat-
ically adapts to changes in engine performance and
friction element variations to provide consistent
shift quality. The control system ensures that clutch
operation during upshifting and downshifting is
more responsive without increased harshness.
The Powertrain Control Module (PCM) continu-
ously checks for electrical problems, mechanical
problems, and some hydraulic problems. When a
problem is sensed, the PCM stores a diagnostic
trouble code. Some of these codes cause the Trans-
mission to go into Limp-in or default mode. While in
this mode, electrical power is taken away from the
Transmission via the PCM, de-energizing the trans-
1