Chrysler 300M 2002 Service Manual page 2430

IMPORTANT
New for the 2002 LH is a combined
Powertrain Control Module and Transmission
Control Module in a single control module.
This new module is the Next Generation
Controller (NGC) for DaimlerChrysler and will
be referred to as the Powertrain Control
Module (PCM).
New Diagnostics procedures and New DTC
numbers are some of the changes you will
see which reflect the new combined module
technology. The PCM will have four color
coded connectors C1 through C4, (C1-BLK,
C2-GRAY, C3-WHITE, C4-GREEN), each PCM
connector will have 38 pins each. Two new
tools are introduced to help in diagnosing
and repairing the new PCM terminals and
harness connectors.
terminal removal pick is introduced, you
must use the Miller #3638 tool to release the
connector terminals
connector damage will occur. Also, the Miller
#8815 Pinout Box is introduced, you must
use the Miller #8815 tool to probe the PCM
terminals or terminal damage will occur.
There is also a new Verification test and
module replacement procedure for the new
PCM.
1.0 INTRODUCTION
The procedures contained in this manual include
specifications, instructions, and graphics needed to
diagnose the PCM Powertrain System. The diag-
nostics in this manual are based on the failure
condition or symptom being present at time of
diagnosis.
Please follow the recommendations below when
choosing your diagnostic path.
1. First make sure the DRBIII is communicating
with the appropriate modules; ie., if the DRBIII
displays a No Response condition, you must
diagnose this first before proceeding.
2. Read DTC's (diagnostic trouble codes) with the
DRBIII .
3. If no DTC's are present, identify the customer
complaint.
4. Once the DTC or customer complaint is identi-
fied, locate the matching test in the Table of
Contents and begin to diagnose the symptom.
All component location views are in Section 8.0.
All connector pinouts are in Section 9.0. All system
schematics are in Section 10.0.
The Miller #3638
or harness and
GENERAL INFORMATION
An * placed before the symptom description indi-
cates a customer complaint.
When repairs are required, refer to the appropri-
ate service information for the proper removal and
repair procedure.
Diagnostic procedures change every year. New
diagnostic systems may be added; carryover sys-
tems may be enhanced. READ THIS DIAGNOSTIC
INFORMATION BEFORE TRYING TO DIAG-
NOSE A VEHICLE CODE. It is recommended that
you review the entire diagnostic information to
become familiar with all new and changed diagnos-
tic procedures.
If you have any comments or recommendations
after reviewing the diagnostic information, 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 the
2002 LH vehicle equipped with the 2.7L and 3.5L
engines.
1.2 SIX-STEP TROUBLESHOOTING
PROCEDURE
Diagnosis of the powertrain control module
(PCM) 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
The Powertrain Control Module (PCM) monitors
and controls:
•
Fuel System
• Idle Air Control System
• Ignition System
• Charging System
•
Speed Control System
• Cooling system
1