Automatic Transmission Diagnostic Procedures: Introduction: Notes
The 2004 model year CS vehicles will integrate the Transmission Control Module and Powertrain Control Module into a single control module. This new module is the Next Generation Controller for DaimlerChrysler and will be referred to as the Powertrain Control Module (PCM).
Some of the changes you will see are several new Diagnostics Trouble Codes and supporting diagnostic procedures 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. Two new tools are used for probing and repairing the new PCM connectors. Miller tool #3638, and Miller tool #8815. Miller tool #3638 is designed to release the pins from the PCM harness connectors. You must use the Miller tool #3638 to release the harness connector terminals or harness connector or terminal damage will occur. Miller tool #8815 was designed for probing the PCM harness connectors. You must use Miller tool #8815 for probing the PCM terminals or damage to the terminal will occur resulting in a poor terminal to pin connection. There are also new Verification tests and module replacement procedures for the new PCM.
The procedures contained in this article include all of the specifications, instructions, and graphics needed to diagnose 41TE (NGC) Electronic Automatic Transmission problems. The diagnostics in this article are based on the failure condition or symptom being present at the time of diagnosis.
When repairs are required, refer to OVERHAUL - 41AE/TE 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 ARTICLE BEFORE TRYING TO DIAGNOSE A VEHICLE TROUBLE CODE. It is recommended that you review the entire article 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.