Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Next Generation Controller
New for 2003 for models equipped with the 2.4L is a combined Powertrain Control Module (PCM) and Transmission Control Module (TCM) in a single control module. This new module is the Next Generation Controller (NGC) for Daimler Chrysler and will be referred to as the 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-Black, C2-Black, C3-Black, C4-Dark 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. The Miller Terminal Removal Pick (3638) is introduced, you must use the Miller (3638) tool to release the connector terminals or harness and connector damage will occur. Also, the Miller Pinout Box (8815) 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.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.