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.
Driver Door Module (DDM)
The DDM uses the SCP communications network. The DDM, instrument cluster, and the LCM share the SCP communications network termination responsibilities. The SCP communications bus may remain operational when one of the termination resistors is not present.
The module controls functions of the power seats, power windows, power locks, and remote keyless entry (RKE). If equipped, both the DDM and LCM communicate to control the perimeter alarm functions.
Check the SCP communications network circuits between the DDM C501a and the DLC C251. The total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms, there is an open circuit in the SCP communications network, damage to the DLC C251, or damage to the DDM C501a.
For additional DDM information, refer to MULTIFUNCTION ELECTRONIC MODULES .
For additional rear view mirror information, refer to REAR VIEW MIRRORS .
For additional power seating information, refer to SEATING .
For additional power window information, refer to GLASS, FRAMES AND MECHANISMS .
For additional RKE information, refer to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS .
For additional perimeter alarm information, refer to ANTI-THEFT - PERIMETER .
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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.