Door Module: Operation: Notes

WARNING: This page is about a different car, the 2004 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

The microprocessor-based DDM and PDM hardware and software monitors integral and hard wired external switch inputs as well as those resources it shares with other electronic modules in the vehicle through its communication over the PCI data bus network. The internal programming and all of these inputs allow the DDM or PDM microprocessor to determine the tasks it needs to perform and their priorities, as well as both the standard and optional features that it should provide.

The DDM and PDM are powered by a fused battery circuit so that they can operate regardless of the ignition switch position. The DDM and PDM circuitry is grounded to the chassis beneath the front seat.

The DDM and PDM can be diagnosed using a DRBIII(R) scan tool. Refer to the appropriate diagnostic information.