04 Jeep Grand Cherokee Driver Door Module

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The system utilizes door modules in each door that communicate through a data buss called PCI ( Programmable Controller Interface) buss. It is very much like GM's Class 2 data buss.

It is a peer to peer network meaning that any module on the network has the ability to communicate on it's own. Both the DDM ( Drivers door Module) and PDM ( Passenger Door Module) share a common power and ground feed as well.

Looking through the service information I also come across this- I underlined the important tidbit of information. The DDM and PDM each utilize integrated circuitry and information carried on the Programmable Communications Interface (PCI) data bus network along with many hard wired inputs to monitor many sensor and switch inputs throughout the vehicle. The PDM also receives inputs through an integral Radio Frequency (RF) Remote Keyless Entry (RKE) receiver. The DDM and PDM control and integrate many functions and features of the vehicle through both hard wired outputs and messages over the PCI data bus. We also know that at least our source for power and source for ground is good since we have proper drivers side window and lock operation. So what is next?

There it is a broken feed wire in the passenger side bellows between door and A pillar. Gemini Pattern Editor Keygen Free. Checking the other wires in the harness and they were all good. A quick repair of the wire and reassembly and all is well. The RKE worked like a charm as well. The shop owner was more than happy. This car was fixed with no parts and quickly. It is a bit unusual to see this sort of failure on the passenger side.