Power Mirror Control Module: Description and Operation

SYSTEM OPERATION
A Driver Door Module (DDM) and a Passenger Door Module (PDM) are used on this model to control and integrate many of the electronic features and functions on the vehicle. Each door module contains the power mirror control logic for the mirror on its respective door. The DDM also houses the power mirror switch.

The DDM and PDM communicate with each other, and with other vehicle modules on the Chrysler Collision Detection (CCD) data bus network. The CCD data bus network allows the sharing of sensor information. This helps to reduce wire harness complexity, internal controller hardware, and component sensor current loads. At the same time, this system provides increased reliability, enhanced diagnostics, and allows the addition of many new feature capabilities.

Each door module controls the positioning of its respective outside mirror through hard-wired outputs to that mirror. When the power mirror switch on the DDM is used to position the passenger side outside mirror, the DDM sends mirror positioning messages to the PDM on the CCD data bus. The PDM then moves the passenger side mirror accordingly.

Both the PDM and DDM respond to the defogger switch status messages sent by the Body Control Module (BCM) on the CCD data bus to control the heater elements of their respective mirrors.Refer to Window and Glass/Heated Glass Element/Electrically Heated Systems for more information on this feature.

On models equipped with the optional memory system, each door module also receives a hard-wired input from the two power mirror motor position sensors integral to the mirror. The door module then stores the Driver 1 and 2 mirror position information for its respective mirror. when the DDM receives a Driver 1 or 2 signal from the memory switch on the driver side front door trim panel or from the Remote Keyless Entry (RKE) receiver in the PDM, the DDM positions the driver side mirror and sends a memory recall message back to the PDM on the CCD data bus to position the passenger side mirror.

For diagnosis of the DDM, PDM, or the CCD data bus network, a DRB scan tool and the proper Diagnostic Procedures are recommended. The DDM and the PDM cannot be repaired and, if damaged or faulty, they must be replaced.