Grand Cherokee 2WD L6-4.0L VIN S (1997)
Power Window 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. 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.
The DDM circuitry controls the output to the driver side front and rear door power windows. The PDM circuitry controls the output to the
passenger side front and rear door power windows. The DDM can control the PDM output by sending control messages to the PDM over the CCD
data bus.
Some of the features and functions of the power window system made possible because of the communication of the door modules on the CCD
data bus network include:
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Power window operation after ignition off feature.
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Power window lockout function.
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Power window switch LED illumination control function.
For diagnosis of the DDM, PDM, or the CCD data bus network, refer to the proper Computers and Control Systems/Body Control Module/Testing
and Inspection Procedures.
