Windows: Description and Operation

INTRODUCTION
Power windows are standard factory-installed equipment on this model. This covers diagnosis and service of only the electrical components in the power window system.

Power Window System
The power window system allows each of the door windows to be opened or closed by operating a switch on the trim panel for that door. The master switches on the driver side front door trim panel can be operated to open or close any of the door windows. In addition, a lockout switch on the driver side front door trim panel allows the driver to disable all of the passenger door window switches.

The power window system includes the Driver Door Module (DDM) and Passenger Door Module (PDM), which are mounted in their respective front door, the switches mounted on the rear doors, and the power window motors mounted to the window regulator in each door. In addition, several features and functions of the power window system are made possible because of the communication of the DDM and PDM on the Chrysler Collision Detection (CCD) data bus network.

The power window system operates with battery power supplied through a circuit breaker in the junction block, only when the ignition switch is in the On position. However, a unique feature of this system will allow the power windows to be operated for up to thirty seconds after the ignition switch is turned to the Off position, or until a front door is opened, whichever occurs first.

An auto-down feature allows the driver side front door window to be lowered all the way, even if the window switch is released. The driver side front door window switch must be depressed in the down direction to a second detent to begin an auto-down event. Depressing the switch again in any direction will stop the window movement and cancel the auto-down event.

SYSTEM OPERATION
Power Window Switch
The power windows are controlled by a two-way momentary switch mounted on the trim panel of each passenger door, and four two-way momentary switches on the driver side front door trim panel. The driver side front door trim panel also has a two-position power window lockout switch.

Each power window switch, except the lockout switch, is illuminated by a Light-Emitting Diode (LED) when the ignition switch is turned to the On position. However, when the lockout switch is placed in the Lock position, the LED for the locked-out front and rear passenger door power window switches is turned off.

The front door power window switches and the power window lockout switch are integral to the Driver Door Module (DDM) or Passenger Door Module (PDM), respectively. These power window switches provide an up or down (or lock and unlock signal in the case of the lockout switch) to the door module circuitry.

The DDM circuitry controls the output to the driver side front and rear door power window motors, and supplies electrical current as required for the stand-alone operation of the driver side rear door power window switch. The PDM circuitry controls the output to the passenger side front and rear door power window motors, and supplies electrical current as required for the stand-alone operation of the passenger side rear door power window switch. When a DDM-integrated power window switch for a passenger side window is actuated, the DDM circuitry sends a message to the PDM on the Chrysler Collision Detection (CCD) data bus to activate the output to that power window motor(s).

The front door power window switches and their lamps cannot be repaired so, if faulty or damaged, the entire door module must be replaced. The rear door power window switches and their lamps cannot be repaired but, if faulty or damaged, only the affected rear door switch must be replaced.

Door Module
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 houses both the front power lock and power window switches. The DDM also houses individual switches for each passenger door power window, a power window lockout switch and 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.

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:
- Power window operation after ignition off feature.
- Power window lockout function.
- Power window switch LED illumination control function.

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.

Body Control Module
A Body Control Module (BCM) is used on this model to control and integrate many of the electronic functions and features included on the vehicle. The BCM contains a central processing unit and interfaces with other modules in the vehicle 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, reduce internal controller hardware, and reduce component sensor current loads. At the same time, this system provides increased reliability, enhanced diagnostics, and allows the addition of many new feature capabilities.

One of the functions and features that the BCM supports and controls, is the power window system. The BCM receives inputs from the ignition switch and the door ajar switches. The programming in the BCM allows it to process the information from these inputs and send ignition switch and door ajar status messages to the Driver Door Module (DDM) and the Passenger Door Module (PDM) on the CCD data bus. The DDM and PDM use this information to control the lighting of the power window switch lamps, and to control the operation of the power window after ignition-off feature.

The BCM is mounted under the driver side outboard end of the instrument panel, behind the instrument panel support armature and below the outboard switch pod. Refer to Instrument Panel, Gauges and Warning Indicators/Instrument Panel Systems for the removal and installation procedures. For diagnosis of the BCM or the CCD data bus, the use of a DRB scan tool and the proper Diagnostic Procedures are recommended. The BCM can only be serviced by an authorized electronic repair station. Refer to the latest Warranty Policies and Procedures for a current listing of authorized electronic repair stations.

Power Window Motor
A permanent magnet reversible motor moves the window regulator through an integral gearbox mechanism. A positive and negative battery connection to the two motor terminals will cause the motor to rotate in one direction. Reversing the current through these same two connections will cause the motor to rotate in the opposite direction.

In addition, each power window motor is equipped with an integral self-resetting circuit breaker to protect the motor from overloads. The power window motor and gearbox assembly cannot be repaired and, if faulty or damaged, the entire motor assembly must be replaced.

Circuit Breaker
An automatic resetting circuit breaker in the junction block is used to protect the power window system circuit. The circuit breaker can protect the system from a short circuit, or from an overload condition caused by an obstructed or stuck window glass or regulator.

The circuit breaker cannot be repaired and, if faulty, it must be replaced.