Glass, Frames and Mechanisms - System Operation and Component Description

motor automatically reverses direction and moves the glass downward.

The window one-touch up/down feature is activated by pulling/pressing the window control switch to the up/down position (second detent). This allows the front door window glass to move upward/downward until it is fully closed/open. A momentary activation of the window control switch, while the window glass is moving upward or downward, stops the front door window glass.

If equipped with a memory driver seat, the master window control switch communicates to the DDM through a LIN. To operate the driver door window, the DDM supplies the applicable voltage signals to the driver door window regulator motor to operate the window in the desired direction. To operate the passenger door window from the master window control switch, the DDM communicates to the PDM through the Medium Speed Controller Area Network (MS-CAN), which then supplies the applicable voltage signals to the passenger door window regulator motor to operate the window in the desired direction. The passenger door window control switch provides ground input signals to the PDM, which then supplies the applicable voltage signals to the passenger door window regulator motor to operate the window in the desired direction.

Global Open

The global open feature can automatically open both door windows and rear quarter windows (convertible) using the RKE transmitter. The global open feature only activates when the ignition is off and the delayed accessory relay is not active. After unlocking the vehicle, pressing and holding the unlock button on the RKE transmitter causes the Body Control Module B (BCM-B) to send a global open signal to each power window regulator motor. When this signal is sent the windows begin to open. If the lock or unlock button on the RKE is pressed while the windows are moving, the window operations will stop.

Short Drop Windows

When the window motor senses a door has been opened (by monitoring its door ajar switch), the window motor opens the window slightly to clear the grooved channel weatherstrip. After the door is closed, the window motor senses the closed door, and the window motor fully closes and seats the window glass into the grooved channel weatherstrip. This function is on both the coupe and the convertible.

Rear Quarter Window Operation - Convertible

Both rear quarter windows operate at the same time when activated by the master window control switch.

Convertible Top Drop Window Function

When the convertible top switch is operated (to raise or lower the convertible top), the Body Control Module B (BCM-B) sends a signal on the global open circuit to the 4 window motors to activate a full down operation of all 4 windows. When the rear quarter windows reach the full DOWN position, the full down sensor in each rear quarter window motor sends a signal to the BCM-B that the windows are in the full DOWN position. At this time, the BCM-B allows the convertible top to operate (up or down). If the BCM-B does not see the full down signal from both rear quarter window motors, the convertible top does not operate. The BCM-B also disables/inhibits the rear quarter window control switch from operating the rear quarter windows when the convertible top is not in the full UP or full DOWN position by sending a message (pulses) on the global open circuit (the front door window motors ignore this message). This function is to prevent an accidental opening of the convertible top with the windows in the UP position causing contact between the windows and convertible top which may result in damage to the convertible top or windows.

Rear Window Defrost

When the rear window defrost switch (integral to the FCIM) is activated, the FCIM activates the rear window defrost relay located in the BJB. When activated, the rear window defrost relay supplies voltage to the rear window defrost grid.

If equipped, the rear window defrost can also be commanded on and off using voice commands or by touching the rear window defrost button located on the touchscreen (FDIM). For additional information on voice or touchscreen commanded features, refer to the Owner's Literature.