Power Liftgate System Inhibitors

WARNING: This page is about a different car, the 2004 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.

The Power Liftgate may not operate properly in extreme temperatures. These extreme temperatures will be approximately -12° F (-30° C) on the low side and 143° F (62° C) for the high side. A chime/thermister assembly in the rear light bar assembly monitors the outside temperature.
The vehicle's transmission must be in park or neutral for the power liftgate to operate.
The vehicle's electrical system voltage must be within specification for the power liftgate system to operate. A low-voltage cut-off is built into the power liftgate system to prevent the vehicle's battery from discharging to the point were the vehicle cannot be operated.
If multiple obstacles are detected during the same power open or close cycle, the liftgate will temporarily go into full manual operation.
If severe Diagnostic Trouble Codes (DTC's) are stored in the power liftgate control module the system may not operate.