Durango 4WD V8-4.7L VIN P Flex Fuel (2007)
Trunk / Liftgate Motor: Description and Operation
Power Liftgate Drive Unit
Description
DESCRIPTION
Vehicles equipped with a power liftgate system, utilize a power liftgate drive unit (3). The drive unit assembly consists of a DC motor, gear position
sensor, clutch, full-open switch, housing/bracket assembly and wire harness. The clutch and motor portion of the assembly provides the power and torque
required to open or close the liftgate (5) under most conditions. The Hall Effect position sensor is used to provide the liftgate control module with a
clutch/motor speed signal. This speed signal is used to monitor any resistance of liftgate travel and allows the liftgate control module to detect
obstructions and control the liftgate accordingly. The clutch assembly is used to allow automatic power open/close mode and full manual operation, if
desired. The full-open switch is used to let the liftgate control module know when the liftgate is approaching the full open position.
The drive unit (3) is secured to the D-pillar (1) with three retaining bolts (4). The drive unit (3) is connected the liftgate (5) with the link rod (6).
The drive unit cannot be adjusted or repaired and if damaged or inoperative must be replaced.
Operation
OPERATION
LIFTGATE IS CLOSED
The power liftgate open command can be initiated by either one press of the power liftgate overhead console switch or two presses of the key fob power
liftgate button. The overhead console switch is hardwired to the power liftgate control module, where as the key fob signal is sent out on the Controller
Area Network (CAN) Data Bus circuit. This signal is detected by the power liftgate control module. The power liftgate control module then interprets
the information to confirm safety requirements are met. The control module will then signal the liftgate mounted latch assembly to release the liftgate
from its primary closed and latched position to the ajar and movable position. The power liftgate drive unit then takes over to move the liftgate into the
full open position.
LIFTGATE IS OPEN
The power liftgate close command can be initiated by either one press of the power liftgate overhead console switch or two presses of the key fob power
liftgate button. The overhead console switch is hardwired to the power liftgate control module, where as the key fob signal is sent out on the Controller
Area Network (CAN) Data Bus circuit. This signal is detected by the power liftgate control module. The power liftgate control module then interprets
the information to confirm safety requirements are met. The control module will then signal the power liftgate drive unit to move the liftgate into the
closed position. Once the liftgate mounted latch reaches the body mounted striker assembly, the power latch takes over to cinch the liftgate to the fully
closed and latched position.
If a obstacle is encountered during a power open or close cycle, the power liftgate control module will automatically reverse direction of the liftgate to
prevent vehicle damage or personal injury.
