Grand Caravan V6-4.0L (2008)
Trunk / Liftgate Motor: Description and Operation
Power Liftgate Drive Unit Motor
Description
DESCRIPTION
Vehicles equipped with a power liftgate, utilize a liftgate motor. The liftgate motor is a simple DC motor that can be operated in forward or reverse,
depending on the voltage polarity supplied by the power liftgate control module. The motor is attached to the power liftgate drive unit by three retaining
bolts.See: Power Liftgate Drive Unit - Description for a complete description of the entire drive unit assembly and components.
The power liftgate motor cannot be repaired or adjusted, and if found to be inoperative the motor must be replaced.See: Service and Repair/Power
Liftgate Drive Unit Motor - Removal for detailed instructions.
Operation
OPERATION
LIFTGATE IS CLOSED
The power liftgate open command can be initiated by either one press of the power liftgate overhead console switch, one press of the power liftgate
D-Pillar switch or two presses of the key fob power liftgate button. The overhead console and D-Pillar switches are 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 open command can be initiated by either one press of the power liftgate overhead console switch, one press of the power liftgate
D-Pillar switch or two presses of the key fob power liftgate button. The overhead console and D-Pillar switches are 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 an 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.