Power Liftgate Drive Unit Motor

Power Liftgate Drive Unit Motor

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. For a complete description of the entire drive unit assembly and components. Refer to => [ Power Liftgate Drive Unit ] Power Liftgate Drive Unit.

The power liftgate motor cannot be repaired or adjusted, and if found to be inoperative the motor must be replaced. Refer to=> [ Power Liftgate Drive Unit Motor ] Power Liftgate Drive Unit Motor.

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 hard wired to the power liftgate control module, where as the key fob signal is sent out on the controller area network 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 hard wired to the power liftgate control module, where as the key fob signal is sent out on the 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.