Operation

OPERATION

The power liftgate control module contains the electronic circuitry and software used to control the sequence of events for the power liftgate system. This module communicates on the Controller Area Network (CAN) to monitor many different inputs and outputs such as door lock status, transmission gear selector position and vehicle speed.

The power liftgate open/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 switch. The overhead switch is hardwired to the power liftgate control module. The key fob, sends a signal out on the Controller Area Network (CAN) Data Bus circuit. This signal is detected at the power liftgate control module. The power liftgate control module then interprets the information to confirm safety requirements are met before applying power to the power liftgate drive unit to start a power cycle.

During a power liftgate open or close cycle, if the power liftgate control module detects sufficient resistance to liftgate travel, such as an obstruction in the liftgate's path. The control module will immediately stop liftgate movement and reverse the direction of travel to the full open or closed position.

The power liftgate control module has the ability to relearn. After 8 miles have been recorded on the odometer, anytime the liftgate is fully opened and fully closed using the automatic system, the module will learn from its cycle. If a replacement power liftgate component is installed or a liftgate adjustment is made, the module will relearn the effort and time required to open or close the liftgate. This learn cycle can be performed with a Diagnostic Scan Tool or with a complete cycle of the liftgate, using either one of the command switches. Power Liftgate Learn Cycle for detailed instructions.