Power Trunk / Liftgate Control Module: Description and Operation

Power Liftgate Control Module:

Vehicles equipped with a power liftgate (PLG) utilize a PLG control module. This module is located on the vehicles left side D-pillar just below the motor assembly and contains a microprocessor, which is used to communicate to the vehicles body control module. The PLG control module receives and monitors logic inputs from all the PLG system switches except for the outside handle switch. This module also contains the software technology to detect liftgate obstructions and stop and/or reverse the door accordingly.

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 Programmable Communications Interface (PCI) bus circuit with the vehicles Body Control Module (BCM) to monitor many different inputs and outputs such as door lock status, transmission gear selector position and vehicle speed.