D Pillar Switch - Operation

OPERATION

The rear power liftgate switch (also known as the D-pillar switch) is a momentary, push button actuated, resistor multiplexed switch. The switch receives source voltage from the Power Liftgate Module (PLGM) through an internal pull up on a power liftgate logic return circuit. The switch then provides a multiplexed output to the PLGM on a liftgate switch rear signal circuit. The output to the PLGM indicates whether the switch push button is depressed or released.

When the switch push button is depressed, it provides a Close request to the PLGM. If the push button is depressed a second time, while the PLGM is in the process of closing the liftgate, the PLGM will automatically reverse the liftgate to the full open position. This switch will NOT open the liftgate if it is already closed.

The rear power liftgate switch as well as the hard wired inputs and outputs of the switch may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. However, conventional diagnostic methods will not prove conclusive in the diagnosis of the power liftgate system or the electronic controls and communication between other modules and devices that provide some features of the power liftgate system. The most reliable, efficient, and accurate means to diagnose the power liftgate system or the electronic controls and communication related to rear power liftgate switch operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.