Power Sliding Door System: Operation: Notes

With the push of a power sliding door open/close command switch (key fob, overhead console or B-pillar mounted) a signal is sent out to the Body Control Module (BCM). The BCM then sends a signal out on the Programmable Communication Interface (PCI) Data Bus circuit to the power sliding door module. The power sliding door module then signals the power sliding door latch to release the door to the unlatched and movable position. The motor then starts an open cycle.

During the door cycle, if the power sliding door module detects sufficient resistance to door travel, such as an obstruction in the door's path, the power sliding door module will immediately stop door movement and reverse door travel to the full open or closed position. The ability for the power sliding door module to detect resistance to door travel is accomplished by hall effect sensors detecting the door motor speed.

The power sliding door control module has the ability to learn. Anytime a door is opened or closed using the power sliding door system the module learns from its cycle. If a replacement power sliding door component is installed or a door adjustment is made, the module must re-learn the effort required to open or close the door. A learn cycle can be performed with a complete cycle of the door, using any one of the command switches or with the DRB III®, or equivalent scan tool. (Refer to ELECTRICAL/POWER DOORS - STANDARD PROCEDURE - LEARN CYCLE)  for detailed instructions.

The power sliding door system is designed with a number of system inhibitors. These inhibitors are necessary for safety and/or feasibility of the power sliding door system. The power sliding door system inhibitors are:

1. The power sliding door must be in the full  open or closed position in order for the power sliding door system to start a cycle. If the door is not in this position (based on the input from the full open, pawl or ratchet switches) the door control module will not respond to command switch inputs.
2. The transmission must be in park or neutral  in order for the power sliding door system to start a cycle.
3. The child lockout switch must be in the "UNLOCKED" position in order for the power sliding door systems B-pillar switches to function.
4. If multiple obstacles are detected during the same power open or close cycle the power sliding door may go into full manual mode.
5. If severe Diagnostic Trouble Codes (DTC) are stored in the power sliding door control module the power sliding door may go into full manual mode.
6. Due to the high pressure created in the passenger compartment with the blower motor on high, the power sliding door may not complete a power close cycle unless a window is cracked, allowing the pressure to escape. This situation will only be experienced on some vehicles, or vehicles with brand new side door weather seals installed.
7. The fuel tank filler door must be in the closed position. Due to the sliding door interference with the open fuel tank filler door, a mechanical linkage prevents the side door from opening and striking the fuel door. Refer to BODY DIAGNOSTIC PROCEDURES article for detailed information on the fuel door lockout feature.