Sliding Door Control Module: Operation

The power sliding door control module serves as the main computer for the power sliding side door system. All power door functions are processed through the power door control module and/or the vehicles body control module (BCM). At the start of a power open command, a signal is sent to the BCM and then to the power door control module via the J1850 data bus circuit. This signal, generated by any of the power door command switches, tells the power door control module to activate a power latch release, engage the clutch assembly and drive the door into the full open position. If an obstacle is felt during this power open cycle, the module will reverse direction and close the door. This process is also enabled during a power close cycle. This process will repeat three times, and if a fourth obstacle is detected, the door will go into full manual mode. Once the full open position is obtained, a hold open latch assembly mounted full open switch tells the control module that the door has reached the full open position. If the power sliding door system develops any problems the control module will store and recall Diagnostic Trouble Codes (DTC). The use of a diagnostic scan tool, such as the DRBIII® is required to read and troubleshoot these trouble codes.