System Overview: Signals

The table below summarizes input and output signals to and from the power seat module (PSM) (3/26). The signal types are divided into directly connected signals and Controller area network (CAN) communication. The illustration below displays the same information with the Volvo component designations.

Input signals	Output signals
Directly connected:	Directly connected: (Power supply unless otherwise stated)
Hall sensors (four, integrated in the seat motors).	Seat motors (6/16, 6/17, 6/18, 6/19).
Via Controller Area Network (CAN) communication:	Via Controller Area Network (CAN) communication:
Central electronic module (CEM) (4/56).	Driver door module (DDM) (3/126) Passenger door module (PDM) (3/127).

Fig 1: Identifying Power Seat Module Communications Network

Courtesy of VOLVO CARS OF NORTH AMERICA.