System Overview: Signals

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2014 Volvo XC90, 2013 Volvo XC90, 2012 Volvo XC90, 2011 Volvo XC90, and 2010 Volvo XC90. However, it is still accessible from the selected car via links, so may be relevant.

The table below summarizes input and output signals to and from the power seat module (PSM) (4/52). The signal types are divided into directly connected signals, serial communication 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:
Control panel (3/26) with: Control buttons (eight input signals, two buttons) Memory button 1, 2 and 3 Programming button (MEM). Hall sensors (four integrated into the seat motor) Control circuit connected to the control panel.	Seat motors (6/16-19) (four units).
Via Controller Area Network (CAN) communication:	Via Controller Area Network (CAN) communication:
Central electronic module (CEM) (4/56) Upper electronic module (UEM) (4/70).	Driver door module (DDM) (3/126) Passenger door module (PDM) (3/127).

Fig 1: Identifying Volvo Component Designations

Courtesy of VOLVO CARS CORPORATION