System Overview

System overview

Control module




The power seat module, left (PSL) and power seat module, right (PSR) manage the functions for:
- seat operation
- storage of memory positions (seat positions only).
The control modules are located on the outside of the front seats and are integrated in the control panel. The side panels must be detached to replace the control modules.
The power seat module, left (PSL) and power seat module, right (PSR) communicate with both directly connected components and with other control modules via CAN communication.
The control modules check carried out activations and input and output signals via an integrated diagnostic system. A diagnostic trouble code (DTC) is stored in certain cases if the control modules detect a fault.
Any diagnostic trouble codes (DTCs) are stored in the control modules memory. The data can be read off using VIDA.
A simple way to check that the power seat module, left (PSL) and power seat module, right (PSR) are supplied with power and grounded is to move the seat.
If the voltage is below 8.5 V or above 16.0 V, the power seat module, left (PSL) and power seat module, right (PSR) will not function. If the voltage increases to above 9.0 V or falls below 15.5 V, the control module will function again.
For further information, also see Signal specifications.

Signals
The table below summarizes the input signals to and output signals from the power seat module, left (PSL) (3/26) and power seat module, right (PSR) (3/27). The signal types are divided into directly connected signals and CAN communication. The illustration below displays the same information with the Volvo component designations.