System Overview

System overview

control module




The power seat module (PSM) handles the functions of integrated diagnostics. When the control module detects a fault, a diagnostic trouble code is generated in some cases.
Any diagnostic trouble codes are stored in the control module memory. The data can be read off using the diagnostic tool.
A way to check that the power seat module (PSM) (3/26) has a power supply and is grounded is to operate the seat.
The power seat module (PSM) is inoperable if voltage is below 8.5 V or exceeds 16.0 V. The control module becomes operable again when voltage increases to over 9.0 V or drops below 15.5 V.
For further information, also see Signal specifications.

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