Control Module
The primary task of the power seat module (PSM) is to manage the functions for:
- seat operation
- storage of memory positions (seat positions only).
The control module is beside the seat on the driver's side and is integrated with the control panel. The side panel must be removed to replace the control module.
The power seat module (PSM) communicates with directly connected components and with other control modules via CAN communication.
The control module checks activations and input and output signals via an integrated diagnostic system. A diagnostic trouble code (DTC) is stored in certain cases if the control module detects a fault.
Any diagnostic trouble codes (DTCs) are stored in the control module memory. The data can be read off using VIDA (Volvo scan tool).
A simple way to check that the power seat module (3/26) is 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 (PSM) will not function. If the voltage increases to above 9.0 V or falls below 15.5 V, the control module will function again.