Control Module

Fig 1: Identifying Power Seat Module (PSM)

Courtesy of VOLVO CARS CORPORATION

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 SIGNALS .