Control Module

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2009 Volvo S60, 2008 Volvo S60, 2007 Volvo S60, 2006 Volvo S60, and 2005 Volvo S60. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Locating Supplemental Restraint System (SRS) Control Module

Courtesy of VOLVO CARS OF NORTH AMERICA.

The supplemental restraint system module (SRS) handles functions for:

seat belt tensioners
side impact sensors
front impact sensor (certain markets and models only)
side impact protection (SIPS) bags
front driver and passenger airbags
inflatable curtains
SRS indication
passenger airbag indication
collision output signal
collision registration
front seat belt buckles
switch on/off, front passenger airbag (not USA/CDN)
occupant weight sensor (OWS) (certain markets and models only)

The control module is in the transmission tunnel, between the gear selector lever and the parking brake.

The supplemental restraint system module (SRS) communicates with directly connected components and with other control modules via the Controller Area Network (CAN).

The control module checks the input and output signals through an integrated diagnostic system. A diagnostic trouble code (DTC) is stored 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 an appropriate diagnostics tool.

The control module can process multiple collisions, frontal collisions, collisions from behind, side-on collisions and overturning.

The control module function can be easily checked by switching on the ignition. The SRS indicator lamp in the combined instrument panel must light up when the key is in ignition positions I-III. The lamp goes out after a short while if no faults are detected. This means that the supplemental restraint system (SRS) is functioning correctly.