Diagnostic Functions: General

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: Identifying Supplementary Restraint System Diagnostic Functions

Courtesy of VOLVO CARS OF NORTH AMERICA.

Model Year 1999-2002

The on-board diagnostic (OBD) system for the SRS continually diagnoses the function of SRS system components and stores any diagnostic trouble codes (DTCs). However, the diagnostics for the two front seat belt buckles are carried out by the central electronic module (CEM) which also stores any diagnostic trouble codes (DTC) for them. If a fault is registered for longer than 5 minutes, the central electronic module (CEM) transmits the diagnostic trouble code (DTC) to the supplemental restraint system module (SRS). The supplemental restraint system module (SRS) then stores diagnostic trouble code(s) (DTC) for the front seat belt buckles. The diagnostic trouble codes (DTCs) can then be read off via the appropriate diagnostics tool. The principle behind the diagnostics tool information presentation is the same as for other on-board diagnostic (OBD) systems.

Model Year 2003-

The on-board diagnostic (OBD) system for the SRS continually diagnoses the function of SRS system components and stores any diagnostic trouble codes (DTCs). The diagnostic trouble codes (DTCs) can then be read off via appropriate diagnostics tool. The principle behind appropriate diagnostics tool information presentation is the same as for other on-board diagnostic (OBD) systems. The front seat belts are directly connected to the supplemental restraint system module (SRS).