Front-End Collision

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2013 Volvo C70, 2012 Volvo C70, 2011 Volvo C70, 2010 Volvo C70, and 2009 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Front-End Collision

Courtesy of VOLVO CARS CORPORATION

In the event of a frontal collision, the sensors in the Supplemental restraint system module (SRS) (4/9) and frontal impact sensors (7/178 and 7/179) evaluate the mechanical stresses. The Supplemental restraint system module (SRS) determines which protection system is to be activated in the situation.

If the impact fulfils the conditions to activate the protection system the Supplemental restraint system module (SRS) sends an activation signal, a current pulse, to:

front airbags (8/30, 8/31, 8/32 and 8/61) and/or
seat belt tensioner (8/33, 8/34, 8/55 and 8/56) and/or
the adaptive steering column (8/99) and/or
the function for adaptive seatbelt force limiting.

The passenger airbag will not be deployed if it is deactivated using the Occupant weight sensor (OWS) (7/93).

A collision signal is transmitted on a direct connection from the supplemental restraint system module (SRS) to the central electronic module (CEM) (4/56) and phone module (PHM) (16/60) when the collision protection system is activated. These two control modules ensure that:

switch off the fuel pump (FP)
switch off the engine cooling fan (FC)
switch off the windshield wipers when the car is stationary
switch on the interior lighting and the courtesy lighting
set the vehicle to collision status
unlock the central locking system and
if the vehicle is equipped with Volvo On Call (Plus), send an automatic alarm to CSC (Customer Service Center).