Roll Over Protection

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2014 Volvo XC90, 2013 Volvo XC90, 2012 Volvo XC90, 2011 Volvo XC90, and 2010 Volvo XC90. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Roll Over Protection Components

Courtesy of VOLVO CARS CORPORATION

If the side tilt of the car exceeds 50 - 55 degrees, the supplemental restraint system module (SRS) starts calculating the strength of the rotational energy. If the sideways lean and rotational energy are high enough, the control module will activate the roll over protection. All seat belt tensioners in the car, front (8/33, 8/34), rear (8/55, 8/56, 8/62) and for the third row of seats (8/94, 8/95) (if applicable) will be activated. The front (8/66, 8/67) and rear (8/96, 8/97) inflatable curtains will also be activated.

When the collision protection system has been activated a collision signal is transmitted from the supplemental restraint system module (SRS) (4/9) to the central electronic module (CEM) (4/56) and phone module (PHM) (16/60) on a directly connected cable. These two control modules ensure that:

the central locking system is unlocked
the fuel pump (FP) is switched off
the interior lighting is lit
the warning lamps are lit
the collision pulse is registered
an automatic alarm is sent to CSC (customer service center), and to Volvo On Call (Plus) if applicable.

A collision status signal is also sent to the phone module (PHM) and rear electronic module (REM) (4/58) on the Controller Area Network (CAN).