Roll Over Protection

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).