Supplemental Restraint System Module (SRS) [2015-2018]: Function: Roll-Over
In case of vehicle roll-over the roll-over sensor senses the vehicle's lateral angle.
Supplemental Restraint System Module (SRS) starts a calculation how high the rotation energy is. If the rotation energy is high enough, the control module will activate the roll-over protection.
All seatbelt tensioners in the vehicle, front (8/33, 8/34), rear (8/55, 8/56, 8/62) and front waist (8/92, 8/93) (only certain markets), will then be activated. Also inflatable curtains (8/66, 8/67) will be activated.
Supplemental restraint system module (SRS) also sends a collision signal on a directly connected line to Central electronic module (CEM) (4/56) and Phone module (PHM) (16/60) (not USA/CAN) when the collision protection has been activated.
A collision status signal is also sent to Central electronic module (CEM) and Phone module (PHM) (not USA/CAN) on the CAN-net. These two control modules make sure that:
- switch off the fuel pump (FP)
- switch off the windshield wipers when the car is stationary
- turn off defrosting of windows and rearview mirrors if the vehicle is stationary
- light the interior lighting
- light the flashing hazard lights
- unlock the central locking system
- send an automatic alarm to CSC (Customer Service Center) when an accident has occurred - provided the vehicle is equipped with Volvo On Call (Plus)
- turn off the fuel engine heater