Front-End Collision (Not USA/CDN)

In case of a frontal collision, a function called multi-point sensing is used. This means that the collision pulse is registered at several points. This function is integrated in Supplemental restraint system module (SRS) (4/9).

When the collision pulse is strong enough, an activation signal, a current pulse, to airbags front (8/30, 8/31, 8/32 and 8/61) and/or seatbelt tensioners (8/33, 8/34, 8/55, 8/56, and on certain models 8/92).

The front-end collision sensors (7/178 and 7/179) are also included in multi-point sensing in the control module. They register the collision pulse and send acceleration data to the control module. Airbags driver and passenger front are activated. Seatbelt tensioners front are activated.

The passenger airbag will not be activated if it is deactivated with the switch (3/157).

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:

• the central locking system is unlocked
• the fuel pump (FP) is switched off
• windshield wipers are turned off if the vehicle is stationary
• interior lighting is activated
• warning lamps are lit
• the collision pulse is registered
• an automatic alarm is sent to CSC (customer service center) if the vehicle is equipped with Volvo On Call (Plus).