S60 AWD L5-2.5L Turbo VIN 59 B5254T2 (2005)
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
-
the interior lighting lights
-
the hazard warning signal flashers are activated
-
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).
A collision status signal is also sent to the phone module (PHM) and the central electronic module (CEM) via the controller area network (CAN).
Activating/deactivating the front passenger airbag (not USA/CDN)
If necessary, the front passenger airbag (8/31 and 8/32) can be deactivated. This is done using a switch (3/157) positioned on the side of the dashboard
on the passenger side.
If the position of the switch is changed from "on" to "off", the level of current at the two Hall sensors connected to the switch changes. The Hall sensors
transmit the altered current levels to the supplemental restraint system module (SRS) (4/9) via directly connected cables.
The control module software deactivates the front passenger airbag, which means that the airbag has no functionality in the event of a collision. The
supplemental restraint system module (SRS) transmits a signal on the controller area network (CAN) to the upper electronic module (UEM) (4/70), with
a request to light the passenger airbag disconnected warning lamp. The upper electronic module (UEM) then lights the passenger airbag disconnected
warning lamp.
When the position of the switch is changed from "off" to "on", a new current level is transmitted from the Hall sensors to the supplemental restraint
system module (SRS). The control module software then activates the airbag, which means that the airbag has full functionality in the event of a
collision. At the same time, the supplemental restraint system module (SRS) transmits a signal on the controller area network (CAN) to the upper
electronic module (UEM), with a request to switch off the passenger airbag disconnected warning lamp. The upper electronic module (UEM) then
switches off the passenger airbag disconnected warning lamp.
NOTE: The on/off switch for the front passenger airbag and occupant weight sensor (OWS) must not be installed in the vehicle together.
Activating/deactivating front passenger airbag (USA/CDN - certain models only)
